1. Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
2. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, 30 Puzhu Road South, Nanjing 211816, China
3. Department of Chemistry, KTH Royal Institute of Technology, Teknikringen 30, Stockholm 10044, Sweden