氟碳等离子体聚合层增加了银离子的释放时间和银基涂层的抗菌活性

Nanomaterials Pub Date : 2024-03-29 DOI:10.3390/nano14070609
Linda Bonilla-Gameros, P. Chevallier, Xavier Delvaux, L. A. Yáñez-Hernández, Laurent Houssiau, Xavier Minne, Vanessa P. Houde, A. Sarkissian, Diego Mantovani
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引用次数: 0

摘要

银基抗菌涂层可限制医院感染的传播。事实上,以无定形氢化碳(a-C:H)为基质,使用银和氧化银纳米粒子(Ag 和 AgO NPs)来减少环境表面的微生物污染是一种很有前景的方法。然而,其作为抗菌涂层的成功取决于对 Ag+ 释放的控制。从这个意义上说,如果需要持续释放,就需要额外的屏障来延长 Ag+ 的释放时间。因此,本研究探讨了使用等离子含氟聚合物(CFx)作为附加面层,以延长 Ag+ 的释放时间,并利用其高度疏水性提高抗菌活性。在这里,利用脉冲余辉低压等离子聚合法在含有Ag和AgO NPs的a-C:H上沉积了多孔CFx薄膜。对其化学成分、表面润湿性和形态、释放曲线和抗菌活性进行了分析。总体而言,a-C:H:Ag(含 12.1% 的 Ag)和 CFx 薄膜(120.0°,F/C = 0.8)的组合成功灭活了 88% 的大肠杆菌,并在 12 小时后延缓了生物膜的形成。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fluorocarbon Plasma-Polymerized Layer Increases the Release Time of Silver Ions and the Antibacterial Activity of Silver-Based Coatings
Silver-based antibacterial coatings limit the spread of hospital-acquired infections. Indeed, the use of silver and silver oxide nanoparticles (Ag and AgO NPs) incorporated in amorphous hydrogenated carbon (a-C:H) as a matrix demonstrates a promising approach to reduce microbial contamination on environmental surfaces. However, its success as an antibacterial coating hinges on the control of Ag+ release. In this sense, if a continuous release is required, an additional barrier is needed to extend the release time of Ag+. Thus, this research investigated the use of a plasma fluoropolymer (CFx) as an additional top layer to elongate Ag+ release and increase the antibacterial activity due to its high hydrophobic nature. Herein, a porous CFx film was deposited on a-C:H containing Ag and AgO NPs using pulsed afterglow low pressure plasma polymerization. The chemical composition, surface wettability and morphology, release profile, and antibacterial activity were analyzed. Overall, the combination of a-C:H:Ag (12.1 at. % of Ag) and CFx film (120.0°, F/C = 0.8) successfully inactivated 88% of E. coli and delayed biofilm formation after 12 h. Thus, using a hybrid approach composed of Ag NPs and a hydrophobic polymeric layer, it was possible to increase the overall antibacterial activity of the coating.
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