1. Sinopec Petroleum Engineering Co., Ltd., Dongying 257026, P. R. China
2. School of Materials Science and Engineering, Tiangong University, Tianjin 300387, P. R. China
3. PetroChina Changqing Oilfield Company, Oil Production Plant No. 2, Qingyang 745100, P. R. China
4. School of Chemistry and Chemical Engineering, Tiangong University, Tianjin 300387, P. R. China
5. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China