Applied Physical Chemistry, University of Heidelberg , 69120 Heidelberg, Germany.
ACS Appl Mater Interfaces. 2013 Oct 23;5(20):10074-80. doi: 10.1021/am402635p. Epub 2013 Oct 10.
Marine biofouling is a longstanding problem because of the constant challenges placed by various fouling species and increasingly restricted environmental regulations for antifouling coatings. Novel nonbiocidal strategies to control biofouling will necessitate a multifunctional approach to coating design. Here we show that slippery liquid-infused porous surfaces (SLIPSs) provide another possible strategy to obtaining promising antifouling coatings. Microporous butyl methacrylate-ethylene dimethacrylate (BMA-EDMA) surfaces are prepared via UV-initiated free-radical polymerization. Subsequent infusion of fluorocarbon lubricants (Krytox103, Krytox100, and Fluorinert FC-70) into the porous microtexture results in liquid-repellent slippery surfaces. To study the interaction with marine fouling organisms, settlement of zoospores of the alga Ulva linza and cypris larvae of the barnacle Balanus amphitrite is tested in laboratory assays. BMA-EDMA surfaces infused with Krytox103 and Krytox100 exhibit remarkable inhibition of settlement (attachment) of both spores and cyprids to a level comparable to that of a poly(ethylene glycol) (PEG)-terminated self-assembled monolayer. In addition, the adhesion strength of sporelings (young plants) of U. linza is reduced for BMA-EDMA surfaces infused with Krytox103 and Krytox100 compared to pristine (noninfused) BMA-EDMA and BMA-EDMA infused with Fluorinert FC-70. Immersion tests suggest a correlation between the stability of slippery coatings in artificial seawater and fouling resistance efficacy. The results indicate great potential for the application of this concept in fouling-resistant marine coatings.
海洋生物附着是一个长期存在的问题，因为各种附着生物不断带来挑战，而且对防污涂料的环境法规限制越来越严格。控制生物附着的新型非杀生策略将需要对涂料设计采用多功能方法。在这里，我们展示了滑液注入多孔表面（SLIPS）为获得有前途的防污涂料提供了另一种可能的策略。通过紫外光引发的自由基聚合制备微孔甲基丙烯酸丁酯-乙二醇二甲基丙烯酸酯（BMA-EDMA）表面。随后将氟碳润滑剂（Krytox103、Krytox100 和 Fluorinert FC-70）注入多孔微纹理中，得到疏液滑表面。为了研究与海洋附着生物的相互作用，在实验室试验中测试了绿藻 U. linza 的游动孢子和藤壶幼虫 B. amphitrite 的附卵的附着。用 Krytox103 和 Krytox100 注入的 BMA-EDMA 表面显示出对游动孢子和附卵的附着（附着）的显著抑制作用，其抑制水平可与聚（乙二醇）（PEG）终止的自组装单层相当。此外，与原始（未注入）BMA-EDMA 和注入 Fluorinert FC-70 的 BMA-EDMA 相比，用 Krytox103 和 Krytox100 注入的 BMA-EDMA 表面的 U. linza 孢子的附着强度降低。浸泡试验表明，在人工海水中滑润涂层的稳定性与抗污效果之间存在相关性。结果表明，该概念在防污海洋涂料中的应用具有很大的潜力。
