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首页> 外文期刊>Advanced Functional Materials >A Coating that Combines Lotus-Effect and Con tact-Active Antimicrobial Properties on Silicone
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A Coating that Combines Lotus-Effect and Con tact-Active Antimicrobial Properties on Silicone

机译：有机硅结合了莲花效应和接触活性抗菌特性的涂料

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摘要

The antimicrobial equipment of materials is of great importance in medicine but also in daily life. A challenge is the antimicrobial modification of hydrophobic surfaces without increasing their low surface energy. This is particularly important for silicone-based materials. Because most antimicrobial surface modifications render the materials more hydrophilic, methods are needed to achieve antimicrobial activity without changing the high water-contact-angle. This is achieved in the present work, where SiO2 nanoparticles are prepared and functionalized with 3-(trimethoxysilyl)-propyldimethyloctadecyl ammonium chloride (QAS) in a one-pot synthesis. The modified nanoparticles are applied onto a silicone surface from suspension with no need of elaborate pretreatment. The resulting surface exhibits a Lotus-Effect combined with contact-active antimicrobial properties. The particle surfaces show self-organizing micro- and nanostructures that afford a water-contact angle of 144 degrees and a hysteresis below 10 degrees. The particles are self-adhering on the silicone after solvent evaporation and resistant against immersion into and washing with water for at least 5 d. Thereby, the adhesion of the bacterial strain Staphylococcus aureus to these surfaces is reduced and the remaining bacterial cells are killed within 16 h. This is the first example of a Lotus-Effect surface with intrinsic contact-active antimicrobial properties.
机译：材料的抗菌设备不仅在医学上而且在日常生活中都非常重要。一个挑战是疏水表面的抗微生物改性，而又不增加其低表面能。这对于有机硅基材料尤其重要。由于大多数抗菌表面改性使材料具有更大的亲水性，因此需要在不改变高水接触角的情况下实现抗菌活性的方法。这是在目前的工作中实现的，在此工作中，一锅合成中制备了SiO2纳米颗粒并用3-（三甲氧基甲硅烷基）-丙基二甲基十八烷基氯化铵（QAS）进行了功能化。将改性的纳米颗粒从悬浮液施用于有机硅表面，无需进行精细的预处理。所得表面显示出莲花效应和接触活性抗菌特性。颗粒表面显示出自组织的微结构和纳米结构，可提供144度的水接触角和10度以下的磁滞。溶剂蒸发后，颗粒会自粘在硅酮上，并能浸入水中至少5 d并耐水洗。由此，减少了细菌菌株金黄色葡萄球菌对这些表面的粘附，并且在16小时内杀死了剩余的细菌细胞。这是具有内在接触活性抗菌特性的荷叶效果表面的第一个示例。

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