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A platform for research: civil engineering, architecture and urbanism
Preparation method of fiber-reinforced silicon dioxide aerogel
The invention provides a preparation method of fiber-reinforced silicon dioxide aerogel. According to the invention, tetraethoxysilane and alkoxy silane are used as a mixed precursor, deionized wateris used as reactant, absolute ethyl alcohol is used as a cosolvent, HCl with a concentration of 0.1 mol/L and NH3.H2O with a concentration of 0.5 mol/L are used as acid-base catalysts, 0.8% of fiberswith a length of 1 mm are added to reinforce the structure of a silicon dioxide aerogel, and the fiber-reinforced silicon dioxide aerogel is prepared by adopting a sol-gel/normal-pressure drying method. The fiber-reinforced silicon dioxide aerogel prepared by the preparation method disclosed by the invention is high in hydrophobicity and stable in structure, and has excellent mechanical strength and toughness.
本发明提出一种纤维增强二氧化硅气凝胶的制备方法，以正硅酸乙酯和烷氧基硅烷为混合前驱体，去离子水为反应物，无水乙醇为助溶剂，0.1mol·LHCl和0.5mol·L‑1NH·HO为酸碱催化剂，添加0.8％长度为1mm的纤维进行SiO气凝胶结构增强，采用溶胶凝胶‑常压干燥法制备纤维增强SiO气凝胶。本发明的制备方法制得的纤维增强二氧化硅气凝胶，疏水性强，结构稳定，具有优异的力学强度和韧性。
Preparation method of fiber-reinforced silicon dioxide aerogel
The invention provides a preparation method of fiber-reinforced silicon dioxide aerogel. According to the invention, tetraethoxysilane and alkoxy silane are used as a mixed precursor, deionized wateris used as reactant, absolute ethyl alcohol is used as a cosolvent, HCl with a concentration of 0.1 mol/L and NH3.H2O with a concentration of 0.5 mol/L are used as acid-base catalysts, 0.8% of fiberswith a length of 1 mm are added to reinforce the structure of a silicon dioxide aerogel, and the fiber-reinforced silicon dioxide aerogel is prepared by adopting a sol-gel/normal-pressure drying method. The fiber-reinforced silicon dioxide aerogel prepared by the preparation method disclosed by the invention is high in hydrophobicity and stable in structure, and has excellent mechanical strength and toughness.
本发明提出一种纤维增强二氧化硅气凝胶的制备方法，以正硅酸乙酯和烷氧基硅烷为混合前驱体，去离子水为反应物，无水乙醇为助溶剂，0.1mol·LHCl和0.5mol·L‑1NH·HO为酸碱催化剂，添加0.8％长度为1mm的纤维进行SiO气凝胶结构增强，采用溶胶凝胶‑常压干燥法制备纤维增强SiO气凝胶。本发明的制备方法制得的纤维增强二氧化硅气凝胶，疏水性强，结构稳定，具有优异的力学强度和韧性。
Preparation method of fiber-reinforced silicon dioxide aerogel
一种纤维增强二氧化硅气凝胶的制备方法
LI XIAOYU (author) / LI XIAOJIN (author) / WANG JIANGUO (author) / LIU JING (author) / XIAO LIFENG (author)
2020-07-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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