Department of Material Science and Engineering, Changshu Institute of Technology, Changshu 215500, China.
Molecules. 2023 Apr 19;28(8):3574. doi: 10.3390/molecules28083574.
By introducing thiourea and ether groups into MQ silicone resin polymer via free radical polymerization, a polyether-thiourea-siloxane (PTS) copolymer was synthesized. The characterization of the synthesized copolymer indicated the occurrence of H-bonding interactions and a narrow molecular weight polydispersity index. Antifouling coatings were produced by incorporating the synthesized copolymer and phenylmethylsilicone oil (PSO). The addition of a minute amount of copolymer enhanced the hydrophobicity of the coating by increasing its surface roughness. However, excessive addition of copolymer resulted in a significant deterioration of the coating surface smoothness. The copolymer improved the mechanical properties of the coating, but excessive addition decreased the crosslinking density and weakened the mechanical performance. With increasing copolymer addition, the leaching of PSO was significantly improved due to the change in the storage form of PSO in the coating caused by the copolymer. Based on the H-bonding interaction of the copolymer, the adhesion strength between the coating and the substrate was significantly improved. However, excessive addition of copolymer did not infinitely enhance the adhesion strength. The antifouling performance demonstrated that an appropriate amount of copolymer could obtain adequate PSO leaching efficiency, thereby effectively enhancing the antifouling performance of the coating. In this study, the prepared coating P (12 g of PTS in 100 g of PDMS) showed the most effective antifouling performance.
通过自由基聚合在 MQ 硅树脂聚合物中引入硫脲和醚基团，合成了一种聚醚-硫脲-硅氧烷（PTS）共聚物。合成共聚物的表征表明存在氢键相互作用和较窄的分子量多分散指数。通过加入合成的共聚物和苯基甲基硅油（PSO）制备了防污涂料。共聚物的加入量很少，通过增加表面粗糙度来提高涂层的疏水性。然而，过量添加共聚物会显著降低涂层表面的光滑度。共聚物改善了涂层的机械性能，但过量添加会降低交联密度并削弱机械性能。随着共聚物添加量的增加，由于共聚物改变了涂层中 PSO 的储存形式，PSO 的浸出得到了显著改善。基于共聚物的氢键相互作用，涂层与基底之间的粘附强度显著提高。然而，过量添加共聚物并不能无限提高粘附强度。防污性能表明，适量的共聚物可以获得足够的 PSO 浸出效率，从而有效提高涂层的防污性能。在这项研究中，制备的涂层 P（100gPDMS 中 12gPTS）表现出最有效的防污性能。
