Laboratory for Chemistry of Novel Materials, Center of Innovation and Research in Materials and Polymers (CIRMAP), Research Institute for Materials Science and Engineering, University of Mons (UMONS) , 20 Place du Parc, 7000 Mons, Belgium.
Langmuir. 2014 Jan 14;30(1):358-68. doi: 10.1021/la403995q. Epub 2013 Dec 20.
The improvement of the (bio)adhesive properties of elastomeric polydimethylsiloxane (PDMS) coatings is reported. This is achieved by a surface modification consisting of the incorporation of block copolymers containing a PDMS block and a poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) block in a PDMS matrix, followed by matrix cross-linking and immersion of the obtained materials in water. Contact angle measurements (CA), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM) showed the presence of the PDMAEMA block at the surface, drastic morphology changes, and improved adhesion properties after immersion in water. Finally, underwater bioadhesion tests show that mussels adhere only to block copolymer-filled coatings and after immersion in water, i.e., when the PDMAEMA blocks have been brought to the coating surface. These observations highlight the significant role of hydrophilic groups in the surface modification of silicone coatings.
报道了弹性聚二甲基硅氧烷（PDMS）涂层（生物）粘附性能的提高。这是通过表面改性实现的，该表面改性包括将含有 PDMS 嵌段和聚（2-（二甲氨基）乙基甲基丙烯酸酯）（PDMAEMA）嵌段的嵌段共聚物掺入 PDMS 基质中，然后进行基质交联，并将得到的材料浸入水中。接触角测量（CA）、X 射线光电子能谱（XPS）和原子力显微镜（AFM）表明，PDMAEMA 嵌段存在于表面，浸入水中后形貌发生剧烈变化，粘附性能得到改善。最后，水下生物粘附测试表明，贻贝仅粘附在填充有嵌段共聚物的涂层上，并且在浸入水中后，即当 PDMAEMA 嵌段被带到涂层表面时。这些观察结果突出了亲水基团在硅酮涂层表面改性中的重要作用。
