1. Key Laboratory of Bio‐Based Polymeric Materials Technology and Application of Zhejiang province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 P. R. China
2. University of Chinese Academy of Sciences Beijing 100049 P. R. China
3. Institute of Materials Research and Engineering A*STAR (Agency for Science Technology and Research) 2 Fusionopolis Way Innovis Singapore 138634 Singapore