1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou ,Guangdong Province 510640, China
2. College of Materials and Energy, South China Agricultural University, Guangzhou 510640, PR China
3. Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong SAR 999077, PR China
4. Cellulose &Paper Dept., National Research Centre, El Buhouth St. Dokki,Giza 12622, Egypt