Silicone/graphene oxide co-cross-linked aerogels with wide-temperature mechanical flexibility,super-hydrophobicity and flame resistance for exceptional thermal insulation and oil/water separation  

作　　者：Zhao-Hui Zhang Zuan-Yu Chen Yi-Hao Tang Yu-Tong Li Dequan Ma Guo-Dong Zhang Rabah Boukherroub Cheng-Fei Cao Li-Xiu Gong Pingan Song Kun Cao Long-Cheng Tang 

机构地区：[1]College of Material,Chemistry and Chemical Engineering,Key Laboratory of Organosilicon Chemistry and Material Technology of MoE,Hangzhou Normal University,Hangzhou,311121,China [2]China Helicopter Research and Development Institute,Jingdezhen,333001,China [3]Tianjin Helicopter Co.,Ltd.,Tianjin,300308,China [4]Univ.Lille,CNRS,Centrale Lille,Univ.Polytechnique Hauts-de-France,UMR 8520-IEMN,F-59000 Lille,France [5]Centre for Future Materials,University of Southern Queensland,Springfield Campus,QLD,4300,Australia [6]State Key Laboratory of Chemical Engineering,College of Chemical and Biological Engineering,Zhejiang University,Hangzhou,310027,China

出　　处：《Journal of Materials Science & Technology》2022年第19期131-142,共12页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 51973047 and 12002112);the Science Foundation and Technology Project of Zhejiang Province (No. Z22E035302);the Science Foundation and Technology Project of Shandong Province (No. ZR2020LFG004);the Project for Science and Technology Program of Hangzhou (Nos. 20191203B16 and 20201203B136)

摘　　要：Development of multifunctional and high-performance silicone aerogel is highly required for various promising applications.However,unstable cross-linking structure and poor thermal stability of silicone network as well as complicated processing restrict the practical use significantly.Herein,we report a facile and versatile ambient drying strategy to fabricate lightweight,wide-temperature flexible,super-hydrophobic and flame retardant silicone composite aerogels modified with low-content functionalized graphene oxide(FGO).After optimizing silane molecules,incorporation ofγ-aminopropyltriethoxysilane functionalization is found to promote the dispersion stability of GO during the hydrolysis-polymerization process and thus produce the formation of unique strip-like co-cross-linked network.Consequently,the aerogels containing∼2.0 wt%FGO not only possess good cyclic compressive stability under strain of 70%for 100 cycles and outstanding mechanical reliability in wide temperature range(from liquid nitrogen to 350℃),but also display excellent flame resistance and super-hydrophobicity.Further,the optimized silicone/FGO aerogels display exceptional thermal insulating performance superior to pure aerogel and hydrocarbon polymer foams,and they also show efficient oil absorption and separation capacity for var-ious solvents and oil from water.Clearly,this work provides a new route for the rational design and development of advanced silicone composite aerogels for multifunctional applications.

关 键 词：Silicone composite aerogel Functionalized graphene oxide Mechanical robustness Flame resistance SUPER-HYDROPHOBICITY 

分 类 号：TQ427.26[化学工程]