无污染水浴电沉积钢表面纳米晶银涂层及其抗菌性能

IF 5.5 3区 工程技术 Q1 ENGINEERING, CHEMICAL
Manal A. El Sayed , Nahla T. Elazab , Malek Gassoumi , Magdy A.M. Ibrahim
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引用次数: 0

摘要

微生物涂层是一种有助于抑制细菌传播的方法。尽管对各种配方的抗菌涂层进行了大量研究,但银基涂层似乎是最有效的。电沉积是一种极具发展前景的纳米晶银涂层技术,除具有抗菌特性外,在微电子、航空航天、汽车、生物技术、纳米生物技术、生物工程等领域有着广泛的应用。令人遗憾的是,工业上常用的用于银镀层的氰化物电解质是最危险的物质之一,对健康和环境造成严重危害。寻找高环保电解质替代氰化物电解质是十分重要的。方法采用恒流沉积法在不锈钢表面制备纳米晶银涂层。电化学测量采用线性扫描伏安法(LCV)和循环伏安法(CV)进行。采用高场发射扫描电镜(FESEM)和x射线衍射分析(XRD)对制备的银镀层进行了表征。在无氰液中,通过直接恒流电沉积在SS表面合成了光亮的纳米晶Ag涂层(纳米尺寸在14.8 ~ 67.6 nm之间)。这种环保、无氰化物的镀液具有高稳定性、低成本和高阴极电流效率的特点。形貌与电解液组成和运行环境密切相关。根据所施加的电流密度,从该镀液中沉积的银的显微硬度具有相对较高的值(120.2-158.7 kg f mm-2)。此外,这些浴液形成的纳米晶银涂层对革兰氏阳性和革兰氏阴性细菌,特别是李斯特菌和链球菌,是极好的抗菌剂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Nanocrystalline silver coatings on steel by electrodeposition from non-polluting aqueous baths and its antibacterial activity

Nanocrystalline silver coatings on steel by electrodeposition from non-polluting aqueous baths and its antibacterial activity

Background

Antimicrobial coatings are one way that could help inhibit the spread of germs. Despite significant research into a variety of antimicrobial coatings with varied formulas, silver-based coatings appear to be the most effective. Electrodeposition is a promising technology to synthesize nanocrystalline silver coatings which have a wide range of applications such as in microelectronics, aerospace, automotive, biotechnology, nanobiotechnology, bioengineering sciences, in addition to its antimicrobial characteristics. Regrettably, cyanide electrolyte which is commonly applied in industry for silver coatings is one of the most hazardous substances, raising serious health and environmental hazards. It is important that seek high environmentally friendly electrolytes alternative to cyanide electrolytes.

Methods

The nanocrystalline silver coatings were successfully synthesized via galvanostatic deposition on stainless steel surface from an environmentally friendly novel bath. The electrochemical measurements were made utilizing linear sweep voltammetry (LCV), and cyclic voltammetry (CV). A high field emission scanning electron microscope (FESEM) and X-ray diffraction analysis (XRD) were used to characterize the obtained silver coatings.

Significant findings

Bright and adherent nanocrystalline Ag coatings (nano-size ranging between 14.8 and 67.6 nm) were synthesized by direct galvanostatic electrodeposition on SS surface from a bath free from cyanide. This environmentally friendly, cyanide-free bath is characterized by its high stability, low cost, and high cathodic current efficiency. The morphology was strongly dependent on the electrolyte composition as well as on the run circumstances. The microhardness of Ag deposited from this bath has a relatively high value (120.2–158.7 kg f mm-2) depending on the applied current density. Furthermore, the nanocrystalline silver coatings formed by these baths are excellent antibacterial agents versus a vast spectrum of gram-positive and gram-negative bacteria, particularly Listeria and Streptococcus bacteria.

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来源期刊
CiteScore
9.10
自引率
14.00%
发文量
362
审稿时长
35 days
期刊介绍: Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.
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