1. Key Laboratory for Macromolecular Science of Shaanxi Province
2. School of Materials Science and Engineering
3. Shaanxi Normal University
4. Xi'an
5. P. R. China
6. CAS Key Laboratory of Bio-based Materials
7. Qingdao Institute of Bioenergy and Bioprocess Technology
8. Chinese Academy of Sciences
9. Qingdao 266101
10. P.R. China
11. Department of Chemistry
12. National Central University
13. Chung-Li 32001
14. Taiwan