Antioxidant and Antibacterial Bio-functionalization Properties of Cotton Fabric Dyed with Acetonic Extracts of Prosopis Juliflora using Bio-Mordants
Natural dyes have been taunted as a potential alternative to their often-hazardous synthetic counterparts due to their degradability, non-toxicity and eco-friendliness. In addition to their dyeing properties, natural dyes are equally known to have medicinal properties such as antimicrobial and antifungal activities. Prosopis juliflora, commonly referred to as Mathenge, is a noxious weed listed by International Union for Conservation of Nature (IUCN) among the most unwanted plants. In Kenya, the plant has adverse effects on livestock and the environment. The aim of the study, was to develop biofunctionalized fabric with antioxidant and antibacterial properties that can be used for their medicinal properties using natural dyes extracted from P. juliflora. The objectives of this study, were to evaluate the effects of biomordants on the dyeing properties of the extracts of P. juliflora and to evaluate the antioxidant and antimicrobial textile finishing properties of the natural dye on cotton fabric. The bio-mordants used were tannic acid and mango bark. The antioxidant activity of the dyed cotton fabric was determined by use of 2,2 -diphenyl-1-picrylhydrazyl radical (DPPH) method whereas the antimicrobial properties of the dyed fabric, were done against Escherichia coli and Staphylococcus aureus strains of bacteria using the absorbance method. The use of bio-mordants increased the color strength from 0.63 to 0.76 and 0.79 for mango bark and tannic acid respectively. On the other hand, P. juliflora dyed fabric , equally showed antioxidant properties of 69.4 %, with the dye imparted on the fabric, showing potent antimicrobial reduction abilities of 64.34 % and 66.72 % against E. coli and S. aureus, respectively, to the fabric. Therefore, from the results, it can be concluded that P.juliflora dye, is suitable for use as a natural dye with potent antimicrobial properties hence it can be used for the development of medicinal fabric.
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