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A Study on Benzoylation and Graft Copolymerization of Lignocellulosic Cannabis indica Fiber

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Abstract

Present work deals with the surface modification of Cannabis indica fiber through benzoylation and graft copolymerization of acrylonitrile (AN) onto C. indica fibers under the influence of microwave radiations. The Benzoylation of C. indica fiber was carried out by treating raw fiber with varying concentrations of benzoyl chloride solution. Different reaction parameters for graft copolymerization, such as reaction time, initiator concentration, nitric acid concentration, pH and monomer concentration were optimized to get the maximum percentage of grafting (25.54%). A suitable mechanism to explain benzoylation and graft copolymerization has been also proposed. Raw C. indica fiber, graft copolymerized and benzoylated fibers were subjected to evaluation of some of their properties like swelling behavior, moisture absorbance and resistance towards chemicals. Cannabis indica fibers treated with 5% benzoyl chloride solution and AN graft copolymerized fibers have been found to show more resistant towards moisture, water and chemicals when compared with that of untreated fibers. Morphological, structural changes, thermal stability and crystallanity of raw, graft copolymerized and benzoylated fibers have also been studied by SEM, FTIR, TGA and XRD techniques. It has been observed that the crystallinity of fiber decreases but thermal stability increases on surface modification.

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Acknowledgments

Authors are highly thankful to the Director, National institute of Technology Hamirpur (H.P) India for providing the laboratory facilities and Ministry Of Human Resources and Development for financial support.

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Authors and Affiliations

  1. Applied Chemistry Research Laboratory, Department of Chemistry, National Institute of Technology, Hamirpur, 177005, Himachal Pradesh, India

    A. S. Singha & Ashvinder K. Rana

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  1. A. S. Singha
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  2. Ashvinder K. Rana
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Correspondence to A. S. Singha.

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Singha, A.S., Rana, A.K. A Study on Benzoylation and Graft Copolymerization of Lignocellulosic Cannabis indica Fiber. J Polym Environ 20, 361–371 (2012). https://doi.org/10.1007/s10924-011-0370-9

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