Gudipati Chakravarthy S, Finlay John A, Callow James A, Callow Maureen E, Wooley Karen L
Centre for Materials Innovation and Department of Chemistry, Washington University, One Brookings Drive, Saint Louis, Missouri 63130-4899, USA.
Langmuir. 2005 Mar 29;21(7):3044-53. doi: 10.1021/la048015o.
Cross-linked hyperbranched fluoropolymer (HBFP) and poly(ethylene glycol) (PEG) amphiphilic networks with PEG weight percentages of 14% (HBFP-PEG14), 29% (HBFP-PEG29), 45% (HBFP-PEG45), and 55% (HBFP-PEG55) were prepared on 3-aminopropyl)triethoxysilane (3-APS) functionalized microscope glass slides for marine antifouling and fouling-release applications. The surface-free energies (gamma(s)), polar (gamma(s)(p) and gamma(s)(AB)), and dispersion (gamma(s)(d) and gamma(s)(LW)) components were evaluated using advancing contact angles by two-liquid geometric-mean and three-liquid Lifshitz-van der Waals acid-base approaches. The HBFP coating exhibited a low surface energy of 22 mJ/m(2), while the gamma(s) and gamma(s)(p) of the cross-linked HBFP-PEG coatings increased proportionally with the PEG weight percentages in the networks. The adsorption of bovine serum albumin (BSA), lectin from Codium fragile (CFL), lipopolysaccharides from Escherichia coli (LPSE) and Salmonella minnesota (LPSS) upon glass, APS-glass, HBFP, PEG, and the cross-linked HBFP-PEG network coatings were investigated by fluorescence microscopy. The marine antifouling and fouling-release properties of the cross-linked HBFP-PEG coatings were evaluated by settlement and release assays involving zoospores of green fouling alga Ulva (syn. Enteromorpha; Hayden, H. S.; Blomster, J.; Maggs, C. A.; Silva, P. C.; Stanhope, M. J.; Waaland, J. R. Eur. J. Phycol. 2003, 38, 277). The growth and release of Ulva sporelings were also investigated upon the HBFP-PEG45 coating in comparison to a poly(dimethylsiloxane) elastomer (PDMSE) standard material. Of the heterogeneous cross-linked network coatings, the maximum resistances to protein, lipopolysaccharide, and Ulva zoospore adhesion, as well as the best zoospore and sporeling release properties, were recorded for the HBFP-PEG45 coating. This material also exhibited better performance than did a standard PDMSE coating, suggesting its unique applicability in fouling-resistance applications.
在3-氨丙基）三乙氧基硅烷（3-APS）功能化的显微镜载玻片上制备了聚乙二醇（PEG）重量百分比分别为14%（HBFP-PEG14）、29%（HBFP-PEG29）、45%（HBFP-PEG45）和55%（HBFP-PEG55）的交联超支化含氟聚合物（HBFP）与聚乙二醇（PEG）两亲网络，用于海洋防污和防污释放应用。采用双液几何平均法和三液Lifshitz-van der Waals酸碱法，通过前进接触角评估表面自由能（γ(s)）、极性（γ(s)(p)和γ(s)(AB)）以及色散（γ(s)(d)和γ(s)(LW)）分量。HBFP涂层的表面能较低，为22 mJ/m²，而交联的HBFP-PEG涂层的γ(s)和γ(s)(p)随网络中PEG重量百分比的增加而成比例增加。通过荧光显微镜研究了牛血清白蛋白（BSA）、脆弱刚毛藻凝集素（CFL）、大肠杆菌脂多糖（LPSE）和明尼苏达沙门氏菌脂多糖（LPSS）在玻璃、APS-玻璃、HBFP、PEG以及交联的HBFP-PEG网络涂层上的吸附情况。通过涉及绿色污损藻类石莼游动孢子的附着和释放试验，评估了交联的HBFP-PEG涂层的海洋防污和防污释放性能。与聚二甲基硅氧烷弹性体（PDMSE）标准材料相比，还研究了石莼幼苗在HBFP-PEG45涂层上的生长和释放情况。在非均相交联网络涂层中，HBFP-PEG45涂层对蛋白质、脂多糖和石莼游动孢子的附着力具有最大抗性，同时具有最佳的游动孢子和幼苗释放性能。这种材料的性能也优于标准的PDMSE涂层，表明其在抗污应用中具有独特的适用性。
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