1. State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science & Technology, Wuhan 430074, P. R. China
2. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16801, United States
3. Henan Key Laboratory of Medical Polymer Materials Technology and Application, TuoRen Medical Device Research & Development Institute Co., Ltd., Health Technology Industry Park Changyuan County, Henan 453000, P. R. China