1. Key Laboratory of Polymer Materials of Gansu Province, Research Center of Gansu Military and Civilian Integration Advanced Structural Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Anning East Road 967, Lanzhou, Gansu, 730070, P. R. China
2. Deputy Director-General of Gansu Natural Energy Research Institute, Renmin Road 23, Lanzhou, Gansu, P. R. China