Development of durable antimicrobial surfaces containing silver- and zinc-ion–exchanged zeolites

Abstract

The present work involves development of stable antimicrobial materials containing silver-and zinc-ion-exchanged zeolites. Faujasite X and Linde type A zeolites were synthesized, and following ion exchange with Ag + and Zn ++ ions they were found to exhibit antimicrobial effects against bacteria (E. coli, P. aeruginosa, and S. aureus), yeast (C. albicans and C. glabrata), and fungi (A. niger and P. expansum). Zeolites-X and -A containing silver and zinc ions were then mixed with various coating materials, including paints and polypropylene, to develop antimicrobial composites. The long-term antimicrobial characteristics of zeolite-containing composite materials were investigated by inoculating selected microorganisms onto the surface of the materials. The results indicated that the higher the zeolite concentration present in the composite, the more long-term antimicrobial activity was achieved. Silver-ion-exchanged zeolites were more effective against bacterial and candidal species, while zinc zeolites exhibited noticeable antifungal properties. Materials manufactured with metal-ion-exchanged zeolites would prevent microbial growth on surfaces, reducing cross-contamination and infection risk as well as the microbial degradation of products.

Anticorrosive paint with a modified zeolite as functional pigment for SAE 1010 steel protection

“…This structure is characterized by the presence of cavities and intercommunicated channels, usually occupied by water molecules and interchangeable extra-reticular cations (Calabrese, 2018). Its properties of high surface area, elevated cation exchange capacity and acidity justify the wide use of zeolites as adsorbents, catalysts, ion exchange agents, antimicrobials (Al-subaie et al , 2015; Rojas-Pavón et al , 2015; Kozhevnikova and Styazhkina, 2013; Stashkiv et al , 2019; Alshameri et al , 2019; Kustovska, 2018; Iyigundogdu et al , 2014; Kabwadza-Corner et al , 2014) and, in our case, as containers that allow a gradual release of corrosion-inhibiting ions (Ahmed et al , 2011; Dias et al , 2012; Ferrer et al , 2014; Shaw and Tiwari, 2016; Dias et al , 2014; Roselli et al , 2014; Roselli et al , 2018; Abd El-Gawad et al , 2019).…”

Flexible polyurethane foams reinforced with graphene and boron nitride nanofillers

“…Antimicrobial properties of h‐BN filled foams were evaluated using disk diffusion assay described previously. [ 57 ] Antimicrobial fillers and additives are potentially valuable for controlling odor caused by microbial activity, especially for bio‐based foams in hot and humid environments. Antimicrobial activity was assessed against bacteria ( Escherichia coli , Staphylococcus aureus , and Pseudomonas aeruginosa ), yeast ( Candida albicans ), and fungi ( Aspergillus niger ).…”

Sintesis aditif antimikroba Ag/Zn-zeolit dalam bahan pelapis polivinil asetat

“…Antimikroba zeolit yang dimodifikasi dengan perak dapat membunuh, menghambat dan mencegah pertumbuhan mikroba sebelum maupun sesudah kontak dengan permukaan (Irshad et al, 2020) Antimikroba Ag-Zeolit yang sudah dijumpai di pasaran menggunakan zeolit sintetis sebagai matriknya (contoh merk yang dijumpai di marketplace adalah Zeomic©). Hal ini dikarenakan aktivitasnya yang dapat mencapai 14 mm zona hambat dengan pengujian metode cakram (Ustaoǧlu Iyigündoǧdu et al, 2014)).…”