1. Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Key Laboratory of Advanced Functional Polymer Materials of Colleges and Universities of Hunan Province, Xiangtan University, Xiangtan 411105, P. R. China
2. Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Ministry of Education, Guangxi, Key Laboratory of New Energy and Building Energy Saving, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, P. R. China