Preparation, heat resistance and mechanical properties of silica aerogel/aluminum silicate composite fiber paper

doi:10.19936/j.cnki.2096-8000.20231228.006

Abstract

Abstract: Aluminosilicate fiber paper is a traditional kind of thermal insulation material. When it is used at a relatively high temperature, its structure easily collapses, resulting in the significantly deteriorated mechanical properties. In this paper, silica (SiO₂) aerogel/aluminum silicate composite fiber papers were prepared on the structure of aluminum silicate fibers with SiO₂ aerogel by a sol gel process. The heat resistance of the as-prepared composite fiber papers was obvious increased from 800 ℃ to 1 100 ℃, and their structures began to collapse until 1 100 ℃. The tensile strength of the SiO₂ aerogel/aluminum silicate composite fiber papers was increased from 9.01 MPa to 20.41 MPa, and the elongation at break was increased from 2.36% to 3.52%. By comparing the micro morphology of the composite fiber papers prepared under different pH (8, 9 and 10), the combination between the SiO₂ aerogels and aluminum silicate fiber was the best at pH of 8.

Key words: silica aerogel, aluminum silicate fiber paper, composite materials, heat resistance, mechanical properties

CLC Number:

TB332

HOU Yu, SONG Zixuan, XUE Jundong, ZHANG Guotao, WU Jianfeng, TANG Xiuping. Preparation, heat resistance and mechanical properties of silica aerogel/aluminum silicate composite fiber paper[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(12): 44-49.

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