1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China, Nanomaterials Research Center, Modern Textile Institute, Donghua University, Shanghai 200051, China, College of Textiles, Donghua University, Shanghai 201620, China, and Fibers and Polymer Science, University of California, Davis, California 95616