A kind of tough polymer/cage silsesquioxane hybrid airgel and its preparation method and application
A technology of silsesquioxane and polymer, which is applied in the field of tough polymer/cage silsesquioxane hybrid airgel and its preparation, can solve the problems of low preparation efficiency and long cycle, and achieve the The effect of good lumpiness, short cycle and low density
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Embodiment 1
[0037] (1) octaaminopropyl silsesquioxane and p-phenylene diisocyanate are mixed uniformly in a formamide solvent with a reactive functional group molar ratio of 1:0.5, and it is prepared into a solution whose solute mass concentration is 5g / L, and then Heating at 40°C for 24 hours to initiate polymerization reaction to obtain polymer / cage silsesquioxane hybrid wet gel;
[0038] 2) Aging the above wet gel in acetone, the aging time is 4h, the aging temperature is 30°C, and then the wet gel is subjected to supercritical CO 2 Dry to obtain polymer cage silsesquioxane hybrid airgel.
[0039] The tough polymer / cage silsesquioxane hybrid airgel prepared in Example 1 has a pore size distribution of 2 to 250 nm and a BET specific surface area of 1500 m 2 g -1 , with a density of 0.01g cm -3 , with a thermal conductivity of 0.01W·m -1 k -1 , the compressive modulus is 2MPa, the flexural modulus is 0.2MPa, the bending deformation is 95%, and it can withstand 500°C in the air atm...
Embodiment 2
[0041] 1) Mix octaaminophenylsilsesquioxane and bisphenol A type epoxy resin with a reactive functional group molar ratio of 1:1 evenly in an acetone solvent, and prepare a solution with a solute mass concentration of 40g / L, Then heating at 50°C for 16 hours to initiate a polymerization reaction to obtain a polymer cage-like silsesquioxane hybrid wet gel;
[0042] 2) Aging the above-mentioned wet gel in tetrahydrofuran for 24 hours at an aging temperature of 40°C, and then drying the wet gel at 60°C under normal pressure to obtain a polymer cage-like silsesquioxane hybrid aerogel .
[0043] The pore size distribution of the tough polymer / cage silsesquioxane hybrid airgel prepared in Example 2 is 5-300 nm, and the BET specific surface area is 1200 m 2 g -1 , with a density of 0.05g cm -3 , the thermal conductivity is 0.02W·m -1 k -1 , The compressive modulus is 10MPa, the flexural modulus is 1MPa, the bending deformation is 85%, and it can withstand 450°C in the air atmosp...
Embodiment 3
[0045] 1) The reactive functional group molar ratio is 1:1.5 decaaminopropyl silsesquioxane and triphenylmethane triisocyanate are mixed uniformly in acetamide solvent, and the solute mass concentration is prepared into a solution of 400g / L, Then heating at 60°C for 10 hours to initiate a polymerization reaction to obtain a polymer / cage silsesquioxane hybrid wet gel;
[0046] 2) Aging the above wet gel in acetone, the aging time is 4h, the aging temperature is 30°C, and then the wet gel is subjected to supercritical CO 2 Dry to obtain polymer cage silsesquioxane hybrid airgel.
[0047] The tough polymer / cage silsesquioxane hybrid airgel prepared in Example 3 has a pore size distribution of 2 to 500 nm and a BET specific surface area of 100 m 2 g -1 , with a density of 0.45g cm -3 , with a thermal conductivity of 0.05W·m -1 k -1 , the compressive modulus is 100MPa, the flexural modulus is 10MPa, the bending deformation is 40%, and it can withstand 500°C in the air atmosp...
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