1. Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Kobe 6578501, Japan
2. College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
3. Department of Chemical Engineering, University of Bath, Bath BA27AY, U.K.
4. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, P. R. China
5. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, P. R. China