期刊
MATERIALS LETTERS
卷 176, 期 -, 页码 118-121出版社
ELSEVIER
DOI: 10.1016/j.matlet.2016.04.099
关键词
Porous materials; Polyimide aerogels; Thermal insulation; Sol-gel preparation
资金
- National High Technology R&D Program of China [2013AA031801]
- National Natural Science Foundation of China [51172163]
Hydrophobic polyimide aerogels with high solubility were prepared by combining sol-gel technology and supercritical CO2 extraction. Polyimide gels were derived from hybrid diamines 4, 4'-oxydianiline (ODA) and 2, 2-Bis [4-(4-aMinophenoxy) phenyl] propane (BAPP) with chemical imidization. Introduction of BAPP enhanced the hydrophobicity and water resistance of the obtained polyimide aerogels, as well as the solution-process ability. Overall, the obtained polyimide aerogels have low thermal conductivity in the range of 0.032-0.059 W/mK. Comparing to the conventional polyimide aerogels, solution-processable polyimide aerogels with high hydrophobicity are more applicable as thermal insulators in harsh environments. (C) 2016 Elsevier B.V. All rights reserved.
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