Are Ni-SiC Nanoparticle Electroplated Coatings a Safer Alternative to Hard Chromium? A Comprehensive Aging, Toxicity, and In Silico Studies to Assess Safety by Design
Swaroop Chakraborty, Nathan Langford, Yvonne Kohl, Dimitra-Danai Varsou, Sascha Wien, William Stokes, Evangelos Papaioannou, Kata Berkesi, Andrew Britton, Bashiru Ibrahim, Antreas Afantitis, Alexandros Zoikis Karathanasis, Laurence Andrew Nelson, Eugenia Valsami-Jones
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引用次数: 0
Abstract
Considering the increasing interest in utilising nanoparticles (NPs) for advanced, safe, and sustainable coatings, this paper addresses the toxicological concerns associated with Nickel-Silicon Carbide (Ni-SiC) electroplated nanocomposite coatings as an alternative to conventional chromium electrodeposition. We present Ni-SiC nanocomposite coatings as potential substitutes and conduct a comprehensive investigation into the impact of impregnated SiC particles on coating properties. Specifically, we examined the aging of Ni-watt type and Ni Watt-SiC nanocomposite coatings in various environmental and biological media. Our release and transformation data indicate an enhanced release and transformation of Ni in the simulated media (e.g., up to 200 μg/mL in cell culture media) and the formation of NiO and Ni (OH)₂ species as confirmed by XPS analysis. Transmission electron microscopy data reveals the release of SiC NPs in the respective simulated aging medium. The Ni ion release from Ni-watt type and Ni-SiC nanocomposite coating was also investigated in silico to support safe-by-design (SbD) approaches in the development of nanoalloys for electroplating. An invitro cytotoxicity assay, according to ISO shows a significant reduction in cell viability for Ni-SiC nanocomposite coated samples (up to 80% after 72 hours) compared to standalone Ni-Watt type electroplated coatings (up to 20% after 72 hours). Our findings suggest that the co-deposition of Ni with SiC NPs enhances Ni release, which is a major factor in causing toxicity. These results could be pivotal in the adoption of Safe and Sustainable by Design principles within the electroplating industry. This paper contributes to the fields of nanotoxicology and surface coatings, providing a foundation for designing and optimising environmentally friendly, high-performance coatings with broad industrial applications
期刊介绍:
Environmental Science: Nano serves as a comprehensive and high-impact peer-reviewed source of information on the design and demonstration of engineered nanomaterials for environment-based applications. It also covers the interactions between engineered, natural, and incidental nanomaterials with biological and environmental systems. This scope includes, but is not limited to, the following topic areas:
Novel nanomaterial-based applications for water, air, soil, food, and energy sustainability
Nanomaterial interactions with biological systems and nanotoxicology
Environmental fate, reactivity, and transformations of nanoscale materials
Nanoscale processes in the environment
Sustainable nanotechnology including rational nanomaterial design, life cycle assessment, risk/benefit analysis