1. School of Automobile and Transportation Engineering, Guangdong Polytechnic Normal University, 510450 Guangzhou, China
2. Institute of Polymer Materials, Friedrich-Alexander-University Erlangen-Nuremberg, Martensstr. 7, 91058 Erlangen, Germany
3. Institute of Biomaterials, Friedrich-Alexander-University Erlangen-Nuremberg, Cauerstr. 6, 91058 Erlangen, Germany
4. School of Chemical Science and Engineering, Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden