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Controlled drug release behavior of 5-aminosalicylic acid using polyacrylamide grafted oatmeal (OAT-g-PAM): a pH-sensitive drug carrier

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Abstract

In the present investigation, we have evaluated the in vitro drug release of 5-aminosalicylic acid (5-ASA) using polyacrylamide grafted oatmeal (OAT-g-PAM). The graft co-polymer was synthesized by following free radical co-polymerization pathway using acrylamide as a monomer and ceric ammonium nitrate as a free radical initiator in the presence of microwave. The matrix tablet was prepared using the different grades of developed graft co-polymers following standard protocol. In vitro release phenomena of 5-ASA from the prepared matrix tablet up to 12 h in different buffer solution, i.e., pH 2.0, 7.0 and 7.4, an ideal condition for colon specific drug delivery was studied. The release rate of 5-ASA can be controlled efficiently by tuning the pH value. The drug release kinetic of 5-ASA from different matrix tablet was evaluated on the basis of in vitro controlled drug release results. The result indicates that the novel pH-sensitive matrices under study showing Fickian diffusion mechanism and potentially constructive for colonic drug delivery system.

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Acknowledgements

Authors deeply acknowledge the financial support received from Department of Science and Technology, New Delhi, India, in form of research grant (Letter No.: SR/FT/CS-113/2011 dated 29/06/2012).

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  1. Department of Chemistry, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, 835215, India

    Srijita Bharti & Sumit Mishra

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  1. Srijita Bharti
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  2. Sumit Mishra
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Correspondence to Srijita Bharti.

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Bharti, S., Mishra, S. Controlled drug release behavior of 5-aminosalicylic acid using polyacrylamide grafted oatmeal (OAT-g-PAM): a pH-sensitive drug carrier. Polym. Bull. 76, 813–824 (2019). https://doi.org/10.1007/s00289-018-2407-x

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  • DOI: https://doi.org/10.1007/s00289-018-2407-x

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