CN109809416A - Barium sulfate-barium silicate-aerosil multilayer heat insulating composite material and preparation method thereof - Google Patents
Barium sulfate-barium silicate-aerosil multilayer heat insulating composite material and preparation method thereof Download PDFInfo
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- CN109809416A CN109809416A CN201910185882.6A CN201910185882A CN109809416A CN 109809416 A CN109809416 A CN 109809416A CN 201910185882 A CN201910185882 A CN 201910185882A CN 109809416 A CN109809416 A CN 109809416A
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- barium sulfate
- heat insulating
- aerosil
- barium
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Abstract
The invention discloses a kind of preparation methods of barium sulfate-barium silicate-aerosil multilayer heat insulating composite material, the following steps are included: S1: silica dioxide gel being dissolved in the in the mixed solvent of water and alcohol, dispersing agent is added, is uniformly mixed, the pH value of solution is controlled less than 2, temperature is less than 15 DEG C；The molar ratio of the in the mixed solvent, water and alcohol is 1:3~10；S2: being added barium sulfate in the gel rubber system obtained to step S1, stirring, and is passed through inert gas；To after reaction, stand to gel forming；S3: gel 24~48h of aging that step S2 is obtained, after drying to get multilayer heat insulating composite material.The invention also discloses barium sulfate-barium silicate-aerosil multilayer heat insulating composite materials as made from the method.Preparation method of the invention is simple, and obtained composite heat-insulated material not only exceptional stability in structure, but also possesses good heat-proof quality.
Description
Technical field
The present invention relates to heat-barrier material technical fields, and in particular to a kind of barium sulfate-barium silicate-aerosil is more
Layer composite heat-insulated material and preparation method thereof.
Background technique
Energy problem is currently the bottleneck of global science and technology and economic development, and tapping a new source of energy and increasing operation rate is hot spot
Topic.One of the measure that efficient heat-barrier material is most scientific economy is developed, therefore studies high temperature resistant and excellent in mechanical performance
Heat-barrier material be that there is very strong social effect.Early in 1931, American scientist just developed SiO2Aeroge, but it is simultaneously
Military and civilian effectively insulating performance requirement is not reached.Research and development height is tough at present and thermostable heat insulation material is still
One big technical problem.Inorganic aerogel powder is the porous structure with 3 D stereo, and gaseous medium is filled in gap.
The porous network structure of the Nano grade of composition makes inorganic aerogels powder possess low density and high specific surface area.Therefore
Developing new technology, to prepare inorganic aerogels powder body material extremely urgent.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of barium sulfate-barium silicate-aerosil MULTILAYER COMPOSITEs
Heat-barrier material and preparation method thereof.
In order to solve the above-mentioned technical problems, the present invention provides a kind of barium sulfate-barium silicate-aerosil multilayers
The preparation method of composite heat-insulated material, comprising the following steps:
Silica dioxide gel: being dissolved in the in the mixed solvent of water and alcohol by S1, and dispersing agent is added, and is uniformly mixed, and solution is controlled
PH value less than 2, temperature be 0~15 DEG C；The molar ratio of the in the mixed solvent, water and alcohol is 1:3~10；
S2: being added barium sulfate in the gel rubber system obtained to step S1, stirring, and is passed through inert gas；To the end of reacting
Afterwards, it stands to gel forming；
S3: gel 24~48h of aging that step S2 is obtained, after drying to get the multilayer heat insulating composite material.
Further, in step S1, the alcohol is ethyl alcohol and/or glycerine.
Further, in step S1, the dispersing agent is neopelex.
Further, it in step S1, is uniformly mixed using blender, the blender stirring rate is 2000~5000r/
min。
Further, in step S2, the fineness of the barium sulfate is 1000~4000 mesh.
Further, in step S2, the mass ratio of the barium sulfate and silica dioxide gel is 1:3~8.
Further, in step S2, the time of the standing is 4~8h.
Further, in step S3, in aging period, further include the steps that replacing solvent.
Another aspect of the present invention additionally provides the barium sulfate-barium silicate-silica being prepared by any of the above-described method
Aeroge multilayer heat insulating composite material.
Beneficial effects of the present invention:
1, the present invention is by the way that in room temperature condition, by barium sulfate outer surface and active silica gel reaction, and then formation is more
Hole silicic acid barium layer, remaining silica dioxide gel are converted in situ into porous aeroge again, and this aerogel layer constructed can have
Effect prevents from collapsing, and is conducive to generate porous structure；In conjunction with silicic acid barium layer, heat-proof quality can be obviously improved.
2, preparation method of the invention is simple, and one-step method has synthesized the effective thermal insulation layer of multilayer at room temperature；And silicon
Source is at low cost, and equipment requirement is low.
3, barium sulfate-barium silicate-aerosil multilayer heat insulating composite material of the invention, it is not only abnormal in structure
Stablize, and possess good heat-proof quality, can be widely applied in fields such as building, space flight and aviation, military projects.
Detailed description of the invention
Fig. 1 is the process flow chart of preparation method of the invention；
Fig. 2 is the scanning electron microscope (SEM) photograph of raw material sulphuric acid barium of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment 1
The present embodiment the preparation method is as follows:
By 4.5 parts of silica dioxide gels, 0.5 part of dispersing agent neopelex and deionized water and ethyl alcohol are tried
Agent (molar ratio 1:10) is placed in dispersion agitator tank, and dispersion stirring 4 hours, stirring rate 2000r/min controls solution
For pH value less than 2, temperature is 0~5 DEG C；To well dispersed, 1.5 part of 2000 mesh barium sulfate powder is put into system, and blast simultaneously
Nitrogen.Reaction 6 hours stands 4 hours.Continue aging 24 hours, during which replaces kettle internal solvent 2 times.Last constant pressure and dry, i.e.,
Obtain barium sulfate-barium silicate-aerosil multilayer heat insulating composite material.
Embodiment 2
The present embodiment the preparation method is as follows:
By 6 parts of reactive silica Silica hydrogels, 1 part of dispersing agent neopelex and deionized water and glycerine
Reagent (molar ratio 1:5) is placed in dispersion agitator tank, and dispersion stirring 5 hours, stirring rate 5000r/min controls solution
PH value less than 2, temperature be 5~10 DEG C；To well dispersed, the barium sulfate powder of 1.5 part of 4000 mesh is put into system, and simultaneously
Blast argon gas.Reaction 10 hours stands 5 hours.Continue aging 30 hours, during which replaces kettle internal solvent 3 times.Last normal pressure is dry
It is dry to get barium sulfate-barium silicate-aerosil multilayer heat insulating composite material.
Embodiment 3
The present embodiment the preparation method is as follows:
By 6 parts of reactive silica Silica hydrogels, 4 parts of dispersing agent neopelexes and deionized water water and ethyl alcohol
Reagent (molar ratio 1:4) is placed in dispersion agitator tank, and dispersion stirring 5 hours, stirring rate 4000r/min controls solution
PH value less than 2, temperature be 10~15 DEG C；To well dispersed, the barium sulfate of 3 part of 3000 mesh is put into system, and is blasted simultaneously
Nitrogen.Reaction 10 hours stands 6 hours.Continue aging 40 hours, during which replaces kettle internal solvent 4 times.Last constant pressure and dry,
Up to barium sulfate-barium silicate-aerosil multilayer heat insulating composite material.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention
Protection scope within.Protection scope of the present invention is subject to claims.
Claims (9)
1. a kind of preparation method of barium sulfate-barium silicate-aerosil multilayer heat insulating composite material, which is characterized in that
The following steps are included:
Silica dioxide gel: being dissolved in the in the mixed solvent of water and alcohol by S1, and dispersing agent is added, and is uniformly mixed, is controlled the pH of solution
For value less than 2, temperature is 0~15 DEG C；The molar ratio of the in the mixed solvent, water and alcohol is 1:3~10；
S2: being added barium sulfate in the gel rubber system obtained to step S1, stirring, and is passed through inert gas；It is quiet to after reaction
It sets to gel forming；
S3: gel 24~48h of aging that step S2 is obtained, after drying to get the multilayer heat insulating composite material.
2. the preparation side of barium sulfate-barium silicate-aerosil multilayer heat insulating composite material as described in claim 1
Method, which is characterized in that in step S1, the alcohol is ethyl alcohol and/or glycerine.
3. the preparation side of barium sulfate-barium silicate-aerosil multilayer heat insulating composite material as described in claim 1
Method, which is characterized in that in step S1, the dispersing agent is neopelex.
4. the preparation side of barium sulfate-barium silicate-aerosil multilayer heat insulating composite material as described in claim 1
Method, which is characterized in that in step S1, be uniformly mixed using blender, the blender stirring rate is 2000~5000r/
min。
5. the preparation side of barium sulfate-barium silicate-aerosil multilayer heat insulating composite material as described in claim 1
Method, which is characterized in that in step S2, the fineness of the barium sulfate is 1000~4000 mesh.
6. the preparation side of barium sulfate-barium silicate-aerosil multilayer heat insulating composite material as described in claim 1
Method, which is characterized in that in step S2, the mass ratio of the barium sulfate and silica dioxide gel is 1:3~8.
7. the preparation side of barium sulfate-barium silicate-aerosil multilayer heat insulating composite material as described in claim 1
Method, which is characterized in that in step S2, the time of the standing is 4~8h.
8. the preparation side of barium sulfate-barium silicate-aerosil multilayer heat insulating composite material as described in claim 1
Method, which is characterized in that in step S3, in aging period, further include the steps that replacing solvent.
9. barium sulfate-barium silicate-aerosil that described in any item methods are prepared according to claim 1~8
Multilayer heat insulating composite material.
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| CN201910185882.6A CN109809416B (en) | 2019-03-12 | 2019-03-12 | Barium sulfate-barium silicate-silicon dioxide aerogel multilayer composite heat-insulating material and preparation method thereof |
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| CN201910185882.6A CN109809416B (en) | 2019-03-12 | 2019-03-12 | Barium sulfate-barium silicate-silicon dioxide aerogel multilayer composite heat-insulating material and preparation method thereof |
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| CN109809416B CN109809416B (en) | 2020-07-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118343821A (en) * | 2024-06-05 | 2024-07-16 | 重庆市鲁渝矿业发展有限公司 | Barium sulfate-containing multi-element composite aerogel porous heat insulation material and preparation method thereof |
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| CN107163855A (en) * | 2017-05-23 | 2017-09-15 | 郑善 | A kind of silica aerogel reflective insulation exterior wall paint and preparation method thereof |
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| CN109305766A (en) * | 2018-12-13 | 2019-02-05 | 西安建筑科技大学 | A kind of method that uses barium hydroxide and silicic acid to prepare gelling material |
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| US8765230B1 (en) * | 2009-12-01 | 2014-07-01 | The Boeing Company | Thermal barrier coated RF radomes and method |
| CN103333542A (en) * | 2013-07-04 | 2013-10-02 | 河南工业大学 | Silica aerogel microsphere composite thermal insulation coating |
| CN103709868A (en) * | 2013-12-25 | 2014-04-09 | 广州泰祥实业新材料科技（新丰）有限公司 | Microspherical SiO2 aerogel compound heat-insulating/warm-keeping external wall paint and preparation method thereof |
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| CN109305766A (en) * | 2018-12-13 | 2019-02-05 | 西安建筑科技大学 | A kind of method that uses barium hydroxide and silicic acid to prepare gelling material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118343821A (en) * | 2024-06-05 | 2024-07-16 | 重庆市鲁渝矿业发展有限公司 | Barium sulfate-containing multi-element composite aerogel porous heat insulation material and preparation method thereof |
| CN118343821B (en) * | 2024-06-05 | 2024-11-01 | 重庆市鲁渝矿业发展有限公司 | Barium sulfate-containing multi-element composite aerogel porous heat insulation material and preparation method thereof |
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Denomination of invention: Barium sulfate barium silica aerogel multilayer composite thermal insulation material and preparation method thereof Effective date of registration: 20220128 Granted publication date: 20200703 Pledgee: Yangzhou Branch of Bank of Jiangsu Co.,Ltd. Pledgor: JIANGSU QUNXIN POWDER TECHNOLOGY Co.,Ltd. Registration number: Y2022980001234 |