Swelling Behavior of Anionic Hydrogels: Experiments and Modeling
| Title: | Swelling Behavior of Anionic Hydrogels: Experiments and Modeling |
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| Authors: | Raffaella De Piano, Diego Caccavo, Anna Angela Barba, Gaetano Lamberti |
| Source: | Gels, Vol 10, Iss 12, p 813 (2024) |
| Publisher Information: | MDPI AG, 2024. |
| Publication Year: | 2024 |
| Collection: | LCC:Science LCC:Chemistry LCC:Inorganic chemistry LCC:General. Including alchemy |
| Subject Terms: | polyelectrolytes, anionic hydrogels, pH, ionic strength, modeling, Science, Chemistry, QD1-999, Inorganic chemistry, QD146-197, General. Including alchemy, QD1-65 |
| More Details: | Polyelectrolyte hydrogels are smart materials whose swelling behavior is governed by ionizable groups on their polymeric chains, making them sensitive to pH and ionic strength. This study combined experiments and modeling to characterize anionic hydrogels. Mechanical tests and gravimetric analyses were performed to track hydrogel mass over time and at a steady state under varying pH and salt concentrations. The swelling ratio exhibited a bell-shaped curve with pH, reaching 120 in pure water, and decreased with increasing salt concentrations. Transient regimes showed slower swelling (~40 h) under pH stimulation compared to faster deswelling (~20 h) induced by salt. A fully coupled model integrating mass transport and solid mechanics was developed, with solvent diffusivity as the sole adjustable parameter in transient simulations. In conclusion, this study combined experiments and modeling to uncover complex mechanisms in PE behavior under two external stimuli, providing insights essential for designing advanced hydrogels. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2310-2861 |
| Relation: | https://www.mdpi.com/2310-2861/10/12/813; https://doaj.org/toc/2310-2861 |
| DOI: | 10.3390/gels10120813 |
| Access URL: | https://doaj.org/article/241fd919ab704489b5b3fc375b7c5133 |
| Accession Number: | edsdoj.241fd919ab704489b5b3fc375b7c5133 |
| Database: | Directory of Open Access Journals |
| ISSN: | 23102861 |
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| DOI: | 10.3390/gels10120813 |
| Published in: | Gels |
| Language: | English |