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Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes

The present COVID-19 emergency has dramatically increased the demand for pharmaceutical containers, especially vials. End-of-life containers, however, cannot be easily recycled in the manufacturing of new articles. This paper presents some strategies for upcycling of pharmaceutical glass into variou...

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Autores principales: Mehta, Akansha, Karbouche, Khaoula, Kraxner, Jozef, Elsayed, Hamada, Galusek, Dušan, Bernardo, Enrico
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9181467/
https://www.ncbi.nlm.nih.gov/pubmed/35683083
http://dx.doi.org/10.3390/ma15113784
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author Mehta, Akansha
Karbouche, Khaoula
Kraxner, Jozef
Elsayed, Hamada
Galusek, Dušan
Bernardo, Enrico
author_facet Mehta, Akansha
Karbouche, Khaoula
Kraxner, Jozef
Elsayed, Hamada
Galusek, Dušan
Bernardo, Enrico
author_sort Mehta, Akansha
collection PubMed
description The present COVID-19 emergency has dramatically increased the demand for pharmaceutical containers, especially vials. End-of-life containers, however, cannot be easily recycled in the manufacturing of new articles. This paper presents some strategies for upcycling of pharmaceutical glass into various porous ceramics. Suspensions of a fine glass powder (70 vol%) are used as a starting material. Highly uniform cellular structures may be easily prepared by vigorous mechanical stirring of partially gelified suspensions with added surfactant, followed by drying and firing at 550–650 °C. Stabilization of the cellular structures at temperatures as low as the glass transition temperature (T(g)) of the used glass is facilitated by thermal decomposition of the gel phase, instead of viscous flow sintering of glass. This finding enabled the preparation of glass membranes (∼78 vol% open porosity), by direct firing of hardened suspensions, avoiding any surfactant addition and mechanical stirring. The powders obtained by crushing of hardened suspensions, even in unfired state, may be used as a low-cost sorbent for dye removal.
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spelling pubmed-91814672022-06-10 Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes Mehta, Akansha Karbouche, Khaoula Kraxner, Jozef Elsayed, Hamada Galusek, Dušan Bernardo, Enrico Materials (Basel) Article The present COVID-19 emergency has dramatically increased the demand for pharmaceutical containers, especially vials. End-of-life containers, however, cannot be easily recycled in the manufacturing of new articles. This paper presents some strategies for upcycling of pharmaceutical glass into various porous ceramics. Suspensions of a fine glass powder (70 vol%) are used as a starting material. Highly uniform cellular structures may be easily prepared by vigorous mechanical stirring of partially gelified suspensions with added surfactant, followed by drying and firing at 550–650 °C. Stabilization of the cellular structures at temperatures as low as the glass transition temperature (T(g)) of the used glass is facilitated by thermal decomposition of the gel phase, instead of viscous flow sintering of glass. This finding enabled the preparation of glass membranes (∼78 vol% open porosity), by direct firing of hardened suspensions, avoiding any surfactant addition and mechanical stirring. The powders obtained by crushing of hardened suspensions, even in unfired state, may be used as a low-cost sorbent for dye removal. MDPI 2022-05-25 /pmc/articles/PMC9181467/ /pubmed/35683083 http://dx.doi.org/10.3390/ma15113784 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mehta, Akansha
Karbouche, Khaoula
Kraxner, Jozef
Elsayed, Hamada
Galusek, Dušan
Bernardo, Enrico
Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes
title Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes
title_full Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes
title_fullStr Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes
title_full_unstemmed Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes
title_short Upcycling of Pharmaceutical Glass into Highly Porous Ceramics: From Foams to Membranes
title_sort upcycling of pharmaceutical glass into highly porous ceramics: from foams to membranes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9181467/
https://www.ncbi.nlm.nih.gov/pubmed/35683083
http://dx.doi.org/10.3390/ma15113784
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