Dynamics of solvent release from polymer gels with small solvent-filled cavities is investigated starting from a thermodyna- mically consistent and enriched multiphysics stress-diffusion model. Indeed, the modeling also accounts for a new global volumetric constraint which makes the volume of the solvent in the cavity and the cavity volume equal at all times. This indu- ces a characteristic suction effect into the model through a negative pressure acting on the cavity walls. The problem is solved for gel-based spherical microcapsules and microtubules. The implementation of the mathematical model into a finite element code allows to quantitatively describe and compare the dynamics of solvent release from full spheres, hollow spheres, and tu- bules in terms of a few key quantities such as stress states and amount of released solvent under the same external conditions.

Curatolo, M., Nardinocchi, P., Teresi, L. (2020). Modeling solvent dynamics in polymers with solvent-filled cavities. MECHANICS OF SOFT MATERIALS, 2(1) [10.1007/s42558-020-00029-0].

Modeling solvent dynamics in polymers with solvent-filled cavities

Luciano Teresi
2020

Abstract

Dynamics of solvent release from polymer gels with small solvent-filled cavities is investigated starting from a thermodyna- mically consistent and enriched multiphysics stress-diffusion model. Indeed, the modeling also accounts for a new global volumetric constraint which makes the volume of the solvent in the cavity and the cavity volume equal at all times. This indu- ces a characteristic suction effect into the model through a negative pressure acting on the cavity walls. The problem is solved for gel-based spherical microcapsules and microtubules. The implementation of the mathematical model into a finite element code allows to quantitatively describe and compare the dynamics of solvent release from full spheres, hollow spheres, and tu- bules in terms of a few key quantities such as stress states and amount of released solvent under the same external conditions.
Curatolo, M., Nardinocchi, P., Teresi, L. (2020). Modeling solvent dynamics in polymers with solvent-filled cavities. MECHANICS OF SOFT MATERIALS, 2(1) [10.1007/s42558-020-00029-0].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/377495
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