Modification of Silicone Elastomer Surfaces with Zwitterionic Polymers: Short-Term Fouling Resistance and Triggered Biofouling Release

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• 作者：Phanindhar Shivapooja ; Qian Yu ; Beatriz Orihuela ; Robin Mays ; Daniel Rittschof ; Jan Genzer ; Gabriel P. L贸pez
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：November 25, 2015
• 年：2015
• 卷：7
• 期：46
• 页码：25586-25591
• 全文大小：366K
• ISSN：1944-8252

文摘

We present a method for dual-mode-management of biofouling by modifying surface of silicone elastomers with zwitterionic polymeric grafts. Poly(sulfobetaine methacrylate) was grafted from poly(vinylmethylsiloxane) elastomer substrates using thiol鈭抏ne click chemistry and surface-initiated, controlled radical polymerization. These surfaces exhibited both fouling resistance and triggered fouling-release functionality. The zwitterionic polymers exhibited fouling resistance over short-term (鈭糷ours) exposure to bacteria and barnacle cyprids. The biofilms that eventually accumulated over prolonged-exposure (鈭糳ays) were easily detached by applying mechanical strain to the elastomer substrate. Such dual-functional surfaces may be useful in developing environmentally and biologically friendly coatings for biofouling management on marine, industrial, and biomedical equipment because they can obviate the use of toxic compounds.