Chemistrynpj Materials Degradation

Comparative study of the structure and durability of commercial silicate glasses for food consumption and cosmetic packaging

L. Brunswic, F. Angeli, et al.

This groundbreaking research explores how four different commercial silicate glasses alter under acidic conditions over three years. Through advanced analyses, it was discovered that glass composition significantly affects alteration rates and element depletion. The research was conducted by Léa Brunswic, Frédéric Angeli, Thibault Charpentier, Stéphane Gin, Pierre Asplanato, Huseyin Kaya, and Seong H. Kim.... show more

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Abstract

Four commercial glass compositions were investigated to understand their mechanisms of alteration in light of current and future regulations on food contact materials. Lead crystal (fine glassware), soda-lime (food and cosmetic containers), borosilicate (cookware) and barium glass (tableware) powders and slabs were altered for 3 years in 4% (v/v) acetic acid at pH 2.4 and 70 °C. The leaching solution was analyzed by ICP-AES while glass slabs were investigated by ToF-SIMS and Spectroscopic Ellipsometry. In acidic medium, the polymerization of the silicate network and glass composition impacted alteration rates and depleted depths of alkalis and alkaline-earth elements. Yet the rate of hydrolysis measured from Si release remained similar under identical conditions, regardless of glass structure and composition. For lead crystal glass, repolymerization of the silicate network was observed during alteration.

Publisher

npj Materials Degradation

Published On

Aug 17, 2024

Authors

Léa Brunswic, Frédéric Angeli, Thibault Charpentier, Stéphane Gin, Pierre Asplanato, Huseyin Kaya, Seong H. Kim

DOI

https://doi.org/10.1038/s41529-024-00502-5

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