Biomaterials Research (생체재료학회지)

Korean Society for Biomaterials (한국생체재료학회)
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Sulfobetaine methacrylate hydrogel-coated anti-fouling surfaces for implantable biomedical devices

  • Lee, Se Yeong (Department of Molecular Science and Technology, Ajou University) ;
  • Lee, Yunki (Department of Molecular Science and Technology, Ajou University) ;
  • Thi, Phuong Le (Department of Molecular Science and Technology, Ajou University) ;
  • Oh, Dong Hwan (Department of Molecular Science and Technology, Ajou University) ;
  • Park, Ki Dong (Department of Molecular Science and Technology, Ajou University)
  • Received : 2017.11.23
  • Accepted : 2017.12.20
  • Published : 2018.03.01
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Abstract

Background: Zwitterionic molecules have been widely studied as coating materials for preparing anti-fouling surfaces because they possess strong hydration properties that can resist non-specific protein adsorption. Numerous studies on surface modification using zwitterionic molecules have been investigated, such as electrochemically mediated and photoinitiated radical polymerization. However, these methods have some limitations, including multi-step process, difficulties in producing thick and dense layers as well as the requirement of extra facilities. In this study, we report a novel zwitterionic hydrogel-coating method via Fenton reaction for the preparation of anti-fouling surfaces. Methods: Sulfobetaine methacrylate (SBMA) hydrogel was coated on polyurethane (PU) by polymerization of SBMA molecules via the Fenton reaction. The coated surfaces were characterized by the measurements of water contact angle, SEM and XPS. The anti-fouling properties of the modified surfaces were evaluated by reductions of fibrinogen absorption and cell (human dermal fibroblasts, hDFBs) adhesion. Results: SBMA hydrogel layers were coated on the PU substrates and these layers have a high affinity for water. The hydrogel coatings were highly stable for 7 days, without a significant change in surface wettability. Importantly, the hydrogel-coated PU substrates decrease 80% of surface-adsorbed fibrinogen and surface-attached hDFBs (compared with uncoated PU substrates), indicating the excellent anti-fouling activities of modified surfaces. Conclusions: The hydrogel-coated PU surfaces prepared by Fenton reaction with anti-fouling properties could have potential uses for implantable biomedical devices.

Keywords

Acknowledgement

Grant : Development of functionalized hydrogel scaffold based on medical grade biomaterials with 30% or less of molecular weight reduction

Supported by : NRF, KEIT

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