Dynamics of Swelling and Drying in a Spherical Gel
| Autor: | Thibault Bertrand, Shomeek Mukhopadhyay, Jorge Peixinho, Christopher W. MacMinn |
|---|---|
| Přispěvatelé: | Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Moisture Dynamics (mechanics) Fluid Dynamics (physics.flu-dyn) FOS: Physical sciences General Physics and Astronomy Physics - Fluid Dynamics 02 engineering and technology Condensed Matter - Soft Condensed Matter 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Swell 0104 chemical sciences Chemical engineering Self-healing hydrogels Drug delivery medicine Soft Condensed Matter (cond-mat.soft) Transient (oscillation) Swelling medicine.symptom 0210 nano-technology [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft] ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Physical Review Applied Physical Review Applied, American Physical Society, 2016, 6 (6), ⟨10.1103/PhysRevApplied.6.064010⟩ |
| ISSN: | 2331-7019 |
| DOI: | 10.1103/physrevapplied.6.064010 |
| Popis: | Swelling is a volumetric-growth process in which a porous material expands by spontaneous imbibition of additional pore fluid. Swelling is distinct from other growth processes in that it is inherently poromechanical: Local expansion of the pore structure requires that additional fluid be drawn from elsewhere in the material, or into the material from across the boundaries. Here, we study the swelling and subsequent drying of a sphere of hydrogel. We develop a dynamic model based on large-deformation poromechanics and the theory of ideal elastomeric gels, and we compare the predictions of this model with a series of experiments performed with polyacrylamide spheres. We use the model and the experiments to study the complex internal dynamics of swelling and drying, and to highlight the fundamentally transient nature of these strikingly different processes. Although we assume spherical symmetry, the model also provides insight into the transient patterns that form and then vanish during swelling as well as the risk of fracture during drying. |
| Databáze: | OpenAIRE |
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