One of the challenges of using Stainless Steel 316L (SS316L) as an implant substrate is poor adhesion of organic/inorganic coatings on their surface. Poor adhesion of the provided coating may lead to serious problems like blockage of arteries in cardiovascular stents. In this study, the (3-aminopropyl) triethoxysilane effect as an adhesion promoter between the organic/inorganic polyhedral oligomeric silsesquioxane - poly(carbonate-urea) Urethane (POSS-PCU) coating and substrate was investigated. The objective was to study the significant parameters, including the surface preparation method, pH of the silane layer, and the curing process on adhesion of the coating on the SS316L.

Contact angle measurements indicated that the higher surface free energy values attributed to the pretreated silane layer did not result in better adhesion strength of POSS-PCU coating. Scanning Electron Microscope/Energy Dispersive Using X-Ray and Atomic Force Microscopy results revealed that more uniformity was obtained in silane layers prepared at pH= 4 (acidic solution) compared to higher pH values. The ellipsometry results showed that the acidic silane solution, which was cured at high temperature, had a lower thickness than other primer layers. Lap-shear strength results confirmed a noticeable increase in the adhesion strength of POSS-PCU coating on the SS316L substrate in the presence of the silane layer in dry and wet conditions.

使用不锈钢 316L (SS316L) 作为植入物基材的挑战之一是其表面有机/无机涂层的附着力差。所提供涂层的不良粘附可能导致严重问题，例如心血管支架中的动脉阻塞。在这项研究中，研究了（3-氨基丙基）三乙氧基硅烷作为有机/无机多面体低聚倍半硅氧烷-聚（碳酸酯-脲）聚氨酯（POSS-PCU）涂层和基材之间的粘合促进剂。目的是研究重要参数，包括表面制备方法、硅烷层的 pH 值和固化过程对 SS316L 涂层附着力的影响。

接触角测量表明，归因于预处理的硅烷层的较高表面自由能值不会导致 POSS-PCU 涂层的更好粘合强度。使用 X 射线和原子力显微镜的扫描电子显微镜/能量色散结果表明，与较高的 pH 值相比，在 pH=4（酸性溶液）下制备的硅烷层获得了更高的均匀性。椭圆光度法结果表明，高温固化的酸性硅烷溶液的厚度低于其他底漆层。搭接剪切强度结果证实，在干燥和潮湿条件下，在硅烷层存在的情况下，POSS-PCU 涂层在 SS316L 基材上的粘附强度显着增加。