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Abstract：
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 P12 (12 g of PTS in 100 g of PDMS) showed the most effective antifouling performance.
摘要：
通过自由基聚合将硫脲和醚基引入MQ硅树脂聚合物中，合成了聚醚-硫脲-硅氧烷(PTS)共聚物。合成共聚物的表征表明发生了H键相互作用和窄分子量多分散指数。通过掺入合成的共聚物和苯基甲基硅油（PSO）来生产防污涂料。添加微量的共聚物通过增加涂层的表面粗糙度来增强涂层的疏水性。然而,共聚物的过量添加导致涂层表面光滑度的显著劣化。共聚物改善了涂层的机械性能，但过量添加降低了交联密度,削弱了力学性能。随着共聚物添加量的增加,由于共聚物引起的PSO在涂层中的存储形式的变化，PSO的浸出得到了显着改善。基于共聚物的H-键合相互作用，涂层与基材之间的粘合强度显著提高。然而,共聚物的过量添加并不能无限提高粘合强度。防污性能表明，适量的共聚物可以获得足够的PSO浸出效率，从而有效提高涂料的防污性能。在这项研究中,制备的涂层P12(在100克PDMS中12克PTS)显示出最有效的防污性能。
