Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 46, Pages 25586-25591Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b09199
Keywords
silicones; elastomers; zwitterionic polymers; fouling-resistance; biofouling
Funding
- ONR [N00014-13-1-0828, N00014-12-10642, N00014-14-1-0336, N00014-12-1-0365, N00014-11-1-0180]
- NSF's Research Triangle MRSEC [DMR-1121107]
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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-ene 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 (similar to hours) exposure to bacteria and barnacle cyprids. The biofilms that eventually accumulated over prolonged-exposure (similar to days) 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.
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