Fabrication of poly(vinylidene fluoride) membrane via thermally induced phase separation using ionic liquid as green diluent  

作　　者：Xiaozu Wang Xiaogang Li Juan Yue Yangming Cheng Ke Xu Qian Wang Fan Fan Zhaohui Wang Zhaoliang Cui 

机构地区：[1]State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China [2]Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM),Nanjing Tech University,Nanjing 210009,China [3]National Engineering Research Center for Special Separation Membrane,Nanjing Tech University,Nanjing 210009,China

出　　处：《Chinese Journal of Chemical Engineering》2020年第5期1415-1423,共9页中国化学工程学报（英文版）

基　　金：the financial support of the National Natural Science Foundation of China(Grant No.21606125);the Natural Science Foundation of Jiangsu Province(Grant No.BK20160984);the National Key R&D Program of China(Grant No.2017YFC0403702);the Materials-Oriented Chemical Engineering State Key Laboratory Program(KL16-09);the open project program of Jiangsu Key Lab for Chemistry of Low-Dimensional Materials(JSKC17005);the Priority Academic Program Development of Jiangsu Higher Education Institution(PAPD)。

摘　　要：Ionic liquid(IL),1-butyl-3-methylimidazolium hexafluorophosphate([BMIM]PF6)as a new and environmentally friendly diluent was introduced to prepare poly(vinylidene fluoride)(PVDF)membranes via thermally induced phase separation(TIPS).Phase diagram of PVDF/[BMIM]PF6 was measured.The effects of polymer concentration and quenching temperature on the morphologies,properties,and performances of the PVDF membranes were investigated.When the polymer concentration was 15 wt%,the pure water flux of the fabricated membrane was up to nearly 2000 L·m-2·h-1,along with adequate mechanical strength.With the increasing of PVDF concentration and quenching temperature,mean pore size and water permeability of the membrane decreased.SEM results showed that PVDF membranes manufactured by ionic liquid(BMIm PF6)presented spherulite structure.And the PVDF membranes were represented asβphase by XRD and FTIR characterization.It provides a new way to prepare PVDF membranes with piezoelectric properties.

关 键 词：Ionic liquid Poly(vinylidene fluoride)membrane Thermally induced phase separation 

分 类 号：TQ051.893[化学工程]