1. School of Materials Science & Engineering South China University of Technology Guangzhou 510006 China
2. Department of Colorectal Surgery, The Sixth Affiliated Hospital Sun Yat‐Sen University Guangzhou 510655 China
3. National Engineering Research Center for Tissue Restoration and Reconstruction South China University of Technology Guangzhou 510006 China
4. Key Laboratory of Biomedical Engineering of Guangdong Province South China University of Technology Guangzhou 510006 China
5. Department of Chemistry The Hong Kong University of Science and Technology Clear Water Bay Hong Kong China