1. State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou Guangdong 510641 P. R. China
2. School of Science and Engineering The Chinese University of Hong Kong Shenzhen Guangdong 518175 P. R. China
3. Center for Lignocellulosic Chemistry and Biomaterials College of Light Industry and Chemical Engineering Dalian Polytechnic University Dalian Liaoning 116034 P. R. China