1. Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an 710021, P. R. China
2. National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi’an 710021, P. R. China
3. School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an 710021, P. R. China