Rose, Neelam M.Yadav, Sharmila2020-02-042020-02-042019http://krishikosh.egranth.ac.in/handle/1/5810142403The present research was intended to prepare antibacterial herbal extracts for application on cotton fabric. To achieve the objectives projected in research plan, jatamansi rhizome extract was selected for antibacterial treatment to cotton fabric. Desizing and scouring were performed on selected cotton fabric for uniform application of finish.The concentrations and conditions for applying the herbal extracts on the fabrics were optimized on the basis of the bacterial resistance efficacy.The application of finish was performed with exhaust and pad-dry-cure methods using the optimized concentrations and conditions. The efficacy of herbal finish was assessed after 5 and 10 wash cycles in terms of percent reduction in bacterial count. The herbal treated fabrics were tested for change in physical properties. Aqueous extract of plant was selected for application on the cotton fabric on the basis of maximum zone of inhibition exhibited against the i.e. Staphylococcus aureus and Escherichia coli bacteria. It was found that yield percentage with repeated maceration (triple percolation) of extract was 13.90 percent for jatamansi rhizome. The optimum variables for antibacterial treatment on the basis of bacterial resistance were9 percent concentration of jatamansi rhizome extract (for both the methods),5 percent concentration of cross linking agent (for both the methods),pH 6 (for both the methods), material to liquor ratio 1:40 for exhaust and 1:20 for pad-dry-cure methods, 60 min at 600Ctreatment time and temperature for exhaust and 30 min at 400C for pad-dry-cure method, 1000C for 5 min drying temperature and time for exhaust and 1200C for 5 min for pad-dry-cure and 1400C for 5 min curing temperature and time. The treated fabrics exhibited 91.31and89.41 percent reduction in the bacterial count of Staphylococcus aureus and Escherichia coli after the application of jatamansi herbal extract by exhaust method whereas after the application of jatamansi herbal extract by pad-dry-cure method 95.39and 95.14 percent reduction in the bacterial count of S. aureus and E. coli respectively was observed. After 5 washing cycles, the treated fabrics exhibited 77.45 and 74.86 percent reduction in the bacterial count of S. aureus and E. coli respectively whereas after 10 washing cycles, the reduction in bacterial count was 53.10 and 51.54 percent for S. aureus and E. coli respectively. For pad-dry-cure method, the bacterial count of S. aureus and E. coli of the washed fabric after 5 washing cycles decreased by 79.76 and 76.29 percent respectively and after 10 washing cycles, the bacterial count of S. aureus and E. coli was decreased by 57.34 and 54.67 percent respectively. The herbal treated fabrics were tested for change in physical properties and it was found that fabric weight, thickness, bending length, flexural rigidity, crease recovery angle and elongation of herbal treated fabric were increased. The herbal treated fabrics exhibited excellent ultraviolet protection i.e. 41.01 by exhaust and 47.10 by pad-dry-cure method. Thus, it is concluded that antibacterial treatment with jatamansi extract imparted multifunctionality to the cotton fabrics it provided very high bacterial resistance properties along with excellent ultraviolet protection and crease resistant properties. Hence, the jatamansi herbal extract is suitable natural antibacterial agent for replacement of synthetic antibacterial agents without harmful effect on the properties of cotton fabric.ennullThesis