1. State Key Laboratory of Polymer Physics and Chemistry; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun 130022 China
2. University of the Chinese Academy of Sciences; Changchun Branch; Changchun 130022 China
3. School of Materials Science and Engineering; Key Laboratory of Hollow Fiber Membrane Material and Processes of Ministry of Education; Tianjin Polytechnic University; Tianjin 300387 China