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The Effects of Monomer, Crosslinking Agent, and Filler Concentrations on the Viscoelastic and Swelling Properties of Poly(methacrylic acid) Hydrogels: A Comparison

The present work aims at comparatively studying the effects of the concentrations of a monomer (10–30 wt% based on the whole hydrogel composition), crosslinking agent (1–3 mol% based on the monomer), and reinforcing agent (montmorillonite-MMT, 1–3 wt.% based on the whole hydrogel composition) on the...

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Autores principales: Ninciuleanu, Claudia Mihaela, Ianchiş, Raluca, Alexandrescu, Elvira, Mihăescu, Cătălin Ionuţ, Scomoroşcenco, Cristina, Nistor, Cristina Lavinia, Preda, Silviu, Petcu, Cristian, Teodorescu, Mircea
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8124361/
https://www.ncbi.nlm.nih.gov/pubmed/33946776
http://dx.doi.org/10.3390/ma14092305
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author Ninciuleanu, Claudia Mihaela
Ianchiş, Raluca
Alexandrescu, Elvira
Mihăescu, Cătălin Ionuţ
Scomoroşcenco, Cristina
Nistor, Cristina Lavinia
Preda, Silviu
Petcu, Cristian
Teodorescu, Mircea
author_facet Ninciuleanu, Claudia Mihaela
Ianchiş, Raluca
Alexandrescu, Elvira
Mihăescu, Cătălin Ionuţ
Scomoroşcenco, Cristina
Nistor, Cristina Lavinia
Preda, Silviu
Petcu, Cristian
Teodorescu, Mircea
author_sort Ninciuleanu, Claudia Mihaela
collection PubMed
description The present work aims at comparatively studying the effects of the concentrations of a monomer (10–30 wt% based on the whole hydrogel composition), crosslinking agent (1–3 mol% based on the monomer), and reinforcing agent (montmorillonite-MMT, 1–3 wt.% based on the whole hydrogel composition) on the swelling and viscoelastic properties of the crosslinked hydrogels prepared from methacrylic acid (MAA) and N,N′-methylenebisacrylamide (BIS) in the presence of K(2)S(2)O(8) in aqueous solution. The viscoelastic measurements, carried out on the as-prepared hydrogels, showed that the monomer concentration had the largest impact, its three-time enhancement causing a 30-fold increase in the storage modulus, as compared with only a fivefold increase in the case of the crosslinking agent and 1.5-fold increase for MMT in response to a similar threefold concentration increase. Swelling studies, performed at three pH values, revealed that the water absorption of the hydrogels decreased with increasing concentration of both the monomer and crosslinking agent, with the amplitude of the effect of concentration modification being similar at pH 5.4 and 7.4 in both cases, but very different at pH 1.2. Further, it was shown that the increased pH differently influenced the swelling degree in the case of the hydrogel series in which the concentrations of the monomer and crosslinking agent were varied. In contrast to the effect of the monomer and crosslinking agent concentrations, the increase in the MMT amount in the hydrogel resulted in an increased swelling degree at pH 5.4 and 7.4, while at pH 1.2, a slight decrease in the water absorption was noticed. The hydrogel crosslinking density determinations revealed that this parameter was most affected by the increase in the monomer concentration.
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spelling pubmed-81243612021-05-17 The Effects of Monomer, Crosslinking Agent, and Filler Concentrations on the Viscoelastic and Swelling Properties of Poly(methacrylic acid) Hydrogels: A Comparison Ninciuleanu, Claudia Mihaela Ianchiş, Raluca Alexandrescu, Elvira Mihăescu, Cătălin Ionuţ Scomoroşcenco, Cristina Nistor, Cristina Lavinia Preda, Silviu Petcu, Cristian Teodorescu, Mircea Materials (Basel) Article The present work aims at comparatively studying the effects of the concentrations of a monomer (10–30 wt% based on the whole hydrogel composition), crosslinking agent (1–3 mol% based on the monomer), and reinforcing agent (montmorillonite-MMT, 1–3 wt.% based on the whole hydrogel composition) on the swelling and viscoelastic properties of the crosslinked hydrogels prepared from methacrylic acid (MAA) and N,N′-methylenebisacrylamide (BIS) in the presence of K(2)S(2)O(8) in aqueous solution. The viscoelastic measurements, carried out on the as-prepared hydrogels, showed that the monomer concentration had the largest impact, its three-time enhancement causing a 30-fold increase in the storage modulus, as compared with only a fivefold increase in the case of the crosslinking agent and 1.5-fold increase for MMT in response to a similar threefold concentration increase. Swelling studies, performed at three pH values, revealed that the water absorption of the hydrogels decreased with increasing concentration of both the monomer and crosslinking agent, with the amplitude of the effect of concentration modification being similar at pH 5.4 and 7.4 in both cases, but very different at pH 1.2. Further, it was shown that the increased pH differently influenced the swelling degree in the case of the hydrogel series in which the concentrations of the monomer and crosslinking agent were varied. In contrast to the effect of the monomer and crosslinking agent concentrations, the increase in the MMT amount in the hydrogel resulted in an increased swelling degree at pH 5.4 and 7.4, while at pH 1.2, a slight decrease in the water absorption was noticed. The hydrogel crosslinking density determinations revealed that this parameter was most affected by the increase in the monomer concentration. MDPI 2021-04-29 /pmc/articles/PMC8124361/ /pubmed/33946776 http://dx.doi.org/10.3390/ma14092305 Text en © 2021 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
Ninciuleanu, Claudia Mihaela
Ianchiş, Raluca
Alexandrescu, Elvira
Mihăescu, Cătălin Ionuţ
Scomoroşcenco, Cristina
Nistor, Cristina Lavinia
Preda, Silviu
Petcu, Cristian
Teodorescu, Mircea
The Effects of Monomer, Crosslinking Agent, and Filler Concentrations on the Viscoelastic and Swelling Properties of Poly(methacrylic acid) Hydrogels: A Comparison
title The Effects of Monomer, Crosslinking Agent, and Filler Concentrations on the Viscoelastic and Swelling Properties of Poly(methacrylic acid) Hydrogels: A Comparison
title_full The Effects of Monomer, Crosslinking Agent, and Filler Concentrations on the Viscoelastic and Swelling Properties of Poly(methacrylic acid) Hydrogels: A Comparison
title_fullStr The Effects of Monomer, Crosslinking Agent, and Filler Concentrations on the Viscoelastic and Swelling Properties of Poly(methacrylic acid) Hydrogels: A Comparison
title_full_unstemmed The Effects of Monomer, Crosslinking Agent, and Filler Concentrations on the Viscoelastic and Swelling Properties of Poly(methacrylic acid) Hydrogels: A Comparison
title_short The Effects of Monomer, Crosslinking Agent, and Filler Concentrations on the Viscoelastic and Swelling Properties of Poly(methacrylic acid) Hydrogels: A Comparison
title_sort effects of monomer, crosslinking agent, and filler concentrations on the viscoelastic and swelling properties of poly(methacrylic acid) hydrogels: a comparison
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8124361/
https://www.ncbi.nlm.nih.gov/pubmed/33946776
http://dx.doi.org/10.3390/ma14092305
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