Porous silicon resin and lightweight flexible flame-retardant composite material

A technology of porous silicon and resin, which is applied in the field of nanoporous materials, can solve the problems that thermal protection materials cannot meet the requirements of flame retardancy, ultra-light weight, high strength, easy combustion, ablation and peeling, and no flame retardancy. Thermal insulation application value, low density and thermal conductivity, effect of low thermal conductivity

Active Publication Date: 2022-03-11
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned patents all use small molecular siloxane monomers as the silicon source to prepare rigid or flexible silicon aerogels by the sol-gel method; but the silicon aerogels prepared by the above-mentioned method are easily Combustion, ablation and peeling occur, do not have flame retardant properties, and cannot meet the various needs of thermal protection materials such as flame retardant, ultra-light weight, and high strength

Method used

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  • Porous silicon resin and lightweight flexible flame-retardant composite material
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  • Porous silicon resin and lightweight flexible flame-retardant composite material

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preparation example Construction

[0054] The specific embodiment of the present invention provides a kind of porous silicone resin, its preparation method, comprises:

[0055] (1) Preparation of porous silicone resin precursor solution: first add flame retardant and surfactant to the solvent and stir for 10-20 minutes, then add siloxane monomer, catalyst and auxiliary agent, and then vigorously stir for 30-300 minutes, Obtain porous silicone resin precursor solution;

[0056] (2) Curing process: under sealed conditions, the above-mentioned porous silicone resin precursor solution is solidified at 60-120° C. for 12-72 hours, and then cooled to room temperature to obtain a porous silicone resin gel;

[0057] (3) Drying process: the wet porous silicone resin gel in step (2) is first left to air at room temperature for more than 24 hours, and then dried in an oven at 60-80°C for more than 48 hours until the weight no longer decreases, and a porous silicone gel is obtained. Silicone.

[0058] Another embodiment o...

Embodiment 1

[0071] Embodiment 1: porous silicone resin, its preparation method comprises the steps:

[0072] (1) Preparation of porous silicone resin precursor solution: first weigh 1.5g of magnesium hydroxide, 0.3g of cetyltrimethylammonium chloride and 8.0g of deionized water, put them in a beaker, and stir for 5-10 Minutes to form a transparent solution; then weigh 5.0g methyltriethoxysilane, 2.0g dimethyldiethoxysilane, 1.0g phenyltriethoxysilane, stir vigorously for 30-40 minutes; add dropwise Stir 5ml of 0.1mol / L hydrochloric acid solution until the pH is about 5; the molar ratio of the added HCl to the total siloxane monomer is about 1:9. Continue to stir, add 0.1mol / L ammonia solution after hydrolysis for 60 minutes, adjust the pH of the solution to about 7.0, and obtain the porous silicone resin precursor solution;

[0073] (2) Curing process: transfer the above-mentioned porous silicone resin precursor solution to a PP tube for sealing, then place it in an oven at 60°C for curi...

Embodiment 2

[0076] Embodiment 2: lightweight flexible flame-retardant composite material, its preparation method comprises the following steps:

[0077] (1) Preparation of porous silicone resin precursor solution: first 5.0g magnesium hydroxide, 4g cetyltrimethylammonium chloride were added to a beaker of 50g deionized water, stirred for 10 minutes to form a uniform transparent solution, Then add 30g methyltrimethoxysilane, 20g vinyltriethoxysilane, 7.0g p-methylphenyltrimethoxysilane to the beaker, stir vigorously, then add 0.1mol / L glacial acetic acid dropwise while stirring Solution 100ml, after dropwise addition within 30min, continue to stir for 30min, finally add 20g of urea, continue to stir for 10min to obtain a uniform porous silicone resin precursor solution;

[0078] (2) Impregnation process: put a lightweight flexible quartz fiber non-woven fabric (flexible non-woven three-dimensional fabric) with a size of 10cm×10cm×0.5cm, with a mass of 7.55g, into a steel mold of 10cm×10cm,...

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Abstract

The invention provides porous silicon resin and a lightweight flexible flame-retardant composite material, and belongs to the technical field of nano porous materials. Wherein the porous silicon resin precursor solution comprises a flame retardant, a surfactant, a siloxane monomer, a catalyst, an auxiliary agent and a solvent; the porous silicon resin precursor solution is obtained by firstly dissolving a flame retardant and a surfactant in a solvent, then adding a siloxane monomer, a catalyst and an auxiliary agent, and uniformly mixing; the porous silicon resin is prepared from the porous silicon resin precursor solution through a curing process and a drying process. The porous silicon resin and the lightweight flexible flame-retardant composite material prepared by the invention have excellent properties of high porosity, high flame retardance, high elasticity and high strain.

Description

technical field [0001] The invention belongs to the technical field of nanoporous materials, and in particular relates to a porous silicone resin and a lightweight flexible flame-retardant composite material, more specifically to a porous silicone resin and a preparation method thereof, and a lightweight flexible flame-retardant material based on a porous silicone resin as a matrix. Composite materials and methods for their preparation. Background technique [0002] In the fields of heat protection, heat sealing and flame retardant materials, silicone materials are often used in many fields such as high temperature resistant sealing materials, high temperature heat insulation materials, anti-oxidation coating materials, and oxidation-resistant ablation materials. Silicone resin has excellent high temperature resistance, oxidation resistance and excellent construction performance, and is widely used in technical fields such as fire protection, construction, and extreme fire e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/04C08G77/06C08J9/00C08L83/04C08K7/10
CPCC08G77/04C08G77/06C08J9/00C08K7/10C08J2383/04C08L83/04Y02E60/10C08K3/016C08K3/22C08K2003/2224C08K2003/2227C08K2003/026C08K3/34C08K5/19C08K3/28C08K3/26C08K2003/262
Inventor 师建军王伟孔磊冯志海杨云华李俊宁王金明耿琼赵磊卢鹉
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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