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Ultralight, Highly Flexible in Situ Thermally Crosslinked Polyimide Aerogels with Superior Mechanical and Thermal Protection Properties via Nanofiber Reinforcement by Yu Pan; Jin Zheng; Yangyang Xu; Xiaogang Chen; Mengmeng Yan; Jinlei Li; Xu Zhao; Yanlai Feng; Yuhan Ma; Mengyuan Ding; Rongwu Wang; Jianxin He is a Chemistry article available to read on EtoBox.

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## Hypothesis: Advanced thermal-insulation materials for human use in high-temperature and ultra-low-temperature environments have received extensive attention. however, facile synthesis of aerogels with excellent mechanical and thermal properties via freeze-drying or electrospinning alone is still challenging. we hypothesized that a polyimide aerogel with high mechanical strength and good thermal-insulation performance and suitability for various applications at high and low temperatures could be prepared facilely using a simple and novel preparation strategy that combines electrospinning, freeze-drying, and in situ thermal crosslinking. ## Experiments: Polyamideimide (pai) nanofibers loaded with bismaleimide (bmi) were electrospun and dispersed into a polyamic acid aqueous solution. pai/bmi-nanofiber-reinforced polyimide (ibnr-pi) aerogels with an interpenetrating network structure were prepared by freeze-drying and heat treatment. ## Findings: The ibnr-pi aerogels possessed extremely low volume density (26 mg cm) and high porosity (94.92%). most importantly, they showed high tensile strength and good compressive fatigue resistance with plastic deformation of only 7% after 1000 c

Who reads Ultralight, Highly Flexible in Situ Thermally Crosslinked Polyimide Aerogels with Superior Mechanical and Thermal Protection Properties via Nanofiber Reinforcement?

Author

Yu Pan; Jin Zheng; Yangyang Xu; Xiaogang Chen; Mengmeng Yan; Jinlei Li; Xu Zhao; Yanlai Feng; Yuhan Ma; Mengyuan Ding; Rongwu Wang; Jianxin He

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Chemistry (Physical Sciences)