CN107987311A - A kind of preparation method of hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel - Google Patents
A kind of preparation method of hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel Download PDFInfo
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- CN107987311A CN107987311A CN201711448536.XA CN201711448536A CN107987311A CN 107987311 A CN107987311 A CN 107987311A CN 201711448536 A CN201711448536 A CN 201711448536A CN 107987311 A CN107987311 A CN 107987311A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/36—After-treatment
- C08J9/40—Impregnation
- C08J9/405—Impregnation with polymerisable compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/02—Foams characterised by their properties the finished foam itself being a gel or a gel being temporarily formed when processing the foamable composition
- C08J2205/026—Aerogel, i.e. a supercritically dried gel
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/05—Open cells, i.e. more than 50% of the pores are open
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
- C08J2361/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08J2361/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08J2361/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
Abstract
The invention discloses a kind of preparation method of hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel, the preparation method includes the following steps：1）Trialkoxy silane containing alkyl group and distilled water are mixed to obtain clear solution in proportion, the pH value for then adding concentrated ammonia liquor adjusting solution obtains colloidal sol for 8.5 ~ 11.5；2）By melamine sponge impregnating in step 1）Gelation is carried out in obtained colloidal sol, gelling temperature is 0 ~ 90 DEG C, and gelation time is 0.1 ~ 20h, obtains the melamine sponge enhancing compound wet gel of polysilsesquioxane；3）By step 2）The obtained melamine sponge enhancing compound wet gel of polysilsesquioxane is dried, and melamine sponge enhancing polysilsesquioxane composite aerogel is made；The present invention efficiently solves the problems such as existing pure aerosil poor mechanical property such as brittleness is big, elasticity modulus is low, frangible, and efficiently solve that to use methyltrimethoxysilane for silicon source to substitute polysilsesquioxane aerogel elasticity modulus prepared by traditional tetraethyl orthosilicate and quanmethyl silicate relatively low, it is difficult to the problem of as load-bearing material.
Description
Technical field
The present invention relates to nano-porous materials preparing technical field, and in particular to a kind of hydrophobicity melamine sponge enhancing
Polysilsesquioxane composite aerogel and preparation method thereof.
Background technology
Aerosil is a kind of new material with three-D nano-porous structure, have low-density (0.003 ~
0.8g·cm-3), high porosity (80 ~ 99.8%), high-specific surface area (200 ~ 1000m2·g-1), lower thermal conductivity (~ 0.02Wm- 1K-1) etc. property, have in application fields such as aerospace, chemical industry, energy saving building, military affairs, communication, electronics, metallurgy very wide
Prospect.But pure aerosil poor mechanical property（Brittleness is big, elasticity modulus is low, frangible）Cause aeroge actual
Application difficult.
The problem of to overcome aerosil poor mechanical property, United States Patent (USP) US7078359 B2, US8214980
B2 and Chinese patent CN1803602A, CN101318659A, CN101671030A, CN101973752A are used as enhancing using fiber
Mutually improve the mechanical strength of aeroge.Although the mechanical strength of composite aerogel increases, fibre diameter compares airsetting
Glue aperture is much bigger, and the network structure resulted in is uneven, composite material there are it is certain the defects of.In addition, enhancing phase fiber
The compatibility of material and aeroge matrix can also influence the comprehensive performance of material.Using polymer and the compound method of silica
It is another method for improving Mechanical Properties of Aerogels, if U.S. Meador et al. is using enhancing by polymer SiO2Aeroge, profit
With polymer in SiO2Particle surface forms clad, the elasticity modulus of aeroge can be improved two orders of magnitude.Such as polyureas
Strengthen SiO2Aeroge（MEADOR M A B, CAPADONA L A, MCCORKLE L, et al. Structure-
property relationships in porous 3D nanostructures as a function of
preparation conditions: isocyanate cross-linked silica aerogels [J].
Chemistry of materials, 2007, 19(9): 2247-60）, epoxy enhancing SiO2Aeroge（MEADOR M A
B, WEBER A S, HINDI A, et al. Structure− Property Relationships in Porous 3D
Nanostructures: Epoxy-Cross-Linked Silica Aerogels Produced Using Ethanol as
the Solvent [J]. ACS applied materials & interfaces, 2009, 1(4): 894-906）, it is poly-
Styrene strengthens SiO2Aeroge（ILHAN F, FABRIZIO E F, MCCORKLE L, et al. Hydrophobic
monolithic aerogels by nanocasting polystyrene on amine-modified silica [J].
Journal of Materials Chemistry, 2006, 16(29): 3046-54）Deng.But the method that polymer is compound
The process of gel surface functional group modification, exchange of solvent and organic monomer diffusion is needed, the cycle is long, preparation efficiency is low.
To improve the brittleness problems of aerosil, there is researcher to find to use methyltrimethoxysilane as silicon source
Substitute polysilsesquioxane prepared by traditional tetraethyl orthosilicate and quanmethyl silicate（It can be regarded as the derivative of silica）
Aeroge has good pliability, and has good hydrophobicity（VENKATESWARA RAO A, BHAGAT S D,
HIRASHIMA H, et al. Synthesis of flexible silica aerogels using
methyltrimethoxysilane (MTMS) precursor [J]. Journal of colloid and interface
science, 2006, 300(1):279-85, HAYASE G, KANAMORI K, FUKUCHI M, et al. Facile
Synthesis of Marshmallow-like Macroporous Gels Usable under Harsh Conditions
for the Separation of Oil and Water [J]. Angewandte Chemie International
Edition, 2013, 52(7): 1986-9）.But the polysilsesquioxane prepared using methyltrimethoxysilane as silicon source
Aeroge elasticity modulus is relatively low, no more than 1MPa, it is difficult to as load-bearing material.
Therefore, there is still a need for a kind of technique is simple, efficient production method prepares the airsetting glue material of excellent in mechanical performance
Material, to promote the scale application of aeroge.
The content of the invention
The present invention provides a kind of paraffin-hydrophobicity polysilsesquioxane aerogel composite shape-setting phase-change material and its preparation side
Method, the present invention efficiently solve that existing pure aerosil poor mechanical property such as brittleness is big, elasticity modulus is low, frangible etc.
Problem, and efficiently solve and use methyltrimethoxysilane to substitute traditional tetraethyl orthosilicate and quanmethyl silicate system for silicon source
Standby polysilsesquioxane aerogel elasticity modulus is relatively low, it is difficult to the problem of as load-bearing material.
The present invention is achieved through the following technical solutions：
A kind of preparation method of hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel, it is characterised in that：Institute
Preparation method is stated to include the following steps：
1）Trialkoxy silane containing alkyl group and distilled water are mixed to obtain clear solution, contain alkyl group in solution
The mass concentration of trialkoxy silane be 100 ~ 700 gL-1, then add concentrated ammonia liquor adjust the pH value of solution for 8.5 ~
11.5 obtain colloidal sol；
2）By melamine sponge impregnating in step 1）Gelation is carried out in obtained colloidal sol, gelling temperature is 0 ~ 90 DEG C, excellent
It is 40 ~ 70 DEG C to select gelling temperature, and gelation time is 0.1 ~ 20h, and preferably gelation time is 10 ~ 20 h, obtains melamine
Amine sponge strengthens the compound wet gel of polysilsesquioxane；
3）By step 2）The obtained melamine sponge enhancing compound wet gel of polysilsesquioxane is dried, and use is overcritical
CO2Drying is strengthened using vacuum freeze drying or using the conventional drying methods such as constant pressure and dry, obtained melamine sponge
Polysilsesquioxane composite aerogel.
The Technological improvement plan that further solves of the present invention is：
The step 1）Trialkoxy silane containing alkyl group is methyltrimethoxysilane, methyltriethoxysilane, second
Base trimethoxy silane, ethyl triethoxysilane, propyl trimethoxy silicane, propyl-triethoxysilicane, vinyl front three
Oxysilane, vinyltriethoxysilane, octyl group trimethoxy silane, octyltri-ethoxysilane, cetyl trimethoxy
Base silane, hexadecyl, dodecyltrimethoxysilane, dodecyl triethoxysilane, octadecane
One or more mixing in base trimethoxy silane, octadecyltriethoxy silane.
The Technological improvement plan that further solves of the present invention is：
The step 3）Obtained melamine sponge enhancing polysilsesquioxane composite aerogel porosity is 62.5 ~ 97.5%,
Pore-size distribution is 1 ~ 1000nm, and BET specific surface area is 50 ~ 1000m2·g-1, apparent density is 0.05 ~ 0.75 gcm-3, preferably
Apparent density is 0.05 ~ 0.20 gcm-3。
The Technological improvement plan that further solves of the present invention is：
The step 3）Obtained melamine sponge enhancing polysilsesquioxane composite aerogel compression modulus is 1.0 ~ 150
MPa, bending modulus are 0.1 ~ 5MPa.
The Technological improvement plan that further solves of the present invention is：
The step 3）Obtained melamine sponge enhancing polysilsesquioxane composite aerogel thermal conductivity for 0.01 ~
0.12W·m-1·k-1, 0.01 ~ 0.04Wm of thermal conductivity-1·k-1。
The Technological improvement plan that further solves of the present invention is：
The step 3）Obtained melamine sponge enhancing polysilsesquioxane composite aerogel has hydrophobicity, and contact angle is
90~180°。
Compared with prior art, the present invention there is following obvious advantage：
First, mutually for melamine sponge, melamine sponge is low with density for the enhancing that the present invention uses（<10kg·m3）, hole
Gap rate is high（>99.5%）, the characteristics of mechanical property is good, with aeroge it is compound after will not while Mechanical Properties of Aerogels is improved
The density of obvious increase aeroge.
2nd, melamine sponge of the present invention is cheap, mutually will not increase composite aerogel as enhancing
Production cost.
3rd, for the present invention compared with other polymers sponge or foam, melamine sponge has very excellent anti-flammability
Can, composite aerogel can be enable to be used in the environment more than 300 DEG C.
4th, preparation process of the invention is simple, of low cost, be easy to industrialized production.
Brief description of the drawings
Fig. 1 is that melamine sponge prepared by the embodiment of the present invention 1 strengthens polysilsesquioxane composite aerogel outside drawing；
Fig. 2 is that the hydrophobicity of melamine sponge enhancing polysilsesquioxane composite aerogel prepared by the embodiment of the present invention 3 is shown
It is intended to.
Embodiment
The technology of the present invention solution is further described with reference to embodiment：
Embodiment 1
It is 100 gL that methyltrimethoxysilane and distilled water, which are mixed to obtain mass concentration,-1Methyl trimethoxy epoxide
Silane clear solution, the pH value for adding concentrated ammonia liquor adjusting solution obtain colloidal sol for 8.5；
Melamine sponge impregnating is subjected to gelation in above-mentioned colloidal sol, it is 40 DEG C to control gelling temperature, during gelation
Between be 20h, obtain melamine sponge enhancing the compound wet gel of polysilsesquioxane；Wet gel is subjected to supercritical CO2It is dry
Obtain melamine sponge enhancing polysilsesquioxane composite aerogel.
Obtained composite aerogel pore-size distribution is 100 ~ 1000nm, and BET specific surface area is up to 1000 m2·g-1, density is
0.05 g·cm-3, porosity 97.5%, thermal conductivity is 0.02 Wm-1·k-1, compression modulus 1.0MPa, bending modulus is
0.1 MPa, is resistant to 300 in air atmosphereoMore than C high temperature, has hydrophobicity, and contact angle is 90 °.
Embodiment 2
It is 200 gL that methyltrimethoxysilane and distilled water, which are mixed to obtain mass concentration,-1Methyl trimethoxy epoxide
Silane clear solution, the pH value for adding concentrated ammonia liquor adjusting solution obtain colloidal sol for 9.5；
Melamine sponge impregnating is subjected to gelation in above-mentioned colloidal sol, it is 50 DEG C to control gelling temperature, during gelation
Between be 15 h, obtain melamine sponge enhancing the compound wet gel of polysilsesquioxane；Wet gel progress constant pressure and dry is obtained
Melamine sponge strengthens polysilsesquioxane composite aerogel.
Obtained composite aerogel pore-size distribution is 50 ~ 900nm, and BET specific surface area is up to 800 m2·g-1, density 0.15
g·cm-3, porosity 92.5%, thermal conductivity is 0.01 Wm-1·k-1, compression modulus is 2.5 MPa, bending modulus 0.15
MPa, is resistant to 305 in air atmosphereoMore than C high temperature, has hydrophobicity, and contact angle is 120 °.
Embodiment 3
It is 700 gL that methyltrimethoxysilane and distilled water, which are mixed to obtain mass concentration,-1Methyl trimethoxy epoxide
Silane clear solution, the pH value for adding concentrated ammonia liquor adjusting solution obtain colloidal sol for 11.5；
Melamine sponge impregnating is subjected to gelation in above-mentioned colloidal sol, it is 70 DEG C to control gelling temperature, during gelation
Between be 10 h, obtain melamine sponge enhancing the compound wet gel of polysilsesquioxane；Wet gel progress constant pressure and dry is obtained
Melamine sponge strengthens polysilsesquioxane composite aerogel.
Obtained composite aerogel pore-size distribution is 1 ~ 400nm, and BET specific surface area is up to 50 m2·g-1, density 0.75
g·cm-3, porosity 62.5%, thermal conductivity 0.12Wm-1·k-1, compression modulus is 120 MPa, bending modulus 5
MPa, is resistant to 350 in air atmosphereoMore than C high temperature, has hydrophobicity, and contact angle is 179.9 °.
Embodiment 4
It is 240 gL that propyl-triethoxysilicane and distilled water, which are mixed to obtain mass concentration,-1Propyl triethoxy
Silane clear solution, the pH value for adding concentrated ammonia liquor adjusting solution obtain colloidal sol for 10.5；
Melamine sponge impregnating is subjected to gelation in above-mentioned colloidal sol, it is 60 DEG C to control gelling temperature, during gelation
Between be 17 h, obtain melamine sponge enhancing the compound wet gel of polysilsesquioxane；Wet gel progress constant pressure and dry is obtained
Melamine sponge strengthens polysilsesquioxane composite aerogel.
Obtained composite aerogel pore-size distribution is 20 ~ 470nm, and BET specific surface area reaches 670m2·g-1, density 0.20
g·cm-3, porosity 90.0%, thermal conductivity 0.04Wm-1·k-1, compression modulus is 20 MPa, bending modulus 0.7
MPa, is resistant to 320 in air atmosphereoMore than C high temperature, has hydrophobicity, and contact angle is 165.5 °.
Embodiment 5
It is 300 gL that octyltri-ethoxysilane and distilled water, which are mixed to obtain mass concentration,-1Octyl group triethoxy
Silane clear solution, the pH value for adding concentrated ammonia liquor adjusting solution obtain colloidal sol for 10.0；
Melamine sponge impregnating is subjected to gelation in above-mentioned colloidal sol, it is 60 DEG C to control gelling temperature, during gelation
Between be 14 h, obtain melamine sponge enhancing the compound wet gel of polysilsesquioxane；Wet gel progress constant pressure and dry is obtained
Melamine sponge strengthens polysilsesquioxane composite aerogel.
Obtained composite aerogel pore-size distribution is 20 ~ 470nm, and BET specific surface area reaches 520m2·g-1, density 0.30
g·cm-3, porosity 85.0%, thermal conductivity 0.06Wm-1·k-1, compression modulus is 40 MPa, bending modulus 1.7
MPa, is resistant to 325 in air atmosphereoMore than C high temperature, has hydrophobicity, and contact angle is 168.2 °.
Embodiment 6
It is 200 gL that octadecyl trimethoxysilane and distilled water, which are mixed to obtain mass concentration,-1Octadecyl
Trimethoxy silane clear solution, the pH value for adding concentrated ammonia liquor adjusting solution obtain colloidal sol for 11.0；
Melamine sponge impregnating is subjected to gelation in above-mentioned colloidal sol, it is 90 DEG C to control gelling temperature, during gelation
Between be 20 h, obtain melamine sponge enhancing the compound wet gel of polysilsesquioxane；Wet gel is freeze-dried to obtain
Melamine sponge strengthens polysilsesquioxane composite aerogel.
Obtained composite aerogel pore-size distribution is 50 ~ 680nm, and BET specific surface area is up to 320 m2·g-1, density 0.18
g·cm-3, porosity 91.0%, thermal conductivity is 0.027 Wm-1·k-1, compression modulus is 12 MPa, bending modulus 1.2
MPa, is resistant to 312 in air atmosphereoMore than C high temperature, has hydrophobicity, and contact angle is 172.0 °.
It should be noted that above-described embodiment is only presently preferred embodiments of the present invention, it is not used for limiting the present invention's
Protection domain, the equivalent substitution or replacement made based on the above technical solutions, belongs to protection scope of the present invention,
Protection scope of the present invention is subject to claims.
Claims (10)
- A kind of 1. preparation method of hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel, it is characterised in that： The preparation method includes the following steps：1）Trialkoxy silane containing alkyl group and distilled water are mixed to obtain clear solution, contain alkyl group in solution The mass concentration of trialkoxy silane be 100 ~ 700 gL-1, then add concentrated ammonia liquor adjust the pH value of solution for 8.5 ~ 11.5 obtain colloidal sol；2）By melamine sponge impregnating in step 1）Gelation is carried out in obtained colloidal sol, gelling temperature is 0 ~ 90 DEG C, Gelation time is 0.1 ~ 20h, obtains the melamine sponge enhancing compound wet gel of polysilsesquioxane；3）By step 2）The obtained melamine sponge enhancing compound wet gel of polysilsesquioxane is dried, and use is overcritical CO2Drying is answered using vacuum freeze drying or using constant pressure and dry, obtained melamine sponge enhancing polysilsesquioxane Close aeroge.
- A kind of 2. system of hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel according to claim 1 Preparation Method, it is characterised in that：The step 1）Trialkoxy silane containing alkyl group is methyltrimethoxysilane, methyl three Ethoxysilane, ethyl trimethoxy silane, ethyl triethoxysilane, propyl trimethoxy silicane, propyl-triethoxysilicane Alkane, vinyltrimethoxysilane, vinyltriethoxysilane, octyl group trimethoxy silane, octyltri-ethoxysilane, ten Six alkyl trimethoxysilanes, hexadecyl, dodecyltrimethoxysilane, dodecyl triethoxy One or more mixing in silane, octadecyl trimethoxysilane, octadecyltriethoxy silane.
- A kind of 3. hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel according to claim 1 or 2 Preparation method, it is characterised in that：The gelling temperature is 40 ~ 70 DEG C.
- A kind of 4. hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel according to claim 1 or 2 Preparation method, it is characterised in that：10 ~ 20 h of gel time.
- A kind of 5. hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel according to claim 1 or 2 Preparation method, it is characterised in that：The step 3）Obtained melamine sponge strengthens polysilsesquioxane composite aerogel Porosity is 62.5 ~ 97.5%, and pore-size distribution is 1 ~ 1000nm, and BET specific surface area is 50 ~ 1000m2·g-1, apparent density is 0.05~0.75 g·cm-3。
- A kind of 6. hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel according to claim 1 or 2 Preparation method, it is characterised in that：The step 3）Obtained melamine sponge strengthens polysilsesquioxane composite aerogel Compression modulus is 1.0 ~ 150 MPa, and bending modulus is 0.1 ~ 5MPa.
- A kind of 7. hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel according to claim 1 or 2 Preparation method, it is characterised in that：The step 3）Obtained melamine sponge strengthens polysilsesquioxane composite aerogel Thermal conductivity is 0.01 ~ 0.12Wm-1·k-1。
- A kind of 8. hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel according to claim 1 or 2 Preparation method, it is characterised in that：The step 3）Obtained melamine sponge strengthens polysilsesquioxane composite aerogel With hydrophobicity, contact angle is 90 ~ 180 °.
- A kind of 9. system of hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel according to claim 5 Preparation Method, it is characterised in that：The apparent density is 0.05 ~ 0.20 gcm-3。
- 10. a kind of hydrophobicity melamine sponge enhancing polysilsesquioxane composite aerogel according to claim 7 Preparation method, it is characterised in that：0.01 ~ the 0.04Wm of thermal conductivity-1·k-1。
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| CN111732753A (en) * | 2020-06-04 | 2020-10-02 | 淮阴工学院 | Flexible polysiloxane aerogel and rapid preparation method thereof |
| CN111848114A (en) * | 2020-07-31 | 2020-10-30 | 航天海鹰(镇江)特种材料有限公司 | Super heat-insulating aerogel composite material and preparation process thereof |
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| CN111732753A (en) * | 2020-06-04 | 2020-10-02 | 淮阴工学院 | Flexible polysiloxane aerogel and rapid preparation method thereof |
| CN111732753B (en) * | 2020-06-04 | 2022-08-23 | 淮阴工学院 | Flexible polysiloxane aerogel and rapid preparation method thereof |
| CN111848114A (en) * | 2020-07-31 | 2020-10-30 | 航天海鹰(镇江)特种材料有限公司 | Super heat-insulating aerogel composite material and preparation process thereof |
| CN111848114B (en) * | 2020-07-31 | 2022-04-29 | 航天海鹰(镇江)特种材料有限公司 | Super heat-insulating aerogel composite material and preparation process thereof |
| CN112609453A (en) * | 2020-11-25 | 2021-04-06 | 南京工业大学 | High-strength high-elasticity low-thermal-conductivity silica aerogel heat insulation sheet and preparation method thereof |
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