Surface modification of ramie fibers using microwave assisted graft copolymerization followed by brevibacillus parabrevis pretreatment

Susheel Kalia, Renu Sheoran, Hemmant Mittal, Amit Kumar

    Research output: Contribution to journalArticlepeer-review

    11 Scopus citations

    Abstract

    Ramie fibers usually display poor interfacial adhesion when reinforced in hydrophobic polymer matrices. Hydrophilic nature of natural fibers becomes the most crucial issue in composites engineering. Surface modification of natural fibers has been found to be very effective in improving the fiber-matrix adhesion. In the present paper, we have reported the microwave assisted grafting of binary vinyl monomer mixtures on to ramie fibers (Boehmeria nivea) and bacterial cellulase assisted pre-treatment of ramie fibers using bacteria Brevibacillus parabrevis. The effects of these pretreatments on some properties of ramie fibers are discussed in the present paper. The modified fibers were characterized by scanning electron microscopy (SEM), X-ray diffraction, and TGA/DTA techniques to determine their morphology, crystallinity and thermal stability. Surface of ramie fiber becomes rough on grafting with synthetic polymers, whereas biologically modified ramie fibers showed the enhanced softness and smooth appearance due to the removal of gum materials and other impurities from the surface of fibers. Both the treatments have slightly changed the thermal stability and crystallinity of ramie fibers.

    Original languageBritish English
    Pages (from-to)742-748
    Number of pages7
    JournalAdvanced Materials Letters
    Volume4
    Issue number10
    DOIs
    StatePublished - Oct 2013

    Keywords

    • Cellulase
    • Graft copolymers
    • Morphology
    • Ramie fibers
    • Thermogravimetric analysis

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