Interpenetrating network (IPN) beads of sodium carboxymethyl cellulose (SCMC) and sodium carboxymethyl xanthan (SCMX) containing diclofenac sodium (DS), a non steroidal anti-inflammatory drug were prepared by single water-in-water (w/w) emulsion gelation process using AlCl3 as the cross-linking agent. The influence of different formulation variables like polymer ratio, gelation time, concentration of cross-linking agenton in-vitro physico-chemical parameters and drug release studies were performed. The tailored IPN bead were analytically evaluated by Scanning electron microscopy (SEM), Fourier Transform Infra-red (FTIR), X-ray diffraction (XRD), Differential Scanning Calorimetry (DSC) analysis. IPN beads showed improved drug encapsulation efficiency along with enhanced intestinal drug release.
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Bhattacharya et al. (2013) studied this question.
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