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  • Title: Anticoagulant surface of 316 L stainless steel modified by surface-initiated atom transfer radical polymerization.
    Author: Guo W, Zhu J, Cheng Z, Zhang Z, Zhu X.
    Journal: ACS Appl Mater Interfaces; 2011 May; 3(5):1675-80. PubMed ID: 21528878.
    Abstract:
    Polished 316 L stainless steel (SS) was first treated with air plasma to enhance surface hydrophilicity and was subsequently allowed to react with 2-(4-chlorosulfonylphenyl)ethyltrimethoxysilane to introduce an atom transfer radical polymerization (ATRP) initiator. Accordingly, the surface-initiated atom transfer radical polymerization of polyethylene glycol methacrylate (PEGMA) was carried out on the surface of the modified SS. The grafting progress was monitored by water contact angle measurements, X-ray photoelectron spectroscopy and atomic force microscopy. The polymer thickness as a function different polymerization times was characterized using a step profiler. The anticoagulative properties of the PEGMA modified SS surface were investigated. The results showed enhanced anticoagulative to acid-citrate-dextrose (ACD) blood after grafting PEGMA on the SS surface.
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