1. Center of Physics of Fibrous Materials, Donghua University, Shanghai 200051, and Zhongyuan University of Technology, Zhengzhou 450007, China
2. Center of Physics of Fibrous Materials, Donghua University, Shanghai 2000, China,
3. Center of Physics of Fibrous Materials, Donghua University, Shanghai 2000, China. and Division of Textiles and Clothing, Biological and Agriculture Engineering Department, and University of California, Davis, CA 95616, U.S.A.