Preparation method of non-shedding elastic-aerogel-coated long fiber composite material
A composite material and elastic gel technology, which is applied to ceramic products, other household utensils, household utensils, etc., can solve the problems of serious powder shedding rate, low gel strength, and restrictions on the promotion and application of airgel materials, and achieve guaranteed Product quality, the effect of reducing production costs
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Embodiment 1
[0028] The preparation method of the non-depulverizing elastic aerogel-coated long fiber composite material of this embodiment includes the following steps:
[0029] S1, the molar ratio of ethyl orthosilicate, ethanol, water and hydrochloric acid is 1:12:3:(5×10 -4 ) Mix in sequence and stir evenly to obtain the hydrolyzate of ethyl orthosilicate; mix the hydrolysate of ethyl orthosilicate and acidic silica sol at room temperature at a volume ratio of 10:1 to obtain the first mixture; The silica sol uses commercially available Si-28. The molar content of silicon in the first mixture was then adjusted to 5% using ethanol.
[0030] S2, the modified silica sol adopts methyl triethoxy silane, and mix methyl triethoxy silane, ethanol, water and hydrochloric acid according to 1:4:3:10 -2 After mixing in a volume ratio of, the hydrolyzed product of the modified silica sol is obtained. The hydrolysis product of methyltriethoxysilane and ammonia water are mixed at room temperature to obtai...
Embodiment 2
[0038] The preparation method of the non-depulverizing elastic aerogel-coated long fiber composite material of this embodiment includes the following steps:
[0039] S1, the molar ratio of ethyl orthosilicate, ethanol, water and hydrochloric acid is 1:4:3:10 -2 Mix in sequence and stir evenly to obtain the hydrolysis product of ethyl orthosilicate; mix the hydrolysis product of ethyl orthosilicate and acidic silica sol at room temperature at a volume ratio of 10:1 to obtain the first mixture; acidic silica Commercially available Si-28 was used as the sol. Then ethanol was used to adjust the molar content of silicon in the first mixture to 8%.
[0040] S2, the modified silica sol adopts polymethyltriethoxysilane, and the polymethyltriethoxysilane, ethanol, water and hydrochloric acid are in accordance with 1:10:3.5:10 -4 After mixing in a volume ratio of, the hydrolyzed product of the modified silica sol is obtained. The hydrolyzed product of polymethyltriethoxysilane and ammonia w...
Embodiment 3
[0048] The preparation method of the non-depulverizing elastic aerogel-coated long fiber composite material of this embodiment includes the following steps:
[0049] S1, the molar ratio of ethyl orthosilicate, ethanol, water and hydrochloric acid is 1:18:4:10 -5 Mix in sequence and stir evenly to obtain the hydrolysis product of ethyl orthosilicate; mix the hydrolysis product of ethyl orthosilicate and acidic silica sol at room temperature at a volume ratio of 10:1 to obtain the first mixture; acidic silica Commercially available Si-28 was used as the sol. Then ethanol was used to adjust the molar content of silicon in the first mixture to 10%.
[0050] S2, the modified silica sol adopts dimethyldiethoxysilane, and the dimethyldiethoxysilane, ethanol, water and hydrochloric acid are in accordance with 1:18:4:10 -5 After mixing in a volume ratio of, the hydrolyzed product of the modified silica sol is obtained. The second mixture is obtained by mixing the hydrolysate of dimethyldie...
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