Preparation and Characterization of Polyimide Fiber Reinforced Silica Aerogel
GAO Wenjie1,2, YANG Zichun1,2, LI Kunfeng1,2, FEI Zhifang1,2, CHEN Guobing1,2, ZHAO Shuang1,2
1 Institute of High Temperature Structural Composite Materials of Naval Ship,Naval University of Engineering,Wuhan 430033; 2 School of Power Engineering,Naval University of Engineering,Wuhan 430033
Abstract: The PI fiber-reinforced SiO2 aerogel composite was prepared by sol-gel method and supercritical drying, taking tetraethylorthosilicate (TEOS) as silicon source and polyimide (PI) fiber as the reinforcing phase. The Fourier transform infrared spectroscopy, N2 adsorption desorption spectrometer, field emission scanning electron microscope, universal testing machine, TGA and thermal conductivity meter were adopted to cha-racterize the chemical composition, microstructure, mechanical properties and thermal properties of the SiO2 aerogels. The obtained aerogel pre-sents low density and high surface area, as well as favorable thermal insulation, thermal stability and compressibility. When 3wt% PI fiber is ad-ded, the aerogel shows satisfactory properties with density of 0.13 g/cm3, specific surface area of 997 m2/g and average pore diameter of 18.2 nm. And it also exhibits good thermal conductivity (0.029 1 W/(m·K)) at room temperature, a 5% mass loss in the range of room temperature to 500 ℃ and compressive strength of 0.21 MPa. The low density, high specific surface area, good thermal insulation and mechanical properties of the aerogel enable its broad application prospects in the field of ship thermal insulation.
作者简介: 高文杰,海军工程大学硕士研究生,主要从事舰船绝热防护材料的相关研究。杨自春,海军工程大学动力工程学院教授、博士研究生导师。1989年7月本科毕业于海军工程学院轮机系,1996年9月取得华中科技大学固体力学专业博士学位,2013年4月至2013年10月在美国加州大学欧文分校作高级访问学者。获国家科技进步奖二等奖1项,军队科技进步奖一等奖2项、二等奖1项,先后入选教育部“新世纪优秀人才支持计划”,“新世纪百千万人才工程”国家级人选,军队高层次科技创新人才工程学科领军人才培养对象等。近年来在Journal of the American Ceramic Society、Ceramics International等期刊发表研究论文100余篇。
引用本文:
高文杰, 杨自春, 李昆锋, 费志方, 陈国兵, 赵爽. 聚酰亚胺纤维增强SiO2气凝胶的制备及表征[J]. 材料导报, 2019, 33(4): 714-718.
GAO Wenjie, YANG Zichun, LI Kunfeng, FEI Zhifang, CHEN Guobing, ZHAO Shuang. Preparation and Characterization of Polyimide Fiber Reinforced Silica Aerogel. Materials Reports, 2019, 33(4): 714-718.
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2019, Vol. 33 
