1. Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China
2. Materials & Textile Engineering College, Jiaxing University, Jiaxing 314001, China
3. Leather Research Department, The Research and Development National Institute for Textiles and Leather-Division Leather and Footwear Research Institute, 93, Ion Minulescu Str, Bucharest 031215, Romania