Preparation of gelatin grafted vinyl acetate-methylmethacrylate nanocomposite
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Date
2015
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UNIVERSITY OF MANAGEMENT AND TECHNOLOGY
Abstract
The thought to make the environment green and restrict fossil sources is increasing day by day. Scientists are taking interest in producing green materials from renewable sources as they are biodegradable and non-toxic to living being and atmosphere. To get better response of those materials in technological terms, in particular thermal, mechanical and barrier properties, nanocomposites are commonly used. The alteration of natural polymers is a capable method for the synthesis of novel materials. In few years, great deal of attention has been exposed in the improvement of the production of natural-based nano composites. It is true that polymers and their yield have altered the appearance of the world in all the playing field of the expertise but these synthetic non biodegradable polymers have produced a dangerous condition for a hale and hearty life. So at this time our main concern to alter our research from non-biodegradable polymeric product to the biodegradable polymeric products. Proteins are extensively spread in nature. We select gelatine in our study because it is a self-assembled, nontoxic, biodegradable and inexpensive material. It is mostly used in pharmaceutical, food, photographic industries etc .Moreover, peptide units show high selectivity to interact with metal oxide. Conversely, toughness and brittleness of gelatin films caused difficulty in synthesis, which comes from their slight swelling behaviour in aqueous medium. In this study Gelatin-g-vinyl acetate methylmethacrylate Nanocomposite was prepared by free radical polymerization technique. Graft polymerization of vinylic monomers on their backbones in the existence of cross linkers is a competent approach to alter natural polymers. Results shows that this novel Nanocomposite can help in alter non-biodegradable polymeric product to the biodegradable polymeric products. That's why, in this study, we illustrate the preparation and characterization of a gelatin-g-poly(vinyl acetate methyl methacrylate) nanocomposite as a new natural-based polymer. The degradation studies showed degradation of polymer up to 44.39% and degradation with nanoparticle showed 46.67% degradation. The results showed that the grafting was a flexible tool to impart biodegradation to non biodegradation polymers. In addition of nanoparticle gave them a resistance against microbes up to an extent. Therefore this nano composite can be used successfully as biodegradable food packaging material.
Description
Supervisor: Dr. Sammia Shahid
Keywords
MS Thesis, Gelatin, Grafted vinyl, Acetate-methylmethacrylate nanocomposite