Exploring RSM-CCD-optimized chitosan-/gelatin-based hybrid polymer network containing CPM–β-CD inclusion complexes as controlled drug delivery systems.

The present work reported the synthesis of pH-responsive hybrid polymer network (HPN) of chitosan and gelatine by using glutaraldehyde as a cross-linker. Different reaction parameters like backbone ratio, amount of solvent, pH, the time, the temperature of reaction mixture and concentration of cross-linker were optimized with response surface methodology in order to maximize the percentage swelling. The maximum percentage swelling was obtained 530.48% under most optimized conditions of the ratio (1:1), pH (7) and cross-linker (0.241 mol/l). Poor loading of drug in traditional drug delivery is improved by incorporating preformed inclusion complex of chlorphenamine maleate (CPM) with β-cyclodextrin (1:1) under microwave conditions directly into the HPN matrix. Further, HPN matrix was used to investigate the in situ controlled release of CPM under different pH conditions at 37 °C. CPM release showed the best fit to the Peppas–Sahlin equation under all pH conditions at 37 °C. Thus, HPN prepared by using RSM design is a good device to deliver the CPM in a controlled manner. [ABSTRACT FROM AUTHOR]