Electric field-controlled benzoic acid and sulphanilamide delivery from poly(vinyl alcohol) hydrogel.
AAPS PharmSciTech
; 13(4): 1407-15, 2012 Dec.
Article
en En
| MEDLINE
| ID: mdl-23065453
The controlled release of benzoic acid (3.31 Å) and sulphanilamide (3.47 Å) from poly(vinyl alcohol), PVA, hydrogels fabricated by solution casting at various cross-linking ratios, were investigated. The PVA hydrogels were characterized in terms of the degree of swelling, the molecular weight between cross-links, and the mesh size. The drug release experiment was carried out using a modified Franz diffusion cell, at a pH value of 5.5 and at temperature of 37°C. The amount of drug release and the diffusion coefficients of the drugs from the PVA hydrogels increased with decreasing cross-linking ratio, as a larger mesh size was obtained with lower cross-linking ratios. With the application of an electric field, the amount of drug release and the diffusion coefficient increased monotonically with increasing electric field strength, since the resultant electrostatic force drove the ionic drugs from the PVA matrix. The drug size, matrix pore size, electrode polarity, and applied electric field were shown to be influential controlling factors for the drug release rate.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Alcohol Polivinílico
/
Sulfanilamidas
/
Hidrogel de Polietilenoglicol-Dimetacrilato
/
Ácido Benzoico
Idioma:
En
Revista:
AAPS PharmSciTech
Asunto de la revista:
FARMACOLOGIA
Año:
2012
Tipo del documento:
Article
País de afiliación:
Tailandia
Pais de publicación:
Estados Unidos