Sol-gel processed porous silica carriers for the controlled release of diclofenac diethylamine.
Silica xerogels doped with diclofenac diethylamine were prepared by the sol-gel method from a hydrolysed tetraethoxysilane (TEOS) solution containing diclofenac diethylamine. Two different catalysts, drying conditions and levels of water content were used to alter the microstructure of the silica xerogels. The aim of this study was to determine the rate of Diclofenac release from the silica xerogels. This in vitro study showed that the sol-gel method is useful for entrapping Diclofenac in the pores of xerogels. It also showed that, in vitro, Diclofenac is released from the silica xerogel, through the pores, by diffusion. Base-catalysed gels proved to be much more effective than acid-catalyzed gels.
Czarnobaj
Katarzyna
K
Department of Physical Chemistry, Medical University of Gdańsk, 80-416 Gdańsk, Poland. kczar@biology.pl
Czarnobaj
Joanna
J
D003692:Delayed-Action Preparations / Q000737:chemistry*; D004008:Diclofenac / Q000008:administration & dosage / Q000493:pharmacokinetics*; D004058:Diffusion; D004337:Drug Carriers / Q000737:chemistry*; D005782:Gels; D007700:Kinetics; D044367:Phase Transition; D012822:Silicon Dioxide
D003692:Delayed-Action Preparations; D004337:Drug Carriers; D005782:Gels; D004008:Diclofenac; D012822:Silicon Dioxide