1. State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, P. R. China
2. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
3. State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China