Silver Nanoparticle/Graphene Oxide/Chitosan Coatings for Protection of Surfaces in Food Processing
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Silver Nanoparticle/Graphene Oxide/Chitosan Coatings for Protection of Surfaces in Food Processing Amany M. Fekry1 · Rasha A. Ahmed2 · Sabreen A. Bioumy3 Received: 18 November 2019 / Revised: 10 July 2020 / Accepted: 5 August 2020 © Springer Nature Switzerland AG 2020
Abstract Graphene oxide (GO) is mixed with silver nanoparticles (AgNPs) in chitosan (CS) solution to form a novel interesting nano-composite that is safe for food. The hardness, thickness, specular gloss, morphology, and elemental composition of AgNPs/GO/CS nano-composite have been considered. Scanning Electron Microscopy (SEM) image of AgNPs/GO/CS nano-composite displays a uniform well-formed film with thickness of 155 µm and microhardness of 495 HV. The effect of AgNPs/GO/CS nano-composite on the corrosion behavior of ceramics was also considered by different electrochemical tests. The influences of pH, temperature, and surface modification on the corrosion protection of ceramic alloy were tested in a constant composition of universal buffer. Polarization curves verified that AgNPs/GO/CS nano-composite acted as a mixed-type coating with a protection efficiency (PE) of 99.0%. Moreover, the temperature and the pH values were found to significantly affect the corrosion behavior of the ceramic alloy. This work displays well a new industrial application approach for modifying commercial ceramic utensils with a cost-effective coating to be used safely for food. Keywords Graphene oxide · Ag nanoparticle · Chitosan · Ceramics · Utensils
1 Introduction Ceramics are superior materials owing to their high melting points, and low electrical and thermal conductivity values. They are utilized extensively in utensils [1]; its composition is shown in Scheme 1. Mica [2] is a group of hydrous potassium and aluminum silicate minerals (phyllosilicate form, displaying a two-dimensional sheet or layer structure). Corrosion was accompanied mostly with metals and ceramic materials. Only a minor extent of metal species released from ceramics by corrosion [3]. To overcome this Electronic supplementary material The online version of this article (https://doi.org/10.1007/s40735-020-00402-6) contains supplementary material, which is available to authorized users. * Amany M. Fekry [email protected] 1
Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
2
Forensic Chemistry Laboratories, Medico Legal Department, Ministry of Justice, Cairo, Egypt
3
Chemical Testing Laboratories, Egyptian Organization for Standardization & Quality (EOS), Cairo, Egypt
problem, efficient coatings have to be synthesized on ceramics surface as an anticorrosive, high mechanical resistance, and high-durability coatings [4]. Graphene [5] has been well known as one of the most promising 2D nanomaterials; owing to its exceptional properties such as the optical, electronic, mechanical, physico-chemical, and thermal properties. Graphene oxide (GO) [6, 7] is the oxidized form of graphene with unique properties such as high mechanical strength. GO contains var
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