1. College of Chemistry and Chemical Engineering, Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry & Technology, Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education Shaanxi Key Laboratory of Chemical Additives for Industry Shaanxi University of Science and Technology Xi'an 710021 P. R. China
2. Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi'an 710072 P. R. China