1. State Key Laboratory of Hollow Fiber Membrane Materials and Processes; School of Environmental and Chemical Engineering; Tianjin Polytechnic University; 399 Binshuixi Rd. Tianjin PR China 300387
2. State Key Laboratory of Hollow Fiber Membrane Materials and Processes; Department of Materials Science and Engineering; Tianjin Polytechnic University; 399 Binshuixi Rd. Tianjin PR China 300387