1. Center of Advanced Elastomer Materials; State Key Laboratory of Organic-Inorganic Composites; College of Materials Science and Engineering; Beijing University of Chemical Technology; Beijing 100029 P.R. China
2. Beijing Laboratory of Biomedical Materials; Beijing University of Chemical Technology; Beijing 100029 P.R. China
3. Laboratory of Bone Tissue Engineering of Beijing Research Institute of Traumatology and Orthopaedics; Beijing 100035 P.R. China