气凝胶
材料科学
复合数
保温
热导率
复合材料
芳纶
聚酰亚胺
傅里叶变换红外光谱
基质(水族馆)
纤维
化学工程
图层(电子)
海洋学
地质学
工程类
作者
Rujing Xue,Guoliang Liu,Fujuan Liu
标识
DOI:10.1016/j.ceramint.2022.08.330
摘要
As a new type of insulation material, aerogels are characterized by a high specific surface area, high porosity, low density and low thermal conductivity, which makes them a new alternative to the use of traditional insulation materials. In this paper, a simple method for preparing aerogel insulation materials is proposed. Specifically, SiO2/PI/AF (aramid fiber) aerogel composite fabrics were successfully obtained by combining coating technology and finishing processes to use tetraethoxysilane (TEOS) as the precursor, polyimide (PI) powder as the reinforcing agent, and nonwoven AF as the substrate. These composite fabrics were characterized using field-emission scanning electron microscopy (FESEM), tensile testing with an Instron 5967, Fourier transform infrared spectroscopy (FT-IR) and thermal infrared imaging. The results show that the composite fabrics exhibited excellent performance and could effectively block heat transfer. Moreover, the thermal conductivity of the front decreased from 4.08 to 3.91 (W/cm·°C) × 10-4. This work provides a novel method for the structural design of thermal insulation clothing.
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