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High-temperature-resistant heat-insulation electrical-property-controllable fibrofelt-reinforced aerogel composite material and preparation method thereof
The invention discloses a high-temperature-resistant thermal-insulation electrical-property-controllable fibrofelt reinforced aerogel composite material and a preparation method thereof.The preparation method includes the steps that silicon carbide fibers are subjected to plasma surface treatment and then added into nano dispersion liquid to obtain fiber suspension liquid, and the fiber suspension liquid is subjected to dehydration forming, drying and curing to obtain a silicon carbide fibrofelt; the preparation method comprises the following steps: mixing tetraethoxysilane and ethanol to obtain a mixed solution, sequentially adding concentrated sulfuric acid and ammonia water into the mixed solution to form sol, immersing the silicon carbide fiber felt into the sol, standing, and aging gel to obtain a silicon carbide fiber felt-silicon dioxide wet gel composite material; and soaking the silicon carbide fiber felt-silicon dioxide wet gel composite material in an organic solvent for hydrophobic modification, and drying to obtain the fiber felt reinforced aerogel composite material. The composite material has the performance characteristics of high temperature resistance, high sound insulation, low density and low heat conductivity.
本发明公开了一种耐高温隔热电性能可控纤维毡增强气凝胶复合材料及其制备方法，将碳化硅纤维进行等离子体表面处理后，加入纳米分散液中，获得纤维悬浮液，将纤维悬浮液进行脱水成型、干燥、固化获得碳化硅纤维毡；将正硅酸乙酯与乙醇混合获得混合溶液，向混合溶液中依次加入浓硫酸、氨水，形成溶胶，将碳化硅纤维毡浸入溶胶中静置，然后凝胶老化，获得碳化硅纤维毡‑二氧化硅湿凝胶复合材料；再将碳化硅纤维毡‑二氧化硅湿凝胶复合材料置于有机溶剂中浸泡进行疏水改性，然后干燥即得纤维毡增强气凝胶复合材料；本发明中的复合材料具有耐高温、高隔声、低密度、低导热的性能特征。
High-temperature-resistant heat-insulation electrical-property-controllable fibrofelt-reinforced aerogel composite material and preparation method thereof
The invention discloses a high-temperature-resistant thermal-insulation electrical-property-controllable fibrofelt reinforced aerogel composite material and a preparation method thereof.The preparation method includes the steps that silicon carbide fibers are subjected to plasma surface treatment and then added into nano dispersion liquid to obtain fiber suspension liquid, and the fiber suspension liquid is subjected to dehydration forming, drying and curing to obtain a silicon carbide fibrofelt; the preparation method comprises the following steps: mixing tetraethoxysilane and ethanol to obtain a mixed solution, sequentially adding concentrated sulfuric acid and ammonia water into the mixed solution to form sol, immersing the silicon carbide fiber felt into the sol, standing, and aging gel to obtain a silicon carbide fiber felt-silicon dioxide wet gel composite material; and soaking the silicon carbide fiber felt-silicon dioxide wet gel composite material in an organic solvent for hydrophobic modification, and drying to obtain the fiber felt reinforced aerogel composite material. The composite material has the performance characteristics of high temperature resistance, high sound insulation, low density and low heat conductivity.
本发明公开了一种耐高温隔热电性能可控纤维毡增强气凝胶复合材料及其制备方法，将碳化硅纤维进行等离子体表面处理后，加入纳米分散液中，获得纤维悬浮液，将纤维悬浮液进行脱水成型、干燥、固化获得碳化硅纤维毡；将正硅酸乙酯与乙醇混合获得混合溶液，向混合溶液中依次加入浓硫酸、氨水，形成溶胶，将碳化硅纤维毡浸入溶胶中静置，然后凝胶老化，获得碳化硅纤维毡‑二氧化硅湿凝胶复合材料；再将碳化硅纤维毡‑二氧化硅湿凝胶复合材料置于有机溶剂中浸泡进行疏水改性，然后干燥即得纤维毡增强气凝胶复合材料；本发明中的复合材料具有耐高温、高隔声、低密度、低导热的性能特征。
High-temperature-resistant heat-insulation electrical-property-controllable fibrofelt-reinforced aerogel composite material and preparation method thereof
一种耐高温隔热电性能可控的纤维毡增强气凝胶复合材料及其制备方法
HUANG XIAOZHONG (author) / ZHOU GONGCHENG (author) / TANG YUN (author) / WANG CHUNQI (author)
2024-05-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Aerogel-modified fibrofelt heat insulation composite and preparation method thereof
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