A new approach to produce polystyrene monoliths by gelation and capillary shrinkage

作     者：Dewang Li Yaqian Deng Jingyi Xia Zhitan Wu Tongxin Shang Pei Li Junwei Han Ying Tao Quan-Hong Yang Nanoyang Group State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 李德望;邓亚茜;夏静怡;吴志坦;尚童鑫;李培;韩俊伟;陶莹;杨全红;Nanoyang Group;State Key Laboratory of Chemical Engineering;School of Chemical Engineering and Technology;Tianjin University;Tianjin

作者机构：300350China Shenzhen Key Laboratory for Graphene-Based MaterialsEngineering Laboratory for Functionalized Carbon MaterialsGraduate School at ShenzhenTsinghua UniversityShenzhen 518055China Joint School of National University of Singapore and Tianjin UniversityInternational Campus of Tianjin UniversityFuzhou 350207China 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2021年第64卷第9期

页      面：2272-2279页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Science Fund for Distinguished Young Scholars of China(51525204) the National Natural Science Foundation of China(51702229) 

主　　题：polystyrene monolith demulsification gelation capillary shrinkage 

摘      要：Polymeric monoliths are of great interest in a variety of applications.A new gelation approach to produce a mechanically stable polystyrene(PS)gel directly from its microemulsion is *** produce a PS gel,the as-prepared microemulsion is first demulsified by adding selected watermiscible organic *** small PS latex particles liberated from the surfactant are assembled into a piece of bulk material at an appropriate temperature with a high degree of entanglement of the polymer *** is found that the d2 T/ηvalue is an important parameter to evaluate the gelation ability of the organic solvents and helps determine the gelation ***,PS monoliths are obtained by capillary drying and their pore structures can be effectively tuned by changing the gelation time and the amount of solvent exchanged with *** allows the controlled preparation of bulk PS artefacts with densities in the range of 0.06 to 1.14 g cm^(-3).This simple method of PS monolith production avoids the use of shaping tools or chemical templates,needs less energy,and is a promising alternative approach to design either integrated porous or compact polymer materials.