Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, New York 14260-3000, USA.
Biofouling. 2012;28(2):143-57. doi: 10.1080/08927014.2012.659244.
Four-component xerogel films consisting of 1 mole-% n-octadecyltrimethoxysilane (C18) and 50 mole-% tetraethoxysilane (TEOS) in combination with 1-24 mole-% tridecafluoro-1,1,2,2-tetrahydrooctyltriethoxysilane (TDF) and 25-48 mole-% n-octyltriethoxysilane (C8) and a 1:49:50 mole-% C18/TDF/TEOS were prepared. Settlement of barnacle cyprids and removal of juvenile barnacles, settlement of zoospores of the alga Ulva linza, and strength of attachment of 7-day sporelings (young plants) of Ulva were compared amongst the xerogel formulations. Several of the xerogel formulations were comparable to poly(dimethylsiloxane) elastomer with respect to removal of juvenile barnacles and removal of sporeling biomass. The 1:4:45:50 and 1:14:35:50 C18/TDF/C8/TEOS xerogels displayed some phase segregation by atomic force microscopy (AFM) pre- and post-immersion in water. Imaging reflectance infrared microscopy showed the formation of islands of alkane-rich and perfluoroalkane-rich regions in these same xerogels both pre- and post-immersion in water. Surface energies were unchanged upon immersion in water for 48 h amongst the TDF-containing xerogel coatings. AFM measurements demonstrated that surface roughness on the 1:4:45:50 and 1:14:35:50 C18/TDF/C8/TEOS xerogel coatings decreased upon immersion in water.
由 1 摩尔%正十八烷基三甲氧基硅烷（C18）和 50 摩尔%四乙氧基硅烷（TEOS）与 1-24 摩尔%十三氟-1,1,2,2-四氢辛基三乙氧基硅烷（TDF）和 25-48 摩尔%正辛基三乙氧基硅烷（C8）和 1:49:50 摩尔% C18/TDF/TEOS 组成的四组分气凝胶薄膜。比较了气凝胶配方中藤壶幼体的沉降和幼体藤壶的去除、绿藻浒苔游动孢子的附着和浒苔 7 天孢子苗（幼苗）的附着强度。几种气凝胶配方在去除幼体藤壶和去除孢子苗生物量方面与聚二甲基硅氧烷弹性体相当。1:4:45:50 和 1:14:35:50 C18/TDF/C8/TEOS 气凝胶在浸入水中前后通过原子力显微镜（AFM）显示出一些相分离。成像反射红外显微镜显示，在这些相同的气凝胶中，烷烃富区和全氟烷烃富区形成了岛屿，无论是在浸入水之前还是之后。在含有 TDF 的气凝胶涂层中，浸入水 48 小时后表面能没有变化。AFM 测量表明，1:4:45:50 和 1:14:35:50 C18/TDF/C8/TEOS 气凝胶涂层的表面粗糙度在浸入水后降低。
