Browsing by Author "Nagpal, Aditi"
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ThesisItem Open Access Application of weed plants extracts on cotton and silk for microbial resistance(CCSHAU, 2017) Nagpal, Aditi; Punia, ParveenThe present research was planned study to the effect of weed plant extracts and their different standardized combinations on cotton and silk fabrics. To achieve the objectives, in the research plan, two weed plants Achyranthes asper and Boerhaavia diffusa were selected for finish application on cotton and silk fabric. Pre-treatment was given to cotton and silk fabric and finish was applied on both the fabrics in different standardized concentrations of Achyranthes asper and Boerhaavia diffusa extracts with exhaust and pad-dry-cure method. Different standardized concentrations were, for Achyranthes asper extract 3.5 concentration by exhaust method and 3.0 concentration by pad-dry-cure method on cotton fabric whereas in case of silk fabric 3.0 concentration for exhaust method and 2.5 concentration for pad-dry-cure method. For Boerhaavia diffusa extract by exhaust method 3.5 concentration and by pad-dry-cure method 3.0 concentration on cotton fabric whereas results of silk fabric show that 3.0 concentration for exhaust method and 2.5 concentration for pad-dry-cure method. Standardization of concentrations and combinations was done on the basis of minimum bacterial count. It was found that percentage yield of extract was 6% for Achyranthes asper and 8% for Boerhaavia diffusa extract. Pseudomonas sp. bacteria were selected for the present study. To study the effect of weed plant extract and their combinations the finished samples were tested for microbial resistance activity quantitatively by AATCC-100 test method before and after washing of samples. After assessment of microbial activity against Pseudomonas sp. bacteria percent reduction all finished were found effective against Pseudomonas sp. bacteria after inoculation. The antibacterial treatment with different standardized concentrations of weed plant extracts and their combinations with dilution factors was very effective after 24 hours of inoculation of Pseudomonas sp. bacteria After 24 hours percent bacterial reduction gradually decreased up to 21st days of inoculation. The weed plant extracts and their different combinations finished samples exhibited good wash durability after 24 hours of inoculation in washed samples (5 and 10 washes). After 24 hours it gradually decreased and reduced up to 21st days of inoculation. Thus, after washing there was continuous decrease in the antibacterial activity with an increase in incubation period. It was further concluded that after inoculation of Pseudomonas sp. bacteria microbes do not affect the physical properties of the finished samples heavily. Finished fabrics were tested for physical properties and found that fabric weight, thickness, bending length and elongation increased while tensile strength, moisture regain, wicking, airpermeability and air porosity decreased as compared to control samples. After washing physical properties of finished fabric were investigated and found that fabric weight, thickness, bending length and tensile strength decreased whereas there was increase in air-permeability, air porosity, moisture regain, wicking and elongation as compared to unwashed samples.ThesisItem Open Access Improvement of colour fastness of tie-dyed cotton(CCSHAU, 2010) Nagpal, Aditi; Rose, Neelam M.The present study was conducted for the improvement of colour fastness of tie-dyed cotton. Three direct dyes i.e red, yellow and blue (primary colours) commonly available in the local market were selected for dyeing cotton i.e light, medium and heavy weight fabric. Standardization of dyeing variable viz. dye concentration, dyeing temperature, dyeing time, dyeing pH and different auxiliaries concentrations were optimized on the basis of percent dye absorption and visual appearance. For improvement of colour fastness properties of cotton fabric dyed with direct dyes, locally available five treatment agents were selected for each dye. Treatment agents and their concentration along with treatment stage were optimized on the basis of their fastness grades. Tie-dyed samples treated with each treatment agent were also evaluated for their colour fastness properties regarding washing and sunlight. It is summarized that 6, 7, and 8 percent was the optimum dye concentration for light, medium and heavy weight fabric, respectively. The optimum dyeing temperature was 1000C, optimum dyeing time was 60 minutes and optimum dyeing pH was 8 for all the three selected dyes viz. red, yellow and blue. 2 percent concentration of sodium carbonate and 20 percent concentration of sodium chloride were used for all the three selected dyes as it gave maximum dye absorption. Acid, alum, dye fixer, mustard oil and vinegar were used as treatment agents for all the three selected dyes. In most of the cases, post-treatment gave best results. Fastness properties increased after using treatment agents in all the cases.