CN111423206A - High-elasticity silica aerogel - Google Patents
High-elasticity silica aerogel Download PDFInfo
- Publication number
- CN111423206A CN111423206A CN202010276380.7A CN202010276380A CN111423206A CN 111423206 A CN111423206 A CN 111423206A CN 202010276380 A CN202010276380 A CN 202010276380A CN 111423206 A CN111423206 A CN 111423206A
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- CN
- China
- Prior art keywords
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- silica aerogel
- titanium dioxide
- glass fiber
- hydrochloric acid
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000004965 Silica aerogel Substances 0.000 title claims abstract description 65
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 65
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 78
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims abstract description 57
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 39
- 239000003365 glass fiber Substances 0.000 claims abstract description 34
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 26
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 25
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 19
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000007864 aqueous solution Substances 0.000 claims abstract description 8
- 239000011259 mixed solution Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000003054 catalyst Substances 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- 239000003085 diluting agent Substances 0.000 claims description 5
- NASVITFAUKYCPM-UHFFFAOYSA-N ethanol;tetraethyl silicate Chemical compound CCO.CCO[Si](OCC)(OCC)OCC NASVITFAUKYCPM-UHFFFAOYSA-N 0.000 claims description 5
- 238000001879 gelation Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000005022 packaging material Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000006068 polycondensation reaction Methods 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 6
- 230000005855 radiation Effects 0.000 abstract description 6
- 230000008033 biological extinction Effects 0.000 abstract description 4
- 239000006229 carbon black Substances 0.000 abstract description 4
- 239000003605 opacifier Substances 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- 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
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
-
- 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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
- C04B14/064—Silica aerogel
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/50—Flexible or elastic materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Civil Engineering (AREA)
- Glass Compositions (AREA)
- Glass Melting And Manufacturing (AREA)
- Silicon Compounds (AREA)
Abstract
The invention discloses a high-elasticity silica aerogel, which comprises the following raw materials in parts by weight: 90-100 parts of ethyl orthosilicate, 30-45 parts of hydrochloric acid, 60-80 parts of ammonia water, 110 parts of ethanolamine and aqueous solution thereof, 40-45 parts of acetonitrile, 30-45 parts of glass fiber and 50-60 parts of titanium dioxide, a certain amount of glass fiber and titanium dioxide are added into raw materials for producing silica aerogel, titanium dioxide powder is selected as an opacifier to obtain the highest extinction coefficient relative to carbon black material, and then the titanium dioxide powder is doped into the silica aerogel to effectively reduce the radiation heat conduction at high temperature, so that the total heat conduction rate is kept at a low level at high temperature, and the doping of the glass fiber can increase the elastic modulus of the solidified silica aerogel finished product, improve the brittle mechanical property of the silica aerogel and improve the elasticity and toughness of the silica aerogel.
Description
Technical Field
The invention relates to a production process of a heat insulation material, in particular to a high-elasticity silica aerogel.
Background
Silica aerogel is a new type of thermal insulation material with very low thermal conductivity developed in recent years, and its thermal conductivity is composed of solid state conduction, gaseous state conduction and radiation conduction, and its total thermal conductivity is about 0 at room temperature and normal pressure. 02W (m ● K), which has a thermal conductivity of 0 to 0. 03W (m ● K) -) ] is lower by more than 30 percent (3) and can resist the high temperature of more than 800C.
Silica aerogel prepared by the existing formula is limited by the material properties, and when the silica aerogel is used in a high-heat state at 800 ℃, the radiation-resistant heat conduction efficiency of the silica aerogel is poor, and the thermal stability and the mechanical property of a material body are poor.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a high-elasticity silica aerogel, which has a mature process, a certain amount of glass fiber and titanium dioxide are added into raw materials for producing the silica aerogel, the titanium dioxide powder is selected as an opacifier to obtain the highest extinction coefficient relative to a carbon black material, and the titanium dioxide powder is doped into the silica aerogel to effectively reduce the radiation heat conduction of the silica aerogel at high temperature, so that the total heat conduction of the silica aerogel is kept at a low level at high temperature, and the doping of the glass fiber can increase the elastic modulus of the solidified silica aerogel finished product, improve the brittle mechanical property of the silica aerogel and improve the elasticity and toughness of the silica aerogel.
In order to achieve the purpose, the invention provides the following technical scheme: a high-elasticity silica aerogel comprises the following raw materials in parts by weight: 90-100 parts of ethyl orthosilicate, 30-45 parts of hydrochloric acid, 60-80 parts of ammonia water, 110 parts of ethanolamine and aqueous solution thereof, 40-45 parts of acetonitrile, 30-45 parts of glass fiber and 50-60 parts of titanium dioxide, and comprises the following specific preparation steps:
s1, selecting raw materials: selecting 95 parts of tetraethoxysilane, 35 parts of hydrochloric acid, 70 parts of ammonia water, 105 parts of ethanolamine and aqueous solution thereof, 35 parts of glass fiber and 55 parts of titanium dioxide;
s2, conveying raw materials: putting ethyl orthosilicate, hydrochloric acid and ammonia water into an ultrasonic pool, and then putting titanium dioxide, glass fiber and water into the ultrasonic pool;
s3, preparation of raw materials: putting titanium dioxide powder and glass fiber into a proper amount of water, oscillating for 10 minutes in an ultrasonic pool to uniformly disperse the titanium dioxide powder and the glass fiber, then adding hydrochloric acid, ammonia water and tetraethoxysilane ethanol, catalyzing by using the hydrochloric acid and the ammonia water as catalysts, continuing oscillating for 10 minutes, adding the catalysts, then continuing adding acetonitrile into the ultrasonic pool as a diluent, then injecting the mixed solution into a mold, and after hydrolysis-polycondensation reaction, allowing the mixed solution to form gel in the mold;
s4, packaging materials: and after the silica aerogel is formed, storing and packaging the finished silica aerogel by virtue of a storage box.
Preferably, the gelation time of the silica aerogel mixed solution is controlled within 4 to 6 minutes after the mixed solution is injected into the mold.
Preferably, the silica aerogel mixture is pre-stirred and mixed in an ultrasonic pool before being filled into a mold.
Preferably, the acetonitrile is added to the ultrasonic bath with stirring.
The invention has the technical effects and advantages that:
the invention has mature process, a certain amount of glass fiber and titanium dioxide are added into the raw materials for producing the silica aerogel, the titanium dioxide powder is selected as the opacifier, and the titanium dioxide powder can obtain the highest extinction coefficient relative to the carbon black material, and the titanium dioxide powder is doped into the silica aerogel, so that the radiation heat conduction of the silica aerogel at high temperature can be effectively reduced, and the total heat conduction of the silica aerogel is kept at a very low level at high temperature; the glass fiber is doped in the silica aerogel, so that the elastic modulus of the solidified silica aerogel finished product can be increased, the relatively brittle and strong mechanical property of the silica aerogel finished product can be improved, and the elasticity and the toughness of the silica aerogel can be improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A high-elasticity silica aerogel comprises the following raw materials in parts by weight: 90-100 parts of ethyl orthosilicate, 30-45 parts of hydrochloric acid, 60-80 parts of ammonia water, 110 parts of ethanolamine and aqueous solution thereof, 40-45 parts of acetonitrile, 30-45 parts of glass fiber and 50-60 parts of titanium dioxide, and comprises the following specific preparation steps:
s1, selecting raw materials: selecting 95 parts of tetraethoxysilane, 35 parts of hydrochloric acid, 70 parts of ammonia water, 105 parts of ethanolamine and water solution thereof, 40 parts of acetonitrile, 35 parts of glass fiber and 55 parts of titanium dioxide;
s2, conveying raw materials: putting ethyl orthosilicate, hydrochloric acid and ammonia water into an ultrasonic pool, and then putting titanium dioxide, glass fiber and water into the ultrasonic pool;
s3, preparation of raw materials: putting titanium dioxide powder and glass fiber into a proper amount of water, oscillating for 10 minutes in an ultrasonic pool to uniformly disperse the titanium dioxide powder and the glass fiber, then adding hydrochloric acid, ammonia water and tetraethoxysilane ethanol, catalyzing by using the hydrochloric acid and the ammonia water as catalysts, continuing oscillating for 10 minutes, adding the catalysts, then continuing adding acetonitrile into the ultrasonic pool as a diluent, then injecting the mixed solution into a mold, and after hydrolysis-polycondensation reaction, allowing the mixed solution to form gel in the mold;
s4, packaging materials: and after the silica aerogel is formed, storing and packaging the finished silica aerogel by virtue of a storage box.
Preferably, the gelation time of the silica aerogel mixed solution is controlled within 4 to 6 minutes after the mixed solution is injected into the mold.
Preferably, the silica aerogel mixture is stirred and mixed in an ultrasonic pool before being filled into a mold.
Preferably, the acetonitrile is stirred and mixed uniformly when being put into the ultrasonic pool.
Example 2
A high-elasticity silica aerogel comprises the following raw materials in parts by weight: 90-100 parts of ethyl orthosilicate, 30-45 parts of hydrochloric acid, 60-80 parts of ammonia water, 110 parts of ethanolamine and aqueous solution thereof, 40-45 parts of acetonitrile, 30-45 parts of glass fiber and 50-60 parts of titanium dioxide, and comprises the following specific preparation steps:
s1, selecting raw materials: selecting 95 parts of tetraethoxysilane, 35 parts of hydrochloric acid, 70 parts of ammonia water, 105 parts of ethanolamine and water solution thereof, 42 parts of acetonitrile, 35 parts of glass fiber and 55 parts of titanium dioxide;
s2, conveying raw materials: putting ethyl orthosilicate, hydrochloric acid and ammonia water into an ultrasonic pool, and then putting titanium dioxide, glass fiber and water into the ultrasonic pool;
s3, preparation of raw materials: putting titanium dioxide powder and glass fiber into a proper amount of water, oscillating for 10 minutes in an ultrasonic pool to uniformly disperse the titanium dioxide powder and the glass fiber, then adding hydrochloric acid, ammonia water and tetraethoxysilane ethanol, catalyzing by using the hydrochloric acid and the ammonia water as catalysts, continuing oscillating for 10 minutes, adding the catalysts, then continuing adding acetonitrile into the ultrasonic pool as a diluent, then injecting the mixed solution into a mold, and after hydrolysis-polycondensation reaction, allowing the mixed solution to form gel in the mold;
s4, packaging materials: and after the silica aerogel is formed, storing and packaging the finished silica aerogel by virtue of a storage box.
Preferably, the gelation time of the silica aerogel mixed solution is controlled within 4 to 6 minutes after the mixed solution is injected into the mold.
Preferably, the silica aerogel mixture is stirred and mixed in an ultrasonic pool before being filled into a mold.
Preferably, the acetonitrile is stirred and mixed uniformly when being put into the ultrasonic pool.
Example 3
A high-elasticity silica aerogel comprises the following raw materials in parts by weight: 90-100 parts of ethyl orthosilicate, 30-45 parts of hydrochloric acid, 60-80 parts of ammonia water, 110 parts of ethanolamine and aqueous solution thereof, 40-45 parts of acetonitrile, 30-45 parts of glass fiber and 50-60 parts of titanium dioxide, and comprises the following specific preparation steps:
s1, selecting raw materials: selecting 95 parts of tetraethoxysilane, 35 parts of hydrochloric acid, 70 parts of ammonia water, 105 parts of ethanolamine and water solution thereof, 45 parts of acetonitrile, 35 parts of glass fiber and 55 parts of titanium dioxide;
s2, conveying raw materials: putting ethyl orthosilicate, hydrochloric acid and ammonia water into an ultrasonic pool, and then putting titanium dioxide, glass fiber and water into the ultrasonic pool;
s3, preparation of raw materials: putting titanium dioxide powder and glass fiber into a proper amount of water, oscillating for 10 minutes in an ultrasonic pool to uniformly disperse the titanium dioxide powder and the glass fiber, then adding hydrochloric acid, ammonia water and tetraethoxysilane ethanol, catalyzing by using the hydrochloric acid and the ammonia water as catalysts, continuing oscillating for 10 minutes, adding the catalysts, then continuing adding acetonitrile into the ultrasonic pool as a diluent, then injecting the mixed solution into a mold, and after hydrolysis-polycondensation reaction, allowing the mixed solution to form gel in the mold;
s4, packaging materials: and after the silica aerogel is formed, storing and packaging the finished silica aerogel by virtue of a storage box.
Preferably, the gelation time of the silica aerogel mixed solution is controlled within 4 to 6 minutes after the mixed solution is injected into the mold.
Preferably, the silica aerogel mixture is stirred and mixed in an ultrasonic pool before being filled into a mold.
Preferably, the acetonitrile is stirred and mixed uniformly when being put into the ultrasonic pool.
In summary, the following steps: compared with other treatment processes, the high-elasticity silica aerogel provided by the invention has the following advantages: a certain amount of glass fiber and titanium dioxide are added into raw materials for producing the silica aerogel, titanium dioxide powder is selected as an opacifier, and the highest extinction coefficient can be obtained relative to carbon black materials, and then the titanium dioxide powder is doped into the silica aerogel, so that the radiation heat conduction of the silica aerogel at high temperature can be effectively reduced, the total heat conduction of the silica aerogel is kept at a low level at high temperature, and the doping of the glass fiber can increase the elastic modulus of a finished product of the silica aerogel after solidification, improve the brittle mechanical property of the silica aerogel and improve the elasticity and the toughness of the silica aerogel.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (4)
1. A highly elastic silica aerogel characterized by: comprises the following raw materials in parts by weight: 90-100 parts of ethyl orthosilicate, 30-45 parts of hydrochloric acid, 60-80 parts of ammonia water, 110 parts of ethanolamine and aqueous solution thereof, 40-45 parts of acetonitrile, 30-45 parts of glass fiber and 50-60 parts of titanium dioxide, and comprises the following specific preparation steps:
s1, selecting raw materials: selecting 95 parts of tetraethoxysilane, 35 parts of hydrochloric acid, 70 parts of ammonia water, 105 parts of ethanolamine and aqueous solution thereof, 35 parts of glass fiber and 55 parts of titanium dioxide;
s2, conveying raw materials: putting ethyl orthosilicate, hydrochloric acid and ammonia water into an ultrasonic pool, and then putting titanium dioxide, glass fiber and water into the ultrasonic pool;
s3, preparation of raw materials: putting titanium dioxide powder and glass fiber into a proper amount of water, oscillating for 10 minutes in an ultrasonic pool to uniformly disperse the titanium dioxide powder and the glass fiber, then adding hydrochloric acid, ammonia water and tetraethoxysilane ethanol, catalyzing by using the hydrochloric acid and the ammonia water as catalysts, continuing oscillating for 10 minutes, adding the catalysts, then continuing adding acetonitrile into the ultrasonic pool as a diluent, then injecting the mixed solution into a mold, and after hydrolysis-polycondensation reaction, allowing the mixed solution to form gel in the mold;
s4, packaging materials: and after the silica aerogel is formed, storing and packaging the finished silica aerogel by virtue of a storage box.
2. A highly elastic silica aerogel according to claim 1, characterized in that: the gelation time of the silica aerogel mixed solution is controlled within 4-6 minutes after the mixed solution is injected into the mold.
3. A highly elastic silica aerogel according to claim 1, characterized in that: the silica aerogel mixture should be pre-stirred and mixed in an ultrasonic tank before being injected into a mold.
4. A highly elastic silica aerogel according to claim 1, characterized in that: the acetonitrile should be stirred and mixed in advance when being put into the ultrasonic pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010276380.7A CN111423206A (en) | 2020-04-09 | 2020-04-09 | High-elasticity silica aerogel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010276380.7A CN111423206A (en) | 2020-04-09 | 2020-04-09 | High-elasticity silica aerogel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111423206A true CN111423206A (en) | 2020-07-17 |
Family
ID=71552434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010276380.7A Pending CN111423206A (en) | 2020-04-09 | 2020-04-09 | High-elasticity silica aerogel |
Country Status (1)
| Country | Link |
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| CN (1) | CN111423206A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111938391A (en) * | 2020-08-19 | 2020-11-17 | 程鹏 | Anti-toppling and sprinkling portable water cup |
| CN113831581A (en) * | 2021-09-23 | 2021-12-24 | 航天特种材料及工艺技术研究所 | High-elasticity anti-radiation nanofiber aerogel material and preparation method thereof |
-
2020
- 2020-04-09 CN CN202010276380.7A patent/CN111423206A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111938391A (en) * | 2020-08-19 | 2020-11-17 | 程鹏 | Anti-toppling and sprinkling portable water cup |
| CN113831581A (en) * | 2021-09-23 | 2021-12-24 | 航天特种材料及工艺技术研究所 | High-elasticity anti-radiation nanofiber aerogel material and preparation method thereof |
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Application publication date: 20200717 |