1. Shaanxi Provincal Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi’an, P.R. China 710021
2. National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an, P.R. China 710021
3. School
of Materials and Chemical Engineering, Xi’an Technological University, Xi’an, P. R. China 710032