Effects of Silica Aerogel Content on Microstructural and Mechanical Properties of Poly(methyl methacrylate)/Silica Aerogel Dual-scale Cellular Foams Processed in Supercritical Carbon Dioxide

作     者：谷晓丽 罗国强 ZHANG Ruizhi ZHANG Jian LI Meijuan SHEN Qiang WANG Jin ZHANG Lianmeng 无

作者机构：State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan 430070 China 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2016年第31卷第4期

页      面：750-756页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：Funded by the National Natural Science Foundation of China(Nos.51521001 and 51572208) the 111 Project(B13035) the National Natural Science Foundation of Hubei Province(Nos.2014CFB257 and 2014CFB258) the Fundamental Research Funds for the Central Universities(WUT:2015Ш059) 

主　　题：silica methacrylate flexural nucleation adding compressive supercritical dioxide synthesize mixing 

摘      要：A novel poly（methyl-methacrylate）/silica aerogel（PMMA/SA） dual-scale cellular foam was synthesized with internal mixing followed by the supercritical carbon dioxide foaming *** effects of silica aerogel content on the microstructural and mechanical performance of the foams were investigated by SEM,TEM analysis,and mechanical *** experimental results suggest that the employment of silica aerogel granule as addictive can distinctly improve the morphological feature as well as the mechanical performance in comparison to neat PMMA foam by uniformizing cell size distribution,decreasing cell size and increasing cell *** dual-scale cells including micrometric cells of 3-10 μm and nanometric cells of about 50 nm existed in the structure of foams resulting from the retained original framework structure of silica aerogel,which has not been described in other studies with the addition of various ***,the mechanical strength was significantly elevated even with a small amount of silica aerogel resulting from the unique microstructure,decreased cell size and enhanced cell *** compressive strength was 18.12 MPa and the flexural strength was 18.90 MPa by adding 5wt% and 2wt% silica aerogel,*** results demonstrate the potential to synthesize PMMA/SA dual-scale cellular foams to be used as structural materials with the advantages of low density and high strength.