Swelling Behavior of Anionic Hydrogels
Author Information
Author(s): De Piano Raffaella, Caccavo Diego, Barba Anna Angela, Lamberti Gaetano
Primary Institution: Department of Industrial Engineering, University of Salerno, Italy
Hypothesis
This study aims to investigate the impact of pH and ionic strength on both the steady state and unsteady behavior of anionic hydrogels.
Conclusion
The study found that the swelling behavior of anionic hydrogels is influenced by pH and ionic strength, with a bell-shaped pH-dependent swelling behavior that is mitigated by increased ionic strength.
Supporting Evidence
- Hydrogels can absorb and release water, causing them to swell and shrink.
- Anionic polyelectrolyte hydrogels show complex behavior depending on pH and ionic strength.
- The swelling ratio of hydrogels reaches a maximum at intermediate pH values.
Takeaway
Anionic hydrogels can change size based on the acidity of the solution and how much salt is in it, which is important for making smart materials.
Methodology
The study combined experiments and modeling, using mechanical tests and gravimetric analyses to track hydrogel mass over time under varying pH and salt concentrations.
Digital Object Identifier (DOI)
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