1. National Engineering Research Center of Flame Retardant Materials, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
2. State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing 211103, Jiangsu, P. R. China
3. Jiangsu Key Laboratory of Hazardous Chemicals Safety and Control, College of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, China
4. School of Mechatronics, Changwon National University, Changwon 641-773, Republic of Korea