Journal
JOURNAL OF BIOACTIVE AND COMPATIBLE POLYMERS
Volume 24, Issue 6, Pages 525-545Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0883911509349687
Keywords
carboxymethylcellulose/gelatin hydrogel; interpenetrated-interconnected network; drug delivery; microbiological test; control by diffusion
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Hydrogels based on carboxymethylcellulose (CMC) and gelatin (GEL) crosslinked with glutaraldehyde were used to obtain interpenetrated interconnecting polymer networks. They are designed to obtain controlled release polymeric drug systems. CMC and GEL were chosen for their biocompatibility and nontoxicity, which are compulsory conditions for polymers used in biomedical applications. By modifying the parameters of the crosslinking reaction, the obtained networks presented different crosslinking degrees and hence different swelling capacities. These properties determined the quantity of drug able to be loaded (0.25 g per gram of hydrogel). We obtained systems for which biologically active matter release was controlled by diffusion. The kinetics were zero-order during the major part of release period (similar to 500 min). These systems improve the bactericide activity compared with free drugs.
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