The Stability of Chlorite Ion in Electrospun Poly(Vinyl Alcohol) Fibers: pH-Responsive Chlorine Dioxide Release

Kiss, Eszter and Vecsei, Gergő and Cserháti, Csaba and Fábián, István and Szabó, Mária (2026) The Stability of Chlorite Ion in Electrospun Poly(Vinyl Alcohol) Fibers: pH-Responsive Chlorine Dioxide Release. ACS OMEGA. ISSN 2470-1343

Preview

Text the-stability-of-chlorite-ion-in-electrospun-polyvinyl-alcohol-fibers-ph-responsive-chlorine-dioxide-release.pdf Download (4MB) | Preview

Abstract

Poly(vinyl alcohol) (PVA)-based electrospun fiber mats containing sodium chlorite were prepared and characterized to explore their structural properties and chemical behavior relevant to potential self-disinfecting wound dressing applications. Scanning electron microscopy (SEM) revealed that the diameter and uniformity of the fibers are influenced by both the chlorite ion concentration and the pH of the spinning solution. Elemental mapping and ion chromatography confirmed the homogeneous distribution of chlorite ions within the mats. The decomposition of the chlorite ion was found to be pH-dependent, with enhanced stability at alkaline pH and lower chlorite concentrations. At acidic pH, chlorite rapidly decomposes, primarily forming chlorine dioxide, which is a desirable disinfectant. Higher chlorite ion concentrations favor the formation of an unwanted chlorate ion. Gas chromatography confirmed the evolution of ClO2 over extended time, and 1 H NMR analysis verified that side reactions with the PVA matrix contribute to chlorite ion depletion. The system’s response to skin-like pH conditions demonstrated relatively fast ClO2 release, underlining the importance of local environmental factors. Overall, low chlorite ion concentrations and a slightly basic pH are required to produce stable mats. The functional electrospun PVA mats presented here are promising candidates for controlled antimicrobial release of ClO2 in biomedical applications.

Actions (login required)

Edit Item