期刊
CHEMICAL ENGINEERING JOURNAL
卷 401, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125937
关键词
Xerogels; Copolymer emulsion; Organic-inorganic hybrid; Mechanical robustness; Ambient-pressure drying
资金
- National Natural Science Foundation of China [51573194, 51522308]
- China Postdoctoral Science Foundation [2016M590814]
In this study, we report a convenient one-pot synthesis of silsesquioxane hybrid xerogels with excellent mechanical flexibility by using copolymer emulsion as templates. During the acid-catalyzed sol-gel process of the precursors, the random copolymers of n-butyl methacrylate (n-BMA) and hydroxyethyl methacrylate (HEMA), not only suppressed macroscopic phase separation but also were incorporated in the skeleton of polysilsesquioxane by synergistic physical and chemical interactions. The resultant gels could be directly dried via ambient-pressure drying (APD) to gain xerogels without visible volume shrinkage. This unique preparation process is economical and environment-friendly without involving any organic solvents. The morphology and physicochemical performance of the monolithic hybrid xerogels can be readily tailored by changing the compositions and the concentrations of silsesquioxanes and copolymers in the reaction solutions. Xerogels fabricated from methyltrimethoxysilane showed excellent thermal insulation property, inherently superhydrophobicity, and outstanding mechanical strength against compression up to 50 MPa. Besides, the compressed specimen could recover its original shape by immersing in solvents and subsequently drying.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据