1. Hunan Institute of Engineering, College of Materials and Chemical Engineering, Xiangtan 411104, China
2. The Third Oil Production Plant of Changqing Oilfield Company, Yinchuan 750006, China
3. Gas Production Plant 2 of Changqing Oilfield Company, Yulin 719000, China
4. Hunan Nanofilm New Material Technology Co., Ltd., Changsha 410200, China