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Zhao Y, Wu Z, Chen L, Shu X, Guan J, Yang K, Shi R, Li Y, Numata K, Shao Z. Restructuring the Interface of Silk-Polycaprolactone Biocomposites Using Rigid-Flexible Agents. Biomacromolecules 2023; 24:332-343. [PMID: 36562543 DOI: 10.1021/acs.biomac.2c01162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Natural fiber-reinforced biocomposites with excellent mechanical and biological properties have attractive prospects for internal medical devices. However, poor interfacial adhesion between natural silk fiber and the polymer matrix has been a disturbing issue for such applications. Herein, rigid-flexible agents, such as polydopamine (PDA) and epoxy soybean oil (ESO), were introduced to enhance the interfacial adhesion between Antheraea pernyi (Ap) silk and a common medical polymer, polycaprolactone (PCL). We compared two strategies of depositing PDA first (Ap-PDA-ESO) and grafting ESO first (Ap-ESO-PDA). The rigid-flexible interfacial agents introduced multiple molecular interactions at the silk-PCL interface. The "Ap-PDA-ESO" strategy exhibited a greater enhancement in interfacial adhesion, and interfacial toughening mechanisms were proposed. This work sheds light on engineering strong and tough silk fiber-based biocomposites for biomedical applications.
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Affiliation(s)
- Yan Zhao
- International Research Center for Advanced Structural and Biomaterials, School of Materials Science & Engineering, Beihang University, Beijing100191, People's Republic of China
| | - Zihong Wu
- International Research Center for Advanced Structural and Biomaterials, School of Materials Science & Engineering, Beihang University, Beijing100191, People's Republic of China
| | - Lei Chen
- Beijing Research Institute of Orthopedics and Traumatology, Beijing Jishuitan Hospital, Beijing100035, People's Republic of China
| | - Xiong Shu
- Beijing Research Institute of Orthopedics and Traumatology, Beijing Jishuitan Hospital, Beijing100035, People's Republic of China
| | - Juan Guan
- International Research Center for Advanced Structural and Biomaterials, School of Materials Science & Engineering, Beihang University, Beijing100191, People's Republic of China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing100083, People's Republic of China
| | - Kang Yang
- School of Materials Science and Engineering, Anhui University of Technology, Maanshan243002, People's Republic of China
| | - Ruya Shi
- International Research Center for Advanced Structural and Biomaterials, School of Materials Science & Engineering, Beihang University, Beijing100191, People's Republic of China
| | - Yibin Li
- International Research Center for Advanced Structural and Biomaterials, School of Materials Science & Engineering, Beihang University, Beijing100191, People's Republic of China
| | - Keiji Numata
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako-shi, Saitama351-0198, Japan.,Department of Material Chemistry, Kyoto University, Kyotodaigaku Katsura, Nishikyo-ku, Kyoto615-8510, Japan
| | - Zhengzhong Shao
- State Key Laboratory of Molecular Engineering of Polymers, Laboratory of Advanced Materials and Department of Macromolecular Science, Fudan University, Shanghai200433, People's Republic of China
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