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Utilization of agricultural by-products to partially replace gelatin in preparation of products for leather
- Taylor, M. M., Bumanlag, L. P., Lee, J., Latona, N. P., Brown, E. M., Liu, C.-K.
- Journal of the American Leather Chemists Association 2015 v.110 no.1 pp. 13-18
- biopolymers, byproducts, chemical reactions, chitosan, functional properties, gelatin, leather, mechanical properties, new products, pectins, polyphenols, renewable resources, whey
- When polyphenolic-modified gelatin-products were used as fillers, improvements were seen in the subjective properties of the leather. When the treated samples were compared to control samples, there were no significant changes in mechanical properties. At the present time, gelatin is in short supply, costs are increasing, and there is an urgent need to find a substitute that could be combined with the gelatin, thereby, partially replacing and reducing the amount of gelatin required, with the goal that the new products would retain the desired characteristics of gelatin products. We have evaluated the potential of producing biopolymers from the reaction of polyphenols with gelatin in combination with other proteins (e.g. whey) or with carbohydrates (e.g. chitosan and pectin). Several researchers have recently demonstrated the feasibility of these reactions. These combinations would take advantage of the distinctive properties of both species, and at the same time, create products with improved functional properties. Recently, the preparation of polyphenolic-modified gelatin/whey biopolymer products was investigated, and the results of product characterization using physicochemical analyses indicated optimal products that could be used as fillers. In this continuing study, these products were applied to wet white, that was then finished, and subjective and mechanical properties were evaluated. At the same time, a method was developed to determine the rate of uptake of the product. Results of the studies will be presented. These findings could further add to the knowledge of using renewable resources in production of unique products that may have leather processing application.