1. College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, Sichuan Province, P. R. China
2. Department of Architecture and Environment Engineering, Sichuan Vocational and Technical College, Suining, Sichuan, P. R. China
3. College of Polymer Science & Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, P. R. China