Martinelli Elisa, Gunes Deniz, Wenning Brandon M, Ober Christopher K, Finlay John A, Callow Maureen E, Callow James A, Di Fino Alessio, Clare Anthony S, Galli Giancarlo
a Dipartimento di Chimica e Chimica Industriale and UdR Pisa INSTM , Università di Pisa , Pisa , Italy.
b Department of Materials Science and Engineering , Cornell University , Ithaca, New York , USA.
Biofouling. 2016;32(1):81-93. doi: 10.1080/08927014.2015.1131822.
Block copolymers made from a poly(dimethyl siloxane) (Si) and a poly(meth)acrylate carrying oxyethylene (EG) or fluoroalkyl (AF) side chains were synthesized and incorporated as surface-active components into a silicone matrix to produce cross-linked films with different surface hydrophilicity/phobicity. Near-edge X-ray absorption fine structure (NEXAFS) studies showed that film surfaces containing Si-EG were largely populated by the siloxane, with the oxyethylene chains present only to a minor extent. In contrast, the fluorinated block was selectively segregated to the polymer-air interface in films containing Si-AF as probed by NEXAFS and X-ray photoelectron spectroscopy (XPS) analyses. Such differences in surface composition were reflected in the biological performance of the coatings. While the films with Si-EG showed a higher removal of both Ulva linza sporelings and Balanus amphitrite juveniles than the silicone control, those with Si-AF exhibited excellent antifouling properties, preventing the settlement of cyprids of B. amphitrite.
由聚二甲基硅氧烷（Si）和带有氧乙烯（EG）或氟代烷基（AF）侧链的聚（甲基）丙烯酸酯制成的嵌段共聚物被合成，并作为表面活性组分掺入硅氧烷基质中，以制备具有不同表面亲水性/疏水性的交联膜。近边X射线吸收精细结构（NEXAFS）研究表明，含有Si-EG的膜表面主要由硅氧烷组成，氧乙烯链仅占很小比例。相比之下，通过NEXAFS和X射线光电子能谱（XPS）分析发现，在含有Si-AF的膜中，氟化嵌段选择性地分离到聚合物-空气界面。这种表面组成的差异反映在涂层的生物学性能上。虽然含有Si-EG的膜比硅氧烷对照显示出对石莼幼苗和白脊藤壶幼体的去除率更高，但含有Si-AF的膜表现出优异的防污性能，可防止白脊藤壶无节幼体的附着。
