1. College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
2. National Engineering Laboratory of Clean Technology of Leather Manufacture, Sichuan University, Chengdu 610065, China
3. The Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu 610065, China
4. The State Key Laboratory of Hydraulic and Mountain River Engineering, Sichuan University, Chengdu 610065, China