Abstract. A three-dimensional mathematical model for sorption/desorption by a cylindrical polymeric matrix with dispersed drug is proposed. The model is based on a system of partial differential equations coupled with boundary conditions over a moving boundary. We assume that the penetrant diffuses into a swelling matrix and causes a deformation, which induces a stressdriven diffusion and consequently a non-Fickian mass flux. A physically sound nonlinear dependence between strain and penetrant concentration is considered and introduced in a Boltzmann integral with a kernel computed from a Maxwell–Wiechert model. Numerical simulations show how the mechanistic behavior can have a role in drug delivery design.

A 3D model for mechanistic control of drug release

GRASSI, Mario;
2014-01-01

Abstract

Abstract. A three-dimensional mathematical model for sorption/desorption by a cylindrical polymeric matrix with dispersed drug is proposed. The model is based on a system of partial differential equations coupled with boundary conditions over a moving boundary. We assume that the penetrant diffuses into a swelling matrix and causes a deformation, which induces a stressdriven diffusion and consequently a non-Fickian mass flux. A physically sound nonlinear dependence between strain and penetrant concentration is considered and introduced in a Boltzmann integral with a kernel computed from a Maxwell–Wiechert model. Numerical simulations show how the mechanistic behavior can have a role in drug delivery design.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2808931
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