CN107266107A - A kind of fibrofelt enhancing aeroge foamed concrete and preparation method thereof - Google Patents
A kind of fibrofelt enhancing aeroge foamed concrete and preparation method thereof Download PDFInfo
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- CN107266107A CN107266107A CN201610214837.5A CN201610214837A CN107266107A CN 107266107 A CN107266107 A CN 107266107A CN 201610214837 A CN201610214837 A CN 201610214837A CN 107266107 A CN107266107 A CN 107266107A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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Abstract
The invention discloses a kind of fibrofelt enhancing aeroge foamed concrete and preparation method thereof, it is characterized in that, it is made up of aerogel powder, foamed concrete and fibrofelt, the aerogel powder is made up of inner hydrophobic layer and surface hydrophilic layer, and the surface hydrophilic thickness degree is 0.1 ~ 100 μm.The preparation method of the fibrofelt enhancing aeroge foamed concrete of the present invention comprises the following steps：（1）Aerogel powder is modified；（2）By step（1）Obtained aerogel powder is dry-mixed with binder materials, and then add water wet mixing；（3）By step（2）Obtained wet compound is mixed with CBA, stirring；（4）By step（3）Wet compound infiltrate to fibrofelt, foam.Aerogel powder is nano-porous structure in the fibrofelt enhancing aeroge foamed concrete of the present invention, fibrofelt enhancing aeroge foamed concrete has excellent thermal and insulating performance and mechanical property, the fields such as wall thermal insulating, fire prevention, sound insulation are can be widely applied to, market application foreground is huge.
Description
Technical field
The present invention relates to a kind of construction material and preparation method thereof, more particularly to a kind of enhancing aeroge foaming of fibrofelt are mixed
Solidifying soil and preparation method thereof, belongs to the fields such as lightweight, thermal insulation, fire prevention, acoustic material.
Background technology
With the development of the society, being on the rise the problems such as energy crisis, environmental degradation.2006,《National economy and society
Develop 11th Five-Year Plan outline》" energy-saving and emission-reduction " concept is proposed first, it is proposed that the Eleventh Five-Year Plan period（2006-2010
Year）Energy consumption per unit reduction by 20% or so, total emissions of major pollutants reduces by 10% the binding indicator." section
Can " promotion " emission reduction ", produce at home in total energy consumption, building energy consumption accounts for 33%, and building energy conservation is the weight of China's energy-saving and emission-reduction cause
In it is weight.According to statistics, the heat loss of wall body structure takes wall the key that heat insulation measure is building energy conservation with respect to highest
Step.
Conventional wall heat insulation material has expanded polystyrene (EPS), polyurathamc, rock wool, thermal insulation mortar, foamed glass, biography
System foamed concrete etc..Expanded polystyrene (EPS) and polyurathamc heat-proof quality are excellent, but it meets fiery inflammable, generation asphyxiating
Smog, it is serious to threaten owner's safety；Rock wool heat-proof quality is excellent, but meets water failure, and difficulty of construction is big；Thermal insulation mortar is prevented fires
Performance is good, but thermal conductivity factor is of a relatively high；Foamed glass is easily scaling-off, and cost is higher, influences its engineer applied.
Compared with existing insulation material, foamed concrete belongs to A grades of insulation materials, and low excellent with intensity height, cost
Gesture, still, its heat preservation and insulation is not as good as organic foam insulation material.Therefore, the thermal insulation separation of foamed concrete is further improved
Hot property is significant.
Aeroge is a kind of light-weight inorganic solid material with three-dimensional network skeleton structure and nanoscale hole hole, with pole
High porosity, specific surface area, extremely low density and solid content, chemical inertness and noninflammability, show excellent lightweight, insulation
The characteristics such as heat-insulated, fire prevention, sound insulation, damping energy-absorbing, thermal conductivity factor can as little as 0.013W/mK.Therefore, if aeroge is added to
It is expected to break through the bottleneck that restriction further improves foamed concrete heat preservation and insulation in foamed concrete.Fibrofelt has excellent
Mechanical property, such as pliability, shear resistant, compression strength, if can significantly improve fibrofelt and foamed concrete are compound
The mechanical property of foamed concrete.
However, running into following technical bottleneck when researching and developing fibrofelt enhancing aeroge foamed concrete：（1）Due to aeroge
Powder and concrete density difference are big, in mixed process, easily occur phenomenon of phase separation therebetween, cause the aeroge to be difficult
It is evenly distributed in concrete system, causes foamed concrete mechanical property degradation, and heat-insulating property improves unobvious；
（2）In foamed concrete preparation process, aeroge nano-porous structure is easily by the water and cement raw material in concrete
Additive etc. is destroyed, and loses the excellent heat-insulating property that aeroge comes by nano-porous structure characteristic strip；（3）Aeroge and gelling
Usually because boundary strength is low between material, between fibrofelt and binder materials, foamed concrete mechanical property is caused significantly to drop
It is low, and it is easily caused aerogel powder and fibrofelt comes off from concrete substrate.
The content of the invention
For above-mentioned technical problem, the present invention proposes a kind of fibrofelt enhancing aeroge foamed concrete and its preparation side
Method.
A kind of fibrofelt strengthens aeroge foamed concrete, is made up of aerogel powder, foamed concrete and fibrofelt, institute
State aerogel powder to be made up of inner hydrophobic layer and surface hydrophilic layer, the surface hydrophilic thickness degree is 0.1 ~ 100 μm.
In one of the embodiments, the fibrofelt be glass mat, basalt fibre felt, alumina fiber blanket,
Carbon fiber felt, silicon carbide fibre felt, lignin fibre felt, polypropylene fibre felt, vinal felt, polyvinyl chloride fibre felt
In one or more.
A kind of fibrofelt strengthens the preparation method of aeroge foamed concrete, comprises the following steps：
（1）Aerogel powder is modified；
（2）By step（1）Obtained aerogel powder is dry-mixed with binder materials, and then add water wet mixing；
（3）By step（2）Obtained wet compound is mixed with CBA, stirring；
（4）By step（3）Wet compound infiltrate to fibrofelt, foam.
In one of the embodiments, the step（1）Including hydrophobically modified step；The hydrophobically modified is closed
Hydrophobically modified is carried out to aerogel powder in hydrophobic modifier gaseous environment；The hydrophobic modifier is trim,ethylchlorosilane, six
Methyl disilazane, HMDO, MTMS, MTES, dimethylformamide dimethyl epoxide
Silane, dimethyldiethoxysilane, γ-aminopropyltrimethoxysilane, gamma-aminopropyl-triethoxy-silane, γ-（2,3-
The oxygen of epoxy third）Propyl trimethoxy silicane, γ-methacryloxypropyl trimethoxy silane, N-（β-aminoethyl）-γ-
One or more mixtures in aminopropyl triethoxysilane.
In one of the embodiments, the step（1）Also include surface hydrophilic modification step；The surface hydrophilic modification
To be modified using surface hydrophilic modification solution to hydrophobic aerogel powder surface；The surface hydrophilic modification solution is surface
The aqueous solution of the aqueous solution or low surface tension solvent of activating agent and low surface tension solvent；The surfactant is anion
One kind or many in type surfactant, cationic surface active agent, amphoteric surfactant, nonionic surface active agent
Kind；The anionic surfactant is fatty alcohol phosphates, aliphatic alcohol polyoxyvinethene phosphate salt, alkylsurfuric acid
Salt, fatty alcohol polyoxyethylene ether sulfate, fatty acid glyceride sulfate, sulphation ricinoleate, cycloalkanes sulfate, fatty acyl
Amine alkyl sulfate, alkylbenzenesulfonate, alkylsulfonate, fatty acid methyl ester ethoxylate sulfonate, fatty acid methyl ester sulphur
One or more in hydrochlorate, aliphatic alcohol polyethenoxy ether carboxylate；The cationic surface active agent is aliphatic ammonium salt；
The amphoteric surfactant is alkyl amino acid, carboxylic acid group's glycine betaine, sulfobetaines, phosphate glycine betaine, alkyl hydroxy
One or more in amine oxide；The nonionic surface active agent is aliphatic polyester, APES, high-carbon
AEO, polyoxyethylene carboxylate, fatty acid methyl ester ethoxylate, the oxireme addition of polypropylene glycol
One or more in thing, sorbitan ester, sucrose fatty ester, alkyl esteramides；The low surface tension solvent is third
One or more mixtures in ketone, n-hexane, pentane, normal heptane, ethanol, isopropanol, the tert-butyl alcohol, propane diols, glycerine.
In one of the embodiments, in the surface hydrophilic modification step, in addition to additional physical field action step；Institute
It is one kind in far infrared radiation, stirring, ultrasonication, ball milling to state additional physical field action step.
In one of the embodiments, the step（1）Also include drying process step；The drying process step is remote
One kind in infra-red drying, spray drying, microwave drying, constant pressure and dry, supercritical drying, subcritical drying, freeze-drying.
In one of the embodiments, the step（2）And/or step（3）In can also add phase-changing energy storage material, it is light
One or more in aggregate, admixture, fiber, fire retardant, wood powder, additive；The phase-changing energy storage material is microcapsules bag
One or more in the inorganic water and salt that cover, higher aliphatic hydrocarbon, polyalcohol, multi-hydroxy carboxy acid；The lightweight aggregate is clinker, swollen
Swollen vermiculite, expanded perlite, glass bead, light weight sand, polyurethane foam particles, the one or more of polystyrene foam particles；
The admixture is the one or more in adding calcium fly ash, II grade of flyash, silicon ash, ground slag powder, phosphorus slag powder；The resistance
Combustion agent is one or both of magnesium hydroxide, aluminium hydroxide；The additive is the surfactant, water reducer, hydrophobic
One or more in agent, coagulant, retarder, thickener, foam stabilizer, preservative；The water reducer is polycarboxylic acid diminishing
One or more in agent, lignin sulfonic acid sodium salt water reducer, naphthalene water reducer, aliphatic water reducing agent, amino water reducer；It is described
Hydrophober is the one or more in hard sulfonate hydrophober, organosilicon moisture repellent；The coagulant be sodium metasilicate, aluminum sulfate,
One or more in sodium nitrate, calcium nitrate, sodium sulphate, sodium carbonate, lithium carbonate；The retarder is citric acid, polyphosphoric acids
One or more in sodium, bone glue protein, borax；The thickener is methylcellulose, ethyl cellulose, hydroxylmethyl cellulose
One or more in element, hydroxyethyl cellulose, bentonite, white carbon, starch；The foam stabilizer is polyacrylamide, poly- second
One or more in enol, silicones polyethers emulsion, DDAO, alkylolamides；The preservative
For 1,2- benzisothiazole-3-ketones, CMIT, MIT, 1,
One or more in 3,5- tri- (2- ethoxys) s-triazine, hexahydro -1,3,5- triethyl groups-triazine.
In one of the embodiments, the binder materials be portland cement, aluminate cement, sulphate aluminium cement,
Magnesia oxychloride cement, gypsum, lime, waterglass, acrylic resin, polyurethane resin, epoxy resin, organic siliconresin, fluorine carbon tree
One or more in fat.
In one of the embodiments, the CBA is dioxygen water foaming agent, ammonium hydrogen carbonate foaming agent, azo two
One or more in formamide foaming agent, aluminium powder foaming agent.
A kind of thermal conductivity factor of above-mentioned fibrofelt enhancing aeroge foamed concrete is 0.03 ~ 0.09 W/mK, pressure resistance
Spend for 1.0 ~ 20.0MPa, can be widely applied to the fields such as wall thermal insulating, fire prevention, sound insulation.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, specific reality below to the present invention
The mode of applying is described in detail.Many details are elaborated in the following description to fully understand the present invention.But
The invention can be embodied in many other ways as described herein, and those skilled in the art can be without prejudice to this hair
Similar improvement is done in the case of bright intension, therefore the present invention is not limited to the specific embodiments disclosed below.
The fibrofelt of the present invention strengthens a kind of embodiment of aeroge foamed concrete, by aerogel powder, foaming coagulation
Soil and fibrofelt composition, the aerogel powder are made up of inner hydrophobic layer and surface hydrophilic layer, the surface hydrophilic thickness degree
For 0.1 ~ 100 μm.
In this way, the present invention compounds aerogel powder, fibrofelt and foamed concrete so that aerogel powder is in fibrofelt
It is uniformly distributed in enhanced foaming concrete, aerogel powder still keeps nano-porous structure；With the existing foamed concrete of in the market
Compare, fibrofelt enhancing aeroge foamed concrete of the invention has more excellent mechanical property and thermal and insulating performance,
It is widely portable to the neck such as green building and super low energy consumption and exterior wall, self heat insulation wall, the floor dividing plate of nearly zero energy consumption building
Domain.
In the present embodiment, the fibrofelt be glass mat, basalt fibre felt, alumina fiber blanket, carbon fiber felt,
One kind in silicon carbide fibre felt, lignin fibre felt, polypropylene fibre felt, vinal felt, polyvinyl chloride fibre felt
Or it is a variety of.
In this way, aeroge foamed concrete and fibrofelt are combined by the present invention, the anti-of foamed concrete can be significantly improved
Folding endurance energy, compressive property, it is possible to assign aeroge foamed concrete certain pliability, and aeroge foaming can be reduced
The drying shrinkage value of concrete.
A kind of fibrofelt strengthens the preparation method of aeroge foamed concrete, comprises the following steps：
（1）Aerogel powder is modified；
（2）By step（1）Obtained aerogel powder is dry-mixed with binder materials, and then add water wet mixing；
（3）By step（2）Obtained wet compound is mixed with CBA, stirring；
（4）By step（3）Wet compound infiltrate to fibrofelt, foam.
In addition, step（4）Fibrofelt can also be heated before or silane coupler immersion etc. processing, it is therefore an objective to carry
Interface bond strength between high microsteping felt and binder materials, prevents fibrofelt from being come off from foamed concrete；Step（4）In
Infiltration can be that fibrofelt is immersed in into wet compound, or under pressure or condition of negative pressure, by step（3）Wet compound it is equal
In the even space being filled between fibrofelt, wet compound foams in fibrofelt, obtains fibrofelt enhancing aeroge foaming mixed
Solidifying soil.
In this way, the preparation method of the aeroge foamed concrete of the present invention has, technique is simple, process cycle is short, sharp useless ring
The advantages such as guarantor, are adapted to industrialized production.
In the present embodiment, the step（1）Including hydrophobically modified step；The hydrophobically modified step is closed hydrophobic
Hydrophobically modified is carried out to aerogel powder in modifying agent gaseous environment；The hydrophobic modifier is trim,ethylchlorosilane, hexamethyl
Disilazane, HMDO, MTMS, MTES, dimethyldimethoxysil,ne,
Dimethyldiethoxysilane, γ-aminopropyltrimethoxysilane, gamma-aminopropyl-triethoxy-silane, γ-（2,3- epoxies third
Oxygen）Propyl trimethoxy silicane, γ-methacryloxypropyl trimethoxy silane, N-（β-aminoethyl）- γ-aminopropyl
One or more in triethoxysilane.
In this way, because in existing aeroge preparation method, precursor, displacement solvent and drying process are to the hydrophobic of aeroge
Property have significant effect, if aeroge surface and water contact angle be more than 90 °, hydrophobically modified can not be carried out in advance, directly
Tap into row surface hydrophilic modification；If the surface of aeroge and the contact angle of water are less than 90 °, need to carry out hydrophobic change in advance
Property；Hydrophobically modified is carried out to aerogel powder in closed hydrophobic modifier gaseous environment, except significantly improving airsetting rubber powder
The modified effect of body, it is ensured that outside inside nano-porous structure is not destroyed during follow-up hydrophilic modifying, also significantly improve modification efficiency
And production efficiency, reduce production cost.
In the present embodiment, the step（1）Also include surface hydrophilic modification step；The surface hydrophilic modification step is to adopt
Hydrophobic aerogel powder surface is modified with surface hydrophilic modification solution；The surface hydrophilic modification solution is surface-active
The aqueous solution of the aqueous solution or low surface tension solvent of agent and low surface tension solvent；The surfactant is anionic table
One or more in face activating agent, cationic surface active agent, amphoteric surfactant, nonionic surface active agent；
The anionic surfactant is fatty alcohol phosphates, aliphatic alcohol polyoxyvinethene phosphate salt, alkyl sulfate, fat
Fat alcohol polyoxyethylene ether sulfate, fatty acid glyceride sulfate, sulphation ricinoleate, cycloalkanes sulfate, fatty acid amide alkane
Base sulfate, alkylbenzenesulfonate, alkylsulfonate, fatty acid methyl ester ethoxylate sulfonate, MES,
One or more in aliphatic alcohol polyethenoxy ether carboxylate；The cationic surface active agent is aliphatic ammonium salt；It is described
Amphoteric surfactant is alkyl amino acid, carboxylic acid group's glycine betaine, sulfobetaines, phosphate glycine betaine, alkyl hydroxy oxidation
One or more in amine；The nonionic surface active agent is aliphatic polyester, APES, high carbocyclic aliphatic
Alcohol APEO, polyoxyethylene carboxylate, fatty acid methyl ester ethoxylate, the oxireme addition product of polypropylene glycol,
One or more in sorbitan ester, sucrose fatty ester, alkyl esteramides；The low surface tension solvent be acetone,
One or more in n-hexane, pentane, normal heptane, ethanol, isopropanol, the tert-butyl alcohol, propane diols, glycerine.
In this way, the aqueous solution of the aqueous solution or low surface tension solvent using surfactant and low surface tension solvent,
In hydrophilic modifying processing procedure is carried out to hydrophobic aerogel powder surface there is surface to cooperate with hydrophilic modifying effect, can significantly carry
High surface hydrophilic modification solution aerogel powder surface wetting spreading rate, while significantly slowing to the inside of aerogel powder
Wetting extension, by regulating and controlling the consumption of modified solution, can accurately realize to aerogel powder surface hydrophilic thickness degree
Regulation and control, low surface tension solvent not only with water and surfactant there is surface to cooperate with hydrophilic modifying effect, and can be big
The earth is lowered into the capillary force of the hydrophilic modifying solution in the nano-pore of aerogel powder top layer, it is easy to pass through drying process
Hydrophilic modifying solution in the nano-pore of aerogel powder top layer is evaporated, without destroying its nano-porous structure, the present invention
Aerogel powder present inner hydrophobic, surface hydrophilic, surface hydrophilic layer still retain nano-porous structure and surface hydrophilic thickness
The architectural feature for 0.1 ~ 100 μm is spent, there is good interface cohesion between binder materials；The technique have step it is simple,
The features such as cycle is short, production efficiency is high, it is adaptable to industrialized production.
In the present embodiment, in the surface hydrophilic modification step, in addition to additional physical field action step；The additional thing
It is one kind in far infrared radiation, stirring, ultrasonication, ball milling to manage field action step.
In this way, additional physics field action can significantly improve the activity and and aerogel powder of surface hydrophilic modification solution
Contact probability, reduce dosage of surfactant, improve aerogel powder surface hydrophilic modification speed, reduce cost, improve
Production efficiency.
In the present embodiment, the step（1）Also include drying process step；The drying process step is dry for far infrared
One kind in dry, spray drying, microwave drying, constant pressure and dry, supercritical drying, subcritical drying, freeze-drying.
If in this way, aerogel powder and binder materials compound tense after hydrophilic modifying, the remaining hydrophilic modifying in top layer are molten
Liquid can influence interface cohesion, and processing need to be pre-dried；Using above-mentioned drying process, aerogel powder top layer nano-pore knot is being ensured
On the premise of structure is not destroyed, surface hydrophilic modification solution remaining in the nano-pore of aerogel powder top layer is evaporated, carried
Interface bond strength between high aerogel powder and binder materials.
In the present embodiment, the step（2）And/or step（3）In can also add phase-changing energy storage material, lightweight aggregate, mix
Close the one or more in material, fiber, fire retardant, wood powder, additive；The phase-changing energy storage material is inorganic for microcapsule coated
One or more in water and salt, higher aliphatic hydrocarbon, polyalcohol, multi-hydroxy carboxy acid；The lightweight aggregate be clinker, expanded vermiculite,
Expanded perlite, glass bead, light weight sand, polyurethane foam particles, the one or more of polystyrene foam particles；The blending
Expect for the one or more in adding calcium fly ash, II grade of flyash, silicon ash, ground slag powder, phosphorus slag powder；The fire retardant is hydrogen
One or both of magnesia, aluminium hydroxide；The additive is the surfactant, water reducer, hydrophober, promotees solidifying
One or more in agent, retarder, thickener, foam stabilizer, preservative；The water reducer is polycarboxylic acids dehydragent, wooden
One or more in plain sulfonate sodium water reducer, naphthalene water reducer, aliphatic water reducing agent, amino water reducer；The hydrophober
For the one or more in hard sulfonate hydrophober, organosilicon moisture repellent；The coagulant be sodium metasilicate, aluminum sulfate, sodium nitrate,
One or more in calcium nitrate, sodium sulphate, sodium carbonate, lithium carbonate；The retarder is citric acid, sodium polyphosphate, gelatine
One or more in protein, borax；The thickener is methylcellulose, ethyl cellulose, hydroxymethyl cellulose, hydroxyl second
One or more in base cellulose, bentonite, white carbon, starch；The foam stabilizer is polyacrylamide, polyvinyl alcohol, silicon
One or more in resin polyethers emulsion, DDAO, alkylolamides；The preservative is 1,2- benzene
And isothiazoline -3- ketone, CMIT, MIT, 1,3,5- tri-
One or more in (2- ethoxys) s-triazine, hexahydro -1,3,5- triethyl groups-triazine.
In this way, phase-changing energy storage material can be absorbed by phase transformation or discharge a large amount of heat energy, architecture indoor temperature is adjusted with this,
Comfortable quality of building is improved, the aeroge foamed concrete of the present invention can be improved by saving the energy, also, adding phase-changing energy storage material
Freezing and thawing performance；Lightweight aggregate has low density, high compression strength, good heat-insulating property, and addition lightweight aggregate can be carried
High aeroge foamed concrete mechanical property, heat-insulating property, substantially do not increase or decrease its density；It can be improved using admixture
The workability of concrete, glutinous poly- property, reduce the slump of concrete, are conducive to the pore-size distribution of aeroge foamed concrete equal
It is even, and then improve the mechanical property and heat-insulating property of aeroge foamed concrete；Also, be conducive to industrial waste using admixture
Use, reduce aeroge foamed concrete cost, energy-conserving profit waste；Addition fire retardant can improve the aeroge hair of the present invention
The fire-protection rating of concrete is steeped, meeting fire due to fire retardants such as magnesium hydroxide, aluminium hydroxides occurs the dehydration endothermic reaction, extends matrix
The elevated speed of temperature；Addition wood powder can improve the intensity between aeroge foamed concrete and anchoring piece, screw；Add table
Face activating agent can improve wetting efficiency of the binder materials to surfaces such as fiber, lightweight aggregates, so improve binder materials and fiber,
Interface bond strength between binder materials and lightweight aggregate；Addition water reducer can improve concrete flowability and slump, drop
Low water usage amount, improves the mechanical property of aeroge foamed concrete；Addition hydrophober can significantly reduce aeroge foaming coagulation
The water absorption rate of soil, particularly the aeroge foamed concrete with through-hole structure, improves the freeze thawing resistance of aeroge foamed concrete
Property and weatherability；The solidification rate that coagulant accelerates binder materials is added, when can reduce the initial set of aeroge foamed concrete
Between, reduce aeroge foamed concrete aperture so that aeroge foamed concrete even aperture distribution, improve aeroge foaming mixed
Solidifying soil mechanics performance and heat-insulating property；Addition retarder can slow down the solidification rate of binder materials, when using gypsum, due to
Gypsum speed is too fast, it is necessary to add retarder regulation firm time；Addition thickener can increase concrete viscosity, improve
The stability and porosity of foamed concrete abscess so that the shape of aeroge foamed concrete abscess is generally the ball-type of rule,
And then improve the mechanical property and heat-insulating property of aeroge foamed concrete；Addition foam stabilizer can improve aeroge foaming coagulation
The cell stability and porosity of soil, and then improve the mechanical property and heat-insulating property of aeroge foamed concrete；Add anti-corrosion
Agent can avoid aeroge foamed concrete from going mouldy, and improve its service life and durability；The step of the present invention（2）Using
Two step hybrid techniques of dry-mixed-wet mixing, solve because aerogel powder with the difference in specific gravity of binder materials is big mix when cause layering, reality
Existing uniform mixing of the modified aerogels powder in concrete, while reducing influence of the aerogel powder to foaming process, favorably
In control foaming quality, low thermal conductivity factor is realized.
In the present embodiment, the binder materials is portland cement, aluminate cement, sulphate aluminium cement, chlorine oxygen magnesium water
One in mud, gypsum, lime, waterglass, acrylic resin, polyurethane resin, epoxy resin, organic siliconresin, fluorocarbon resin
Plant or a variety of.
In the present embodiment, the CBA is dioxygen water foaming agent, ammonium hydrogen carbonate foaming agent, azodicarbonamide hair
One or more in infusion, aluminium powder foaming agent.
In this way, blowing agent type have to the pass of aeroge foamed concrete, pore-size distribution, water absorption rate, heat-insulating property compared with
Big influence, the present invention prepares the fibrofelt with excellent insulation, sound insulation, fire protecting performance using one or more foaming agents and increased
Strong aeroge foamed concrete.
A kind of thermal conductivity factor of above-mentioned superthermal insulation aeroge foamed concrete is 0.03 ~ 0.09 W/mK, compression strength
For 1.0 ~ 15.0MPa, the fields such as wall thermal insulating, fire prevention, sound insulation are can be widely applied to.
It is specific embodiment part below.
Embodiment 1
Basalt fibre felt enhancing SiO is prepared using following steps2Aeroge foamed concrete：
（1）Pending SiO is detected using contact angle measurement2Aerogel powder surface and the contact angle of water, testing result is
55 °, be then 56 μm of SiO by particle diameter2Aerogel powder is positioned in vacuum furnace, with container by the hexamethyl after weighing
Disilazane is positioned in vacuum furnace, heating and gasifying, hydrophobically modified 1.5h, obtains hydrophobic SiO2Aerogel powder, with connecing
Feeler measuring instrument detects hydrophobic SiO2Aerogel powder surface and the contact angle of water, testing result are 147 °；
（2）At room temperature, in mass ratio 1:1:100 weigh ethanol, n-hexane and deionized water, are well mixed, are configured to table
Face hydrophilic modifying solution；
（3）By hydrophobic SiO2The volume ratio 1 of aerogel powder and surface hydrophilic modification solution:3, surface modification solution is weighed, and
Pour into corresponding container, step will be passed through（1）Hydrophobic SiO2Aerogel powder is mixed with surface hydrophilic modification solution, at ball milling
Manage after 25min, take out filtering；
（4）By step（3）Contain the SiO of hydrophilic modifying solution in obtained surface2Aerogel powder is positioned over far infrared drying stove
In, at a temperature of 120 DEG C, 0.5h is dried, furnace cooling is to taking-up after less than 50 DEG C, to SiO2The cross section of aerogel powder is entered
Row detection, testing result shows that surface hydrophilic thickness degree is 7.9 μm；
（5）Step is weighed successively by proportioning（4）Obtained modified SiO2Aerogel powder, 425 Portland cements, it can divide again
Latex powder, hydroxymethyl cellulose, polycarboxylic acids dehydragent, sodium sulphate are dissipated, dry mixed is carried out, obtains dry mixture；
（6）By step（5）Obtained dry mixture adds water carry out wet-mixing, obtains wet compound；
（7）By step（6）Obtained wet compound is mixed with aluminium powder foaming agent, mechanical agitation 5min；Then in 1.5MPa sky
Under atmospheric pressure, above-mentioned wet feed is infiltrated to 150 kg/m3Basalt fibre felt in, foaming, produce basalt fibre felt enhancing
SiO2Aeroge foamed concrete, table 1 is that basalt fibre felt made from the present embodiment strengthens SiO2Aeroge foamed concrete is passed through
Cross the performance indications of 28d standard curings.
The basalt fibre felt enhancing SiO of the embodiment 1 of table 12The performance indications of aeroge foamed concrete
Embodiment 2
Glass mat enhancing SiO is prepared using following steps2Aeroge foamed concrete：
（1）Pending SiO is detected using contact angle measurement2Aerogel powder surface and the contact angle of water, testing result is
45 °, be then 67 μm of SiO by particle diameter2Aerogel powder is positioned in vacuum furnace, with container by the trimethyl after weighing
Chlorosilane is positioned in vacuum furnace, heating and gasifying, hydrophobically modified 1.5h, obtains hydrophobic SiO2Aerogel powder, with contact
Angle measuring instrument detects hydrophobic SiO2Aerogel powder surface and the contact angle of water, testing result are 146 °；
（2）At room temperature, in mass ratio 1:1:1000 weigh sodium sulfate of polyethenoxy ether of fatty alcohol, sodium alkyl benzene sulfonate, just oneself
Alkane and deionized water, are well mixed, are configured to surface hydrophilic modification solution；
（3）By hydrophobic SiO2The volume ratio 1 of aerogel powder and surface hydrophilic modification solution:3, surface modification solution is weighed, and
Pour into corresponding container, step will be passed through（1）Hydrophobic SiO2Aerogel powder is put into the container being made up of screen pack, together
Immerse in surface hydrophilic modification solution, taken out after 2min；
（4）By step（3）Contain the SiO of hydrophilic modifying solution in obtained surface2Aerogel powder is positioned in air dry oven,
At a temperature of 120 DEG C, 0.5h is dried, furnace cooling is to taking-up after less than 50 DEG C, to SiO2The cross section of aerogel powder is carried out
Detection, testing result shows that surface hydrophilic thickness degree is 1.3 μm；
（5）Step is weighed successively by proportioning（4）Obtained modified SiO2Aerogel powder, 425 Portland cements can divide again
Latex powder, hydroxyethyl cellulose, polycarboxylic acids dehydragent, sodium nitrate are dissipated, dry mixed is carried out, obtains dry mixture；
（6）By step（5）Obtained dry mixture adds water carry out wet-mixing, obtains wet compound；
（7）By step（6）Obtained wet compound is mixed with dioxygen water foaming agent, mechanical agitation 2min；
（8）It is 180 kg/m by unit weight3Glass mat be immersed in Silane coupling agent KH550, processing time is 10min,
It is subsequently placed in air dry oven under the conditions of 60 DEG C and dries 1h；
（9）Under vacuum, by step（7）Wet compound infiltration arrive step（8）Glass mat between space in,
Foaming, obtains glass mat enhancing SiO2Aeroge foamed concrete, table 2 strengthens SiO for the glass mat of the present embodiment2
Performance indications of the aeroge foamed concrete Jing Guo 28d standard curings.
The glass mat enhancing SiO of the embodiment 2 of table 22The performance indications of aeroge foamed concrete
Embodiment 3
Polypropylene fibre felt enhancing SiO is prepared using following steps2Aeroge foamed concrete：
（1）The SiO that pending particle diameter is 77 μm is detected using contact angle measurement2Contact of the aerogel powder surface with water
Angle, testing result is 140 °, then the SiO2Aerogel powder has hydrophobicity；
（2）At room temperature, in mass ratio 1:4:10 weigh n-hexane, sodium alkyl benzene sulfonate and deionized water, are well mixed, match somebody with somebody
It is set to surface hydrophilic modification solution；
（3）By hydrophobic SiO2The volume ratio 1 of aerogel powder and surface hydrophilic modification solution:3, surface modification solution is weighed, and
Pour into corresponding container, step will be passed through（1）Hydrophobic SiO2Aerogel powder is put into the container being made up of screen pack, together
Immerse in surface hydrophilic modification solution, taken out after 1min；
（4）By step（3）Contain the SiO of hydrophilic modifying solution in obtained surface2Aerogel powder is positioned over far infrared drying stove
In, at a temperature of 120 DEG C, 0.5h is dried, furnace cooling is to taking-up after less than 50 DEG C, after fractureing, to SiO2Aerogel powder
Cross section is detected that testing result is shown, surface hydrophilic thickness degree is 99.7 μm；
（5）Step is weighed successively by proportioning（4）Obtained modified SiO2Aerogel powder, 425 Portland cements, it can divide again
Latex powder, starch, polycarboxylic acids dehydragent, aluminum sulfate are dissipated, dry mixed is carried out, obtains dry mixture；
（6）By step（5）Obtained dry mixture adds water carry out wet-mixing, obtains wet compound；
（7）By step（6）Obtained wet compound is mixed with ammonium hydrogen carbonate foaming agent, mechanical agitation 2min, then by 100 kg/
m3Polypropylene fibre felt be immersed in 15min in above-mentioned wet compound, foam, produce polypropylene fibre felt enhancing SiO2Aeroge
Foamed concrete, table 3 is that polypropylene fibre felt made from the present embodiment strengthens SiO2Aeroge foamed concrete passes through 28d standards
The performance indications of maintenance.
The polypropylene fibre felt enhancing SiO of the embodiment 3 of table 32The performance indications of aeroge foamed concrete
Embodiment 4
Glass mat enhancing SiO is prepared using following steps2Aeroge foamed concrete：
（1）The SiO that pending particle diameter is 75 μm is detected using contact angle measurement2Contact of the aerogel powder surface with water
Angle, testing result is 141 °, then the SiO2Aerogel powder has hydrophobicity；
（2）At room temperature, in mass ratio 1:0.5:1000 weigh n-hexane, sodium alkyl benzene sulfonate and deionized water, and mixing is equal
It is even, it is configured to surface hydrophilic modification solution；
（3）By hydrophobic SiO2The volume ratio 1 of aerogel powder and surface hydrophilic modification solution:3, surface modification solution is weighed, and
Pour into corresponding container, step will be passed through（1）Hydrophobic SiO2Aerogel powder is put into the container being made up of screen pack, together
Immerse in surface hydrophilic modification solution, taken out after 1min；
（4）By step（3）Contain the SiO of hydrophilic modifying solution in obtained surface2Aeroge sheet material is positioned over far infrared drying stove
In, at a temperature of 120 DEG C, 0.5h is dried, furnace cooling is to taking-up after less than 50 DEG C, to SiO2The cross section of aerogel powder is entered
Row detection, testing result shows that surface hydrophilic thickness degree is 0.1 μm；
（5）Step is weighed successively by proportioning（4）Obtained modified SiO2Aerogel powder, 425 Portland cements, vitreous are micro-
Pearl, redispersable latex powder, hydroxymethyl cellulose, polycarboxylic acids dehydragent, sodium sulphate, organosilicon moisture repellent, carry out dry method and mix
Close, obtain dry mixture；
（6）By step（5）Obtained dry mixture adds water carry out wet-mixing, obtains wet compound；
（7）By step（6）Obtained wet compound is mixed with dioxygen water foaming agent, mechanical agitation 2min；
（8）It is 180 kg/m by unit weight3Glass mat be immersed in Silane coupling agent KH550, processing time is 10min,
It is subsequently placed in air dry oven under the conditions of 60 DEG C and dries 1h；
（9）Under vacuum, by step（7）SiO2Step is arrived in the infiltration of aeroge foamed concrete wet feed（8）Glass fibers
Tie up in the space between felt, foaming, obtain glass mat enhancing SiO2Aeroge foamed concrete.Table 4 is the present embodiment system
The glass mat enhancing SiO obtained2Performance indications of the aeroge foamed concrete Jing Guo 28d standard curings.
The glass mat enhancing SiO of the embodiment 4 of table 42The performance indications of aeroge foamed concrete
Above-described embodiment is not limited for the present invention preferably embodiment, but embodiments of the present invention by above-described embodiment
System, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (10)
1. a kind of fibrofelt strengthens aeroge foamed concrete, it is characterised in that by aerogel powder, foamed concrete and fiber
Felt is constituted, and the aerogel powder is made up of inner hydrophobic layer and surface hydrophilic layer, and the surface hydrophilic thickness degree is 0.1 ~ 100
μm。
2. a kind of fibrofelt enhancing aeroge foamed concrete according to claim 1, it is characterised in that the fibrofelt is
Glass mat, basalt fibre felt, alumina fiber blanket, carbon fiber felt, silicon carbide fibre felt, lignin fibre felt, poly- third
One or more in alkene fibrofelt, vinal felt, polyvinyl chloride fibre felt.
3. a kind of fibrofelt strengthens the preparation method of aeroge foamed concrete, it is characterised in that comprise the following steps：
（1）Aerogel powder is modified；
（2）By step（1）Obtained aerogel powder is dry-mixed with binder materials, and then add water wet mixing；
（3）By step（2）Obtained wet compound is mixed with CBA, stirring；
（4）By step（3）Wet compound infiltrate to fibrofelt, foam.
4. a kind of fibrofelt strengthens the preparation method of aeroge foamed concrete according to claim 3, it is characterised in that institute
State step（1）Including hydrophobically modified step；The hydrophobically modified step is to gas in closed hydrophobic modifier gaseous environment
Gel powder carries out hydrophobically modified；The hydrophobic modifier is trim,ethylchlorosilane, HMDS, the silica of hexamethyl two
Alkane, MTMS, MTES, dimethyldimethoxysil,ne, dimethyldiethoxysilane,
γ-aminopropyltrimethoxysilane, gamma-aminopropyl-triethoxy-silane, γ-（The oxygen of 2,3- epoxies third）Propyl trimethoxy silicon
Alkane, γ-methacryloxypropyl trimethoxy silane, N-（β-aminoethyl）One in-gamma-aminopropyl-triethoxy-silane
Plant or a variety of.
5. a kind of fibrofelt strengthens the preparation method of aeroge foamed concrete according to claim 3, it is characterised in that institute
State step（1）Also include surface hydrophilic modification step；The surface hydrophilic modification step is to use surface hydrophilic modification solution pair
Hydrophobic aerogel powder surface is modified；The surface hydrophilic modification solution is surfactant and low surface tension solvent
The aqueous solution of the aqueous solution or low surface tension solvent；The surfactant is anionic surfactant, cationic table
One or more in face activating agent, amphoteric surfactant, nonionic surface active agent；The anionic surface activity
Agent is fatty alcohol phosphates, aliphatic alcohol polyoxyvinethene phosphate salt, alkyl sulfate, AEO sulfuric acid
Salt, fatty acid glyceride sulfate, sulphation ricinoleate, cycloalkanes sulfate, fatty acid amide alkyl sulfate, alkyl benzene sulphonate
Salt, alkylsulfonate, fatty acid methyl ester ethoxylate sulfonate, MES, AEO carboxylic
One or more in hydrochlorate；The cationic surface active agent is aliphatic ammonium salt；The amphoteric surfactant is alkane
One or more in base amino acid, carboxylic acid group's glycine betaine, sulfobetaines, phosphate glycine betaine, alkyl hydroxy amine oxide；Institute
Nonionic surface active agent is stated for aliphatic polyester, APES, high-carbon fatty alcohol polyoxyethylene ether, aliphatic acid
Polyoxyethylene ester, fatty acid methyl ester ethoxylate, oxireme addition product, sorbitan ester, the Sucrose Fatty Acid Ester of polypropylene glycol
One or more in fat acid esters, alkyl esteramides；The low surface tension solvent is acetone, n-hexane, pentane, positive heptan
One or more in alkane, ethanol, isopropanol, the tert-butyl alcohol, propane diols, glycerine.
6. a kind of fibrofelt strengthens the preparation method of aeroge foamed concrete according to claim 5, it is characterised in that institute
State in surface hydrophilic modification step, in addition to additional physical field action step；The additional physical field action step is far infrared
One kind in radiation, stirring, ultrasonication, ball milling.
7. a kind of fibrofelt strengthens the preparation method of aeroge foamed concrete according to claim 3, it is characterised in that institute
State step（1）Also include drying process step；The drying process step be far-infrared ray drying, spray drying, microwave drying, often
Press dry one kind in dry, supercritical drying, subcritical drying, freeze-drying.
8. a kind of fibrofelt strengthens the preparation method of aeroge foamed concrete according to claim 3, it is characterised in that institute
State step（2）And/or step（3）In can also add phase-changing energy storage material, lightweight aggregate, admixture, fiber, fire retardant, wood powder,
One or more in additive；The phase-changing energy storage material for microcapsule coated inorganic water and salt, higher aliphatic hydrocarbon, polynary
One or more in alcohol, multi-hydroxy carboxy acid；The lightweight aggregate is clinker, expanded vermiculite, expanded perlite, glass bead, light
Sand, polyurethane foam particles, the one or more of polystyrene foam particles；The admixture is adding calcium fly ash, II grade of powder
One or more in coal ash, silicon ash, ground slag powder, phosphorus slag powder；The fire retardant is one in magnesium hydroxide, aluminium hydroxide
Plant or two kinds；The additive is the surfactant, water reducer, hydrophober, coagulant, retarder, thickener, foam stabilizing
One or more in agent, preservative；The water reducer is polycarboxylic acids dehydragent, lignin sulfonic acid sodium salt water reducer, naphthalene system
One or more in water reducer, aliphatic water reducing agent, amino water reducer；The hydrophober is hard sulfonate hydrophober, organic
One or more in silicon hydrophober；The coagulant be sodium metasilicate, aluminum sulfate, sodium nitrate, calcium nitrate, sodium sulphate, sodium carbonate,
One or more in lithium carbonate；The retarder be citric acid, sodium polyphosphate, bone glue protein, borax in one kind or
It is a variety of；The thickener is methylcellulose, ethyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, bentonite, hard charcoal
One or more in black, starch；The foam stabilizer is polyacrylamide, polyvinyl alcohol, silicones polyethers emulsion, dodecyl
One or more in dimethyl amine, alkylolamides；The preservative is 1,2- benzisothiazole-3-ketones, 5- is chloro-
MIT, MIT, 1,3,5- tri- (2- ethoxys) s-triazine, hexahydro-
One or more in 1,3,5- triethyl groups-triazine.
9. a kind of fibrofelt strengthens the preparation method of aeroge foamed concrete according to claim 3, it is characterised in that institute
Binder materials is stated for portland cement, aluminate cement, sulphate aluminium cement, magnesia oxychloride cement, gypsum, lime, waterglass, third
One or more in olefin(e) acid resin, polyurethane resin, epoxy resin, organic siliconresin, fluorocarbon resin.
10. a kind of fibrofelt strengthens the preparation method of aeroge foamed concrete according to claim 3, it is characterised in that
The CBA is in dioxygen water foaming agent, ammonium hydrogen carbonate foaming agent, azodicarbonamide foaming agent, aluminium powder foaming agent
It is one or more.
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| CN111535019A (en) * | 2020-04-21 | 2020-08-14 | 浙江岩谷科技有限公司 | Preparation method of hydrophobic glass fiber felt-silica aerogel heat insulation composite material |
| CN111673941A (en) * | 2020-06-10 | 2020-09-18 | 江西富上美科技有限公司 | Plastic master batch preparation process |
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| CN113563018A (en) * | 2021-08-25 | 2021-10-29 | 四川谦宜复合材料有限公司 | Basalt fiber wet felt facing material and preparation method thereof |
| CN114957783A (en) * | 2022-05-30 | 2022-08-30 | 陕西科技大学 | Inorganic fiber composite foam material and preparation method thereof |
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