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The Syntheses and Characterization of Molecularly Imprinted Polymers for the Controlled Release of Bromhexine

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Abstract

Imprinted polymers are now being increasingly considered for active biomedical uses such as drug delivery. In this work, the use of molecularly imprinted polymers (MIPs) in designing new drug delivery devices was studied. Imprinted polymers were prepared from methacrylic acid (functional monomer), ethylene glycol dimethacrylate (cross-linker), and bromhexine (as a drug template) using bulk polymerization method. The influence of the template/functional monomer proportion and pH on the achievement of MIPs with pore cavities with a high enough affinity for the drug was investigated. The polymeric devices were further characterized by FT-IR, thermogravimetric analysis, scanning electron microscopy, and binding experiments. The imprinted polymers showed a higher affinity for bromhexine and a slower release rate than the non-imprinted polymers. The controlled release of bromhexine from the prepared imprinted polymers was investigated through in vitro dissolution tests by measuring absorbance at λ max of 310 nm by HPLC-UV. The dissolution media employed were hydrochloric acid at the pH level of 3.0 and phosphate buffers, at pH levels of 6.0 and 8.0, maintained at 37.0 and 25.0 ± 0.5 °C. Results from the analyses showed the ability of MIP polymers to control the release of bromhexine In all cases The imprinted polymers showed a higher affinity for bromhexine and a slower release rate than the non-imprinted polymers. At the pH level of 3.0 and at the temperature of 25 °C, slower release of bromhexine imprinted polymer occurred.

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Acknowledgments

The authors would like to thank Mr. Roghanizad for his technical assistance in experiments.

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Authors and Affiliations

  1. Department of Chemistry, Amirkabir University of Technology, Tehran, Iran

    Saman Azodi-Deilami, Majid Abdouss & Mehran Javanbakht

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  1. Saman Azodi-Deilami
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  2. Majid Abdouss
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  3. Mehran Javanbakht
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Correspondence to Majid Abdouss.

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Azodi-Deilami, S., Abdouss, M. & Javanbakht, M. The Syntheses and Characterization of Molecularly Imprinted Polymers for the Controlled Release of Bromhexine. Appl Biochem Biotechnol 164, 133–147 (2011). https://doi.org/10.1007/s12010-010-9121-y

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  • DOI: https://doi.org/10.1007/s12010-010-9121-y

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