CN102585274A - Method for preparing bagasse pith water-absorbing sponge material - Google Patents
Method for preparing bagasse pith water-absorbing sponge material Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000010905 bagasse Substances 0.000 title abstract description 8
- 241000609240 Ambelania acida Species 0.000 title abstract description 7
- 239000000243 solution Substances 0.000 claims abstract description 49
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 42
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
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- 239000011259 mixed solution Substances 0.000 claims abstract description 18
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- 239000002250 absorbent Substances 0.000 claims description 30
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- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000011148 porous material Substances 0.000 claims description 19
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 17
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention discloses a method for preparing a bagasse pith water-absorbing sponge material. The method comprises the following steps of: pre-treating bagasse pith by using a mixed solution of hydrogen peroxide and glacial acetic acid; dissolving the obtained bagasse pith glycan macromolecules into an aqueous phase non-derivative biochemical solution sodium thiocyanate; performing proper plasticizing and crosslinking reaction to obtain the bagasse pith water-absorbing sponge material. The bagasse pith glycan macromolecular sponge material prepared by the method is white and porous, the plasticity and the mechanical strength are enhanced, the using performance and the durability are improved, the distilled water absorbing rate reaches 7.0-21.0g/g, the tensile strength of the material is 0.18-0.25MPa, and the tearing strength is 0.15-0.20KN/m.
Description
Technical field
The present invention relates to a kind of preparation method of sugarcane marrow water-absorbent sponge material, specifically is to utilize natural glycan polymer in the sugarcane marrow to prepare the Technology of water-absorbent sponge material, belongs to the natural macromolecular material field.
Background technology
Polystyrene foam and polyurethane sponge are to use commonplace porous water-absorbing property material in industrial or agricultural and the daily life.This series products production power consumption is higher, and the waste difficult degradation, and during especially for human body health, home washings and skincare product, contact over a long time will produce certain negative impact to human body.Along with the continuous minimizing of this type of oil Nonrenewable resources, the source of this raw material has also become the problem of a sternness.Along with the continuous propelling and the reinforcement of Sustainable development scientific research, the substitute of oil sponge is much accounted of gradually.Wherein natural phant glycan polymer sponge, especially cellulose sponge is exactly one of the surrogate comparatively rapidly of scientific domain development now.Textile plant glycan polymer is the most general a kind of natural resource of occurring in nature, wide material sources not only, and can be through photosynthesis constantly " regeneration ".The glycan macromolecular material mainly comprises Mierocrystalline cellulose and semicellulose in the textile plant, and wherein content of cellulose is higher.Mierocrystalline cellulose is β, and D-glucopyranose base is by 1, and the 4-glycosidic link links the straight chain polymer polymkeric substance that forms.Semicellulose then is the high molecular general name of the glucide of non-cellulose in the plant fiber material, and is different with Mierocrystalline cellulose, and half fiber is not the homogeneous glycan, but the general name of a group complex plycan, according to the difference of plant material, the component of complex plycan is also different.Sugarcane belongs to grass, so its contained semicellulose is main with araban 4-O-methyl glucose uronic acid wood sugar mainly.Plant glycan sponge has not only continued Mierocrystalline cellulose and semicellulose and has been easy to the characteristic of degrading under field conditions (factors), and made cellulose sponge absorbent and lyophily performance are stronger, are a kind of environmentally friendly macromolecular materials.
Of paramount importance link is dissolved the glycan polymer exactly in the technology of producing the glycan sponge, especially the higher Mierocrystalline cellulose of percent crystallinity.Can Mierocrystalline cellulose dissolve the power that is concerning follow-up plasticizing crosslinking reaction performance fully under the situation of seldom degraded, and can the pore-forming shaping effect of sponge material successful.Mierocrystalline cellulose is by the straight chain natural polymers that β-the D-glucopyranose is constituted, and therefore has a large amount of hydroxyls.Can form hydrogen bond between hydroxyl and the hydroxyl and connect, the fine and close zone of those marshallings has just formed the Mierocrystalline cellulose crystallizing field, and arranging comparatively loose zone at random then is the Mierocrystalline cellulose pars amorpha.Just because of the existence of crystallizing field, Mierocrystalline cellulose is difficult to dissolved in most of polar solvent, and when particularly the polymerization degree was higher, such as gossypin, dissolving is difficulty more.At present, the solvent of dissolving cellulos can be divided into derivatize solvent and non-derivative solvent, and wherein the non-derivative solvent can be divided into water non-derivative solvent and nonaqueous phase derivatize solvent again.The derivatize solvent needs to introduce new functional group through covalent linkage in the process of dissolving cellulos, and form cellulose intermediate product, thereby destroy the hydrogen bond of Mierocrystalline cellulose hydrogen bond, especially crystallizing field, thus dissolving cellulos.And the non-derivative solvent is mainly through the effect of intermolecular dipolar forces, and chemical reaction does not take place between Mierocrystalline cellulose and solvent the physical dissolution Mierocrystalline cellulose.Therefore, analyze from dissolution process, non-derivative dissolution with solvents cellulose steps is comparatively succinct, simple to operate, is easy to control.Alkali aqueous solution system medicine is cheap and easy to get in the non-derivative dissolution system, and Application Research is more, and system is ripe; And inorganic metal fused salt hydrate, Sodium Thiocyanate 99 for example can dissolve the DP value up to 1500 Mierocrystalline cellulose, and dissolving power is strong.
In the preparation process of plant glycan sponge, need to add each item performance that multiple auxiliary agent promotes material, wherein indispensable is softening agent.The material of softening agent normally a kind of " kind solvent " joins the processibility that enables to improve material in plastics, resin or other high molecular polymers, increases plasticity-, snappiness, stretchiness or expansile material.The kind of softening agent is comparatively various, for example benzoates, aliphatic dibasic acid ester, polyol ester class, sulfonamides or the like.The action principle of softening agent can be summarized as 2 points: the first, and effect is a physical bond between softening agent and the macromolecular material that is added, i.e. the dipole magnetism of two kinds of compound functional groups is through the plasticising polymer composite of this reactive force be combined into; The second, softening agent passes through chemical reaction with the high molecular polymer that is added, and through generating new covalent linkage both is linked into an integrated entity, and often this chemical plasticizing agent is called reactive plasticizer, and this chemical reaction belongs to the category of crosslinking reaction.Reactive plasticizer is high than physics softening agent cost, but the polymer phase capacitive with crosslinked is good after the plastification, and the weather resistance of material is stronger after the plasticising, and softening agent is not volatile, and migration does not take place in long-time use can stripping yet.
Waste material as sugar industry---bagasse is through removing the production that is mainly used in pulping and paper-making after marrow is handled.Yet the sugarcane marrow that accounts for raw material 20 ~ 30% is still very low as the present utilization ratio of the sub product of bagasse, is mainly used in burning according to reading up the literature sugarcane marrow and reclaims aspects such as heat energy, edible robust fibre additive, preparing ethanol by fermentation, furfural and wood sugar.Can know that according to these laboratory gained sugarcane marrow material chemical component data holocellulose content accounts for more than 60% of total component, be the main composition composition of sugarcane marrow, from the feasibility of the clear sugarcane marrow of material composition Shanghai Stock Exchange as the glycan sponge material.But still contain the lignin about 20% in the sugarcane marrow; This composition is because of complex structure; And have hydrophobic interaction, hinder the absorbent of cellulose dissolution and sponge product, so before dissolving sugarcane marrow and under the prerequisite of avoiding holocellulose to degrade as far as possible, must effectively remove major part or whole lignin.
Research at the water-absorbent sponge material that is the basis with the sugarcane marrow still is under the prerequisite of blank out; Sugarcane marrow glycan polymer is used to prepare the water-absorbent porous material; The sugarcane marrow is fully utilized, and has opened up a brand-new road for the high added value development and utilization of sugarcane marrow.
Summary of the invention
The present invention aims to provide a kind of preparation method of sugarcane marrow water-absorbent sponge material; For urethane and the polystyrene type plastic sponge absorbent products that replaces difficult degradation; Utilize aboundresources and degradable sugaring and paper industry by product--the sugarcane marrow prepares that sponge sucks in water material; For the glycan high molecular component that effectively develops in the sugarcane marrow provides a new high added value road, prepare the more excellent environmental protection water-absorbent sponge material of each item imbibition index.
For realizing the object of the invention, the process technology scheme of taking is following:
(1) with pretreatment fluid the sugarcane marrow is carried out pre-treatment,, with washed with de-ionized water and dry, make sugarcane marrow glycan macromolecule mixture--Mierocrystalline cellulose and semicellulose raw material then to remove xylogen and other the non-polyose components in the raw material;
(2) with water non-derivative solution Sodium Thiocyanate 99 (NaSCN) aqueous solution pretreated sugarcane marrow is carried out dissolution process;
(3) adopt aqueous solution polymerization method, add initiator and response type fluidizer in the sugarcane marrow solution after dissolving, carry out response type plasticizing reaction---promptly select for use ammonium persulphate as the oxidation initiator system, with N, N
,-methylene-bisacrylamide is that fluidizer is accomplished;
(4) add pore former in the sugarcane marrow solution after plasticizing, after stirring, in mould, carry out cryogenic forming; Putting into the sulfuric acid precipitation bath then regenerates; After treating most of inorganic salt and unreacted fluidizer stripping, put into clear water and clean, dry, obtain sugarcane marrow water-absorbent sponge material.
Concrete technical scheme of the present invention is following:
(1) adopt hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution that the sugarcane marrow is carried out pre-treatment; In the sugarcane marrow, add hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution; The concentration of sugarcane marrow in pretreatment fluid is 5～15wt%, handles 4～72h down at 40～75 ℃ then, and last deionized water is clear and dry;
(2) sodium thiocyanate water solution with 48～60wt% carries out dissolution process to pretreated sugarcane marrow at 30～100 ℃, and sugarcane marrow concentration is 1～8wt% in the lysate;
(3) add initiator ammonium persulfate and fluidizer N, N in the sugarcane marrow solution after dissolving
,-methylene-bisacrylamide under 30～80 ℃, reacts 4.5～15h behind the mixing, and wherein the mass ratio of over dry sugarcane marrow is 0.005～0.025:1 in ammonium persulphate addition and the solution, N, N
,The mass ratio of over dry sugarcane marrow is 0.002～0.02:1 in-methylene-bisacrylamide addition and the solution;
(4) add pore former sodium sulfate (fine grinding and dried sodium sulfate powder) in the sugarcane marrow solution after plasticizing, over dry sugarcane marrow mass ratio was 8～16:1 during the pore former addition reacted with plasticizing, after stirring; Put into mould at-5～0 ℃ of compacted under 0.5～4d; Put into 40～90 ℃ of sulfuric acid precipitation bath then, solidify 0.75～3h, put at last clear water clean to the pH value be 6.0～8.0; 35～50 ℃ of oven dry, obtain sugarcane marrow water-absorbent sponge material at last.
Pretreatment fluid described in the present invention is that 1～8:1 is mixed by volume for hydrogen peroxide and Glacial acetic acid min. 99.5.
What use in the precipitation bath of sulfuric acid described in the present invention is the sulphuric acid soln of 10～15wt%, and adds 150～300 g/L sodium sulfate therein.
Mould specification described in the present invention is thickness 0.5～1.0cm, length 5～8cm, width 3～6cm.
The present invention utilizes Glacial acetic acid min. 99.5/hydrogen peroxide pretreatment process to remove the lignin in the sugarcane marrow raw material, is intended to prepare qualified sugarcane marrow glycan raw material; And, adopt wetting ability reactive plasticizer--N, N according to the water absorption character of the continuous material of sugarcane brain
,-methylene-bisacrylamide; According to sugarcane marrow cellulosic degree of polymerization and crystallization degree, select for use the stronger inorganic metal fused salt hydrate of solubility property as the sucrose cellosolve.
The invention has the beneficial effects as follows: the sugarcane marrow glycan polymer after purifying through hydrogen peroxide/Glacial acetic acid min. 99.5 pre-treatment suitably plastifies crosslinking reaction again and makes sugarcane marrow suction type sponge material through the dissolving of water non-derivative sodium thiocyanate solution.Through above-mentioned technical process; The plasticity of this material and mechanical strength are able to strengthen; Strengthened use properties and the endurance quality of sponge, the sugarcane marrow glycan polymer sponge material that makes through the inventive method vesicular that is white in color is inhaled the zero(ppm) water multiplying power and is reached 7.0～21.0 g/g; The tensile strength of material is 0.18～0.25 MPa, and tear strength is 0.15～0.20 KN/m.The method that this patent proposed combines pulping and paper-making, Mierocrystalline cellulose porous sponge material and three kinds of industry field knowledge of high-hydroscopicity hydrogel material first, inquires into out the ME of the plain sponge of novel biodegradable fiber.Wherein having utilized pulp and paper industry to be difficult to the waste of high value added utilization---the sugarcane marrow is as the raw material of patent of the present invention; And improved the method for this field test paper making raw material fibre shape; Xylogen in the sugarcane marrow is removed, extracted the holocellulose composition.In addition, patent of the present invention is used sodium thiocyanate water solution dissolution process sugarcane marrow holocellulose first in cellulose sponge manufacturing field; And in the holocellulose aqueous solution; The plasticizing reaction takes place in homogeneous phase, strengthens each item mechanical property of sponge, increases the work-ing life of material.
Embodiment
Through embodiment the present invention is done further explain below, but protection domain of the present invention is not limited to said content.
Embodiment 1: the preparation method of this sugarcane marrow water-absorbent sponge material, and concrete operations are following:
(1) adopt hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution (hydrogen peroxide: Glacial acetic acid min. 99.5=1:1) the sugarcane marrow is carried out pre-treatment, interpolation hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution in the sugarcane marrow, the concentration of sugarcane marrow in mixed solution is 10wt%; After handling 48h under 60 ℃; The pH value of washed with de-ionized water to scavenging solution is neutral, 40 ℃ of oven dry down in baking oven, and pretreated sugarcane marrow yield is 70.3%; Acid insoluble lignin content is 0.92%, and Mierocrystalline cellulose and hemicellulose level are 98.53%;
(2) sodium thiocyanate water solution with 48wt% carries out dissolution process to pretreated sugarcane marrow glycan macromolecule mixture at 50 ℃, and sugarcane marrow concentration is 5wt% in the lysate, constantly stirs through mechanical stirrer, till the sugarcane marrow dissolves fully;
(3) add initiator ammonium persulfate and fluidizer N, N in the sugarcane marrow solution after dissolving
,-methylene-bisacrylamide under 65 ℃, reacts 4.5h behind the mixing, and the mass ratio of over dry sugarcane marrow is 0.01:1 in ammonium persulphate addition and the solution, N, N
,The mass ratio of over dry sugarcane marrow is 0.008:1 in-methylene-bisacrylamide addition and the solution;
The synthetic step of concrete graft copolymerization is: take by weighing N, N
,-methylene-bisacrylamide is put into three mouthfuls of reaction flasks that sugarcane marrow lysate is housed, and there-necked flask is put into the water-bath of constant temperature (65 ℃), starts whipping appts, and in the prolong water flowing condensation of crawling of an end device of there-necked flask, the other end feeds N
2, logical N
2Behind 30 min, in reaction vessel, add showing of ammonium persulphate and join solution, and the opening entry plasticizing reaction times, react to 4.5h the plasticizing reaction terminating;
(4) pore former sodium sulfate is put into 105 ℃ of oven for drying 24 hours through after grind disperseing, after the dry sodium sulfate of crossing is put into moisture eliminator internal cooling 30 min, put into the sugarcane marrow solution after the plasticizing; Mechanical stirring is even, and over dry sugarcane marrow mass ratio was 11:1 during the pore former addition reacted with plasticizing, after stirring; The mould of putting into thickness 0.6cm, length 8cm, width 5cm is at-2 ℃ of compacted under 2d; Put into 65 ℃ of sulfuric acid precipitation bath then, solidify 1.5h, what use in the precipitation bath is the sulphuric acid soln of 10wt%; And add 200 g/L sodium sulfate therein; Put at last clear water clean to the pH value be 6.0, put into 50 ℃ of oven dry of baking oven, obtain sugarcane marrow water-absorbent sponge material.
(5) examination criteria and the performance of the continuous material of sugarcane brain
Absorptive mensuration is measured the water-absorbent of paper and cardboard according to the GB/T461.3-1989 flooding method; The mensuration of tensile strength is according to the soft pore polymer material of ISO1798-1983---tensile strength and elongation at break measuring method; The mensuration of tear strength is according to GB10808-89 flex foam tear resistance measuring method;
Material through the inventive method preparation vesicular that is white in color, through measuring, the suction zero(ppm) water multiplying power of the continuous material of sugarcane brain reaches 21. 0 g/g, and the tensile strength of material is 0.20 MPa, and tear strength is 0.17 KN/m.
Embodiment 2: the preparation method of this sugarcane marrow water-absorbent sponge material, and concrete operations are following:
(1) adopt hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution (hydrogen peroxide: Glacial acetic acid min. 99.5=3:1) the sugarcane marrow is carried out pre-treatment, interpolation hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution in the sugarcane marrow, the concentration of sugarcane marrow in mixed solution is 8wt%; After handling 4h under 75 ℃; The pH value of washed with de-ionized water to scavenging solution is neutral, 40 ℃ of oven dry down in baking oven, and the yield of pretreated sugarcane marrow is 64.2%; Acid insoluble lignin content is 0.30%, and Mierocrystalline cellulose and hemicellulose level are 99.16%;
(2) sodium thiocyanate water solution with 55wt% carries out dissolution process to pretreated sugarcane marrow glycan macromolecule mixture at 40 ℃, and sugarcane marrow concentration is 8wt% in the lysate, constantly stirs through mechanical stirrer, till the sugarcane marrow dissolves fully;
(3) add initiator ammonium persulfate and fluidizer N, N in the sugarcane marrow solution after dissolving
,-methylene-bisacrylamide under 35 ℃, reacts 15h behind the mixing, and the mass ratio of over dry sugarcane marrow is 0.025:1 in ammonium persulphate addition and the solution, N, N
,The mass ratio of over dry sugarcane marrow is 0.02:1 in-methylene-bisacrylamide addition and the solution;
The synthetic step of concrete graft copolymerization is: take by weighing N, N
,-methylene-bisacrylamide is put into three mouthfuls of reaction flasks that sugarcane marrow lysate is housed, and there-necked flask is put into the water-bath of constant temperature (35 ℃), starts whipping appts, and in the prolong water flowing condensation of crawling of an end device of there-necked flask, the other end feeds N
2, logical N
2Behind 40 min, in reaction vessel, add showing of ammonium persulphate and join solution, and the opening entry plasticizing reaction times, react to 15h the plasticizing reaction terminating;
(4) pore former sodium sulfate is put into 105 ℃ of oven for drying 24 hours through after grind disperseing, after the dry sodium sulfate of crossing is put into moisture eliminator internal cooling 30 min, put into the sugarcane marrow solution after the plasticizing; Mechanical stirring is even, and over dry sugarcane marrow mass ratio was 16:1 during the pore former addition reacted with plasticizing, after stirring; The mould of putting into thickness 1.0cm, length 8cm, width 6cm is at-5 ℃ of compacted under 1d; Put into 85 ℃ of sulfuric acid precipitation bath then, solidify 0.75h, what use in the precipitation bath is the sulphuric acid soln of 15wt%; And add 300 g/L sodium sulfate therein; Put at last clear water clean to the pH value be 7.5, put into 40 ℃ of oven dry of baking oven, obtain sugarcane marrow water-absorbent sponge material.
(5) examination criteria and the performance of the continuous material of sugarcane brain
Absorptive mensuration is measured the water-absorbent of paper and cardboard according to the GB/T461.3-1989 flooding method; The mensuration of tensile strength is according to the soft pore polymer material of ISO1798-1983---tensile strength and elongation at break measuring method; The mensuration of tear strength is according to GB10808-89 flex foam tear resistance measuring method;
Material through the inventive method preparation vesicular that is white in color, through measuring, the suction zero(ppm) water multiplying power of the continuous material of sugarcane brain reaches 7.0 g/g, and the tensile strength of material is 0.25 MPa, and tear strength is 0.20 KN/m.
Embodiment 3:The preparation method of this sugarcane marrow water-absorbent sponge material, concrete operations are following:
(1) adopt hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution (hydrogen peroxide: Glacial acetic acid min. 99.5=8:1) the sugarcane marrow is carried out pre-treatment, interpolation hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution in the sugarcane marrow, the concentration of sugarcane marrow in mixed solution is 15wt%; After handling 72h under 40 ℃; The pH value of washed with de-ionized water to scavenging solution is neutral, 40 ℃ of oven dry down in baking oven, and the yield of pretreated sugarcane marrow is 77.2%; Acid insoluble lignin content is 1.73%, and Mierocrystalline cellulose and hemicellulose level are 97.10%;
(2) sodium thiocyanate water solution with 60wt% carries out dissolution process to pretreated sugarcane marrow solution at 30 ℃, and sugarcane marrow concentration is 1wt% in the lysate, constantly stirs through mechanical stirrer, till the sugarcane marrow dissolves fully;
(3) add initiator ammonium persulfate and fluidizer N, N in the sugarcane marrow solution after dissolving
,-methylene-bisacrylamide under 80 ℃, reacts 10h behind the mixing, and the mass ratio of over dry sugarcane marrow is 0.005:1 in ammonium persulphate addition and the solution, N, N
,The mass ratio of over dry sugarcane marrow is 0.002:1 in-methylene-bisacrylamide addition and the solution;
The synthetic step of concrete graft copolymerization is: take by weighing N, N
,-methylene-bisacrylamide is put into three mouthfuls of reaction flasks that sugarcane marrow lysate is housed, and there-necked flask is put into the water-bath of constant temperature (80 ℃), starts whipping appts, and in the prolong water flowing condensation of crawling of an end device of there-necked flask, the other end feeds N
2, logical N
2Behind 30 min, in reaction vessel, add showing of ammonium persulphate and join solution, and the opening entry plasticizing reaction times, react to 10h the plasticizing reaction terminating;
(4) pore former sodium sulfate is put into 105 ℃ of oven for drying 24 hours through after grind disperseing, after the dry sodium sulfate of crossing is put into moisture eliminator internal cooling 30 min, put into the sugarcane marrow solution after the plasticizing; Mechanical stirring is even, and over dry sugarcane marrow mass ratio was 8:1 during the pore former addition reacted with plasticizing, after stirring; The mould of putting into thickness 0.8cm, length 7cm, width 5cm is at 0 ℃ of compacted under 4d; Put into 40 ℃ of sulfuric acid precipitation bath then, solidify 3h, what use in the precipitation bath is the sulphuric acid soln of 12wt%; And add 150 g/L sodium sulfate therein; Put at last clear water clean to the pH value be 8.0, put into 35 ℃ of oven dry of baking oven, obtain sugarcane marrow water-absorbent sponge material.
(5) examination criteria and the performance of the continuous material of sugarcane brain
Absorptive mensuration is measured the water-absorbent of paper and cardboard according to the GB/T461.3-1989 flooding method; The mensuration of tensile strength is according to the soft pore polymer material of ISO1798-1983---tensile strength and elongation at break measuring method; The mensuration of tear strength is according to GB10808-89 flex foam tear resistance measuring method;
Material through the inventive method preparation vesicular that is white in color, through measuring, the suction zero(ppm) water multiplying power of the continuous material of sugarcane brain reaches 17. 5 g/g, and the tensile strength of material is 0.18 MPa, and tear strength is 0.15 KN/m.
Embodiment 4:The preparation method of this sugarcane marrow water-absorbent sponge material, concrete operations are following:
(1) adopt hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution (hydrogen peroxide: Glacial acetic acid min. 99.5=5:1) the sugarcane marrow is carried out pre-treatment, interpolation hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution in the sugarcane marrow, the concentration of sugarcane marrow in mixed solution is 5wt%; After handling 2h under 75 ℃; The pH value of washed with de-ionized water to scavenging solution is neutral, 40 ℃ of oven dry down in baking oven, and the yield of pretreated sugarcane marrow is 77.2%; Acid insoluble lignin content is 1.73%, and Mierocrystalline cellulose and hemicellulose level are 97.10%;
(2) sodium thiocyanate water solution with 50wt% carries out dissolution process to pretreated sugarcane marrow solution at 100 ℃, and sugarcane marrow concentration is 7wt% in the lysate, constantly stirs through mechanical stirrer, till the sugarcane marrow dissolves fully;
(3) add initiator ammonium persulfate and fluidizer N, N in the sugarcane marrow solution after dissolving
,-methylene-bisacrylamide under 30 ℃, reacts 15h behind the mixing, and the mass ratio of over dry sugarcane marrow is 0.02:1 in ammonium persulphate addition and the solution, N, N
,The mass ratio of over dry sugarcane marrow is 0.01:1 in-methylene-bisacrylamide addition and the solution;
The synthetic step of concrete graft copolymerization is: take by weighing N, N
,-methylene-bisacrylamide is put into three mouthfuls of reaction flasks that sugarcane marrow lysate is housed, and there-necked flask is put into the water-bath of constant temperature (30 ℃), starts whipping appts, and in the prolong water flowing condensation of crawling of an end device of there-necked flask, the other end feeds N
2, logical N
2Behind 30 min, in reaction vessel, add showing of ammonium persulphate and join solution, and the opening entry plasticizing reaction times, react to 15h the plasticizing reaction terminating;
(4) pore former sodium sulfate is put into 105 ℃ of oven for drying 24 hours through after grind disperseing, after the dry sodium sulfate of crossing is put into moisture eliminator internal cooling 30 min, put into the sugarcane marrow solution after the plasticizing; Mechanical stirring is even, and over dry sugarcane marrow mass ratio was 14:1 during the pore former addition reacted with plasticizing, after stirring; The mould of putting into thickness 0.5cm, length 5cm, width 3cm was-3 ℃ of compacted unders 0.5 day; Put into 90 ℃ of sulfuric acid precipitation bath then, solidify 1h, what use in the precipitation bath is the sulphuric acid soln of 13wt%; And add 250 g/L sodium sulfate therein; Put at last clear water clean to the pH value be 7.0, put into 45 ℃ of oven dry of baking oven, obtain sugarcane marrow water-absorbent sponge material.
(5) examination criteria and the performance of the continuous material of sugarcane brain
Absorptive mensuration is measured the water-absorbent of paper and cardboard according to the GB/T461.3-1989 flooding method; The mensuration of tensile strength is according to the soft pore polymer material of ISO1798-1983---tensile strength and elongation at break measuring method; The mensuration of tear strength is according to GB10808-89 flex foam tear resistance measuring method;
Material through the inventive method preparation vesicular that is white in color, through measuring, the suction zero(ppm) water multiplying power of the continuous material of sugarcane brain reaches 19.1 g/g, and the tensile strength of material is 0.2 MPa, and tear strength is 0.17 KN/m.
Claims (4)
1. the preparation method of a sugarcane marrow water-absorbent sponge material is characterized in that carrying out as follows:
(1) with pretreatment fluid the sugarcane marrow is carried out pre-treatment, then with washed with de-ionized water and dry;
(2) with sodium thiocyanate water solution pretreated sugarcane marrow is carried out dissolution process;
(3) add initiator and response type fluidizer in the sugarcane marrow solution after dissolving, carry out response type plasticizing reaction;
(4) add pore former in the sugarcane marrow solution after plasticizing, after stirring, in mould, carry out cryogenic forming, put into the sulfuric acid precipitation bath then and regenerate, put into clear water at last and clean, dry, obtain sugarcane marrow water-absorbent sponge material.
2. by the preparation method of the described sugarcane marrow of claim 1 water-absorbent sponge material, it is characterized in that concrete operations are following:
(1) adopt hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution that the sugarcane marrow is carried out pre-treatment; In the sugarcane marrow, add hydrogen peroxide and Glacial acetic acid min. 99.5 mixed solution; The concentration of sugarcane marrow in mixed solution is 5～15wt%, and after handling 4～72h under 40～75 ℃, washed with de-ionized water is also dry;
(2) sodium thiocyanate water solution with 48～60wt% carries out dissolution process to pretreated sugarcane marrow at 30～100 ℃, and sugarcane marrow concentration is 1～8wt% in the lysate;
(3) add initiator ammonium persulfate and fluidizer N, N in the sugarcane marrow solution after dissolving
,-methylene-bisacrylamide under 30～80 ℃, reacts 4.5～15h behind the mixing, and the mass ratio of over dry sugarcane marrow is 0.005～0.025:1 in ammonium persulphate and the solution, N, N
,The mass ratio of over dry sugarcane marrow is 0.002～0.02:1 in-methylene-bisacrylamide and the solution;
(4) add pore former sodium sulfate in the sugarcane marrow solution after plasticizing, over dry sugarcane marrow mass ratio was 8～16:1 during pore former reacted with plasticizing, after stirring; Put into mould at-5～0 ℃ of compacted under 0.5～4d; Put into 40～90 ℃ of sulfuric acid precipitation bath then, solidify 0.75～3h, put at last clear water clean to the pH value be 6.0～8.0; 35～50 ℃ of oven dry, obtain sugarcane marrow water-absorbent sponge material at last.
3. the preparation method of sugarcane marrow water-absorbent sponge material according to claim 2 is characterized in that: pretreatment fluid is that 1～8:1 is mixed by volume for hydrogen peroxide and Glacial acetic acid min. 99.5.
4. the preparation method of sugarcane marrow water-absorbent sponge material according to claim 2 is characterized in that: what use in the sulfuric acid precipitation bath is the sulphuric acid soln of 10～15wt%, and adds 150～300 g/L sodium sulfate therein.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004521A (en) * | 2014-05-15 | 2014-08-27 | 昆明理工大学 | Preparation method of bagasse pith nanometer cellulose-based composite water-retaining agent |
| CN104557345A (en) * | 2014-12-30 | 2015-04-29 | 昆明理工大学 | Preparation method of hydrogel for nitrogenous fertilizer |
| CN107033392A (en) * | 2017-03-28 | 2017-08-11 | 常州大学 | A kind of high preparation method for receiving dirty cleaning sponge |
| CN109776868A (en) * | 2019-01-20 | 2019-05-21 | 王忠良 | A kind of environment-friendly type sponge material preparation method |
| CN113527868A (en) * | 2021-08-18 | 2021-10-22 | 漳平市国联玩具礼品有限公司 | Preparation method of environment-friendly plastic toy product |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85101499A (en) * | 1985-04-01 | 1987-01-31 | 沈国镇 | Produce the production process of synthetic by lignocellulosic materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN85101499A (en) * | 1985-04-01 | 1987-01-31 | 沈国镇 | Produce the production process of synthetic by lignocellulosic materials |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004521A (en) * | 2014-05-15 | 2014-08-27 | 昆明理工大学 | Preparation method of bagasse pith nanometer cellulose-based composite water-retaining agent |
| CN104557345A (en) * | 2014-12-30 | 2015-04-29 | 昆明理工大学 | Preparation method of hydrogel for nitrogenous fertilizer |
| CN104557345B (en) * | 2014-12-30 | 2017-02-22 | 昆明理工大学 | Preparation method of hydrogel for nitrogenous fertilizer |
| CN107033392A (en) * | 2017-03-28 | 2017-08-11 | 常州大学 | A kind of high preparation method for receiving dirty cleaning sponge |
| CN109776868A (en) * | 2019-01-20 | 2019-05-21 | 王忠良 | A kind of environment-friendly type sponge material preparation method |
| CN113527868A (en) * | 2021-08-18 | 2021-10-22 | 漳平市国联玩具礼品有限公司 | Preparation method of environment-friendly plastic toy product |
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