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Chaudhary Charan Singh Haryana Agricultural University, Hisar

Chaudhary Charan Singh Haryana Agricultural University popularly known as HAU, is one of Asia's biggest agricultural universities, located at Hisar in the Indian state of Haryana. It is named after India's seventh Prime Minister, Chaudhary Charan Singh. It is a leader in agricultural research in India and contributed significantly to Green Revolution and White Revolution in India in the 1960s and 70s. It has a very large campus and has several research centres throughout the state. It won the Indian Council of Agricultural Research's Award for the Best Institute in 1997. HAU was initially a campus of Punjab Agricultural University, Ludhiana. After the formation of Haryana in 1966, it became an autonomous institution on February 2, 1970 through a Presidential Ordinance, later ratified as Haryana and Punjab Agricultural Universities Act, 1970, passed by the Lok Sabha on March 29, 1970. A. L. Fletcher, the first Vice-Chancellor of the university, was instrumental in its initial growth.

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Subject: Textile and Apparel Designing × Author: Bhandari, Babita × End date: 2014 × Type: Thesis ×
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    ThesisItemOpen Access
    Effect of sericin treatment on dyeability of cotton fabric using natural dye
    (CCSHAU, 2014) Bhandari, Babita; Saroj S. Jeet Singh
    The present research was planned to study the effect of sericin treatment on dyeability of cotton fabric using a natural dye. To achieve the objectives proposed in the research plan, cotton fabric suitable for apparel use during summer season was selected, desized and scoured. Four easily available dyes i.e. Kachnar bark, Manjistha root, Neem leaves and Safflower flowers were tried for the study. Sericin treated fabrics were dyed with all four dyes using their standardized dyeing procedure which were taken from secondary sources. One natural dye was selected on the basis of effect of sericin treatment on maximum percent dye absorption and wash fastness. Different variables i.e. sericin concentration, treatment temperature, treatment time, pH, material to liquor ratio (MLR), treatment stage, combination and concentrations of auxiliaries, drying temperature and time, curing temperature and time were optimized on the basis of maximum percent dye absorption and wash fastness for standardizing sericin application process. Sericin treated and untreated dyed fabrics were tested for colourfastness properties. L, a*, b* and K/S values of dyed fabrics were also compared. Effect of sericin treatment on change in physical properties regarding fabric count, thickness, weight, flexural rigidity, tensile strength, elongation, crease recovery, wettabiliy and air permeability were examined. Effect of sericin treatment and dyeing on ultraviolet protection property of cotton fabric was also investigated. Out of tried dyes manjistha was found to have maximum dye absorption after sericin treatment. Different variables i.e. 0.50 % sericin, 4 % crosslinking agent (citric acid), 1% catalyst (sodium hypophosphite), 45 minutes treatment time, 50°C treatment temperature, M:L ratio 1:30, pH 8, drying temperature 70°C, drying time 4 minutes, curing temperature 160°C and curing time 2 minutes were selected for sericin treatment on the basis of maximum percent dye absorption and wash fastness. It was found that the dye absorption of the treated fabric increased from 19.5 to 31.7 percent using optimized variables. Sericin treated dyed fabric also exhibited better colourfastness ratings as compared to untreated dyed fabric. Fabric treated with sericin was redder, yellower and brighter indicated by lower L* value and higher a*, b* and C* values. Fabric count, weight and thickness did not show any significant change however tensile strength, bending length, crease recovery and wettability increased by 8.5 3.1, 9.3 and 49.02 percent. Moreover, elongation and air permeability decreased by 8.3 and 10.35 percent upon sericin treatment. Ultraviolet protection factor of sericin treated cotton fabric increased to 22.39 from 14.25 of scoured cotton fabric. Manjistha dyed fabric exhibited very good UPF (32.6) whereas sericin treated dyed fabric offered excellent ultraviolet protection (48.4). Thus sericin treatment can be given to cotton fabric using natural dyes to improve dye uptake without affecting the hue and physical properties of the dyed fabric.