A mechanistic modelling approach to polymer dissolution using magnetic resonance microimaging

• In this paper a computationally efficient mathematical model describing the swelling and dissolution of a polyethylene oxide tablet is presented. The model was calibrated against polymer release, front position and water concentration profile data inside the gel layer, using two different diffusion models. The water concentration profiles were obtained from magnetic resonance microimaging data which, in addition to the previously used texture analysis method, can help to validate and discriminate between the mechanisms of swelling, diffusion and erosion in relation to the dissolution process. Critical parameters were identified through a comprehensive sensitivity analysis, and the effect of hydrodynamic shearing was investigated by using two different stirring rates. Good agreement was obtained between the experimental results and the model. (C) 2010 Elsevier B.V. All rights reserved.

Ämnesord

NATURVETENSKAP  -- Kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Chemical Engineering (hsv//eng)

Nyckelord

ALE

erosion

glassy-polymers

Dissolution

reptation

Mathematical modelling

MRI

poly(ethylene oxide)

drug-delivery

hpmc matrices

mathematical-models

release

Polyethylene oxide

diffusion

rubbery

Publikations- och innehållstyp

art (ämneskategori)

ref (ämneskategori)