Cellulose nanofibril (CNF) based aerogels prepared by a facile process and the investigation of thermal insulation performance
作者： Shuai Jiang , Meiling Zhang , Mengmeng Li , Liu Liu , Lifang Liu
DOI: 10.1007/S10570-020-03224-4
关键词: Thermal conductivity 、 Thermal insulation 、 Aerogel 、 Materials science 、 Fumed silica 、 Chemical engineering 、 Porosity 、 Composite number 、 Ternary operation 、 Cellulose
摘要: Herein, a facile method on fabricating aerogels with hierarchical porous structures was created by freeze-drying the cellulose nanofibril (CNF)/methyltrimethoxysilan (MTMS)/fumed silica (FS) suspension. FS introduced for its structure, which could improve thermal insulation performance of freeze-dried aerogels. The as-prepared were hydrophobic improved mechanical properties (elastic recovery rate up to 99.7%) and reduced conductivity (0.027 Wm−1 K−1 at 25 °C). Most importantly, addition proved stability efficiently in different values relative humidity (RH) temperatures. pure CNF aerogel conditioned 25 °C 95% RH 196% higher than that fully-dried one, while increase 56% composite aerogel. Besides, 30% RH, increased 24% when tested from 20 60 °C only 2% Moreover, tert-butanol used as solvent optimize distribution pores aerogels, their further improved. Our work provides easily available CNF/MTMS/FS ternary are stable changing environment.
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