1. College of Polymer Science and Engineering
2. State Key Laboratory of Polymer Materials Engineering
3. Sichuan University
4. Chengdu 610065, P. R. China
5. Department of Orthopedics
6. Second Hospital of Jilin University
7. Changchun 130041, P. R. China
8. Key Laboratory of Polymer Ecomaterials
9. Changchun Institute of Applied Chemistry
10. Chinese Academy of Sciences
11. Changchun 130022, P. R. China