http://nopr.niscpr.res.in/handle/123456789/57627 2026-10-08T23:55:24Z http://nopr.niscpr.res.in/handle/123456789/57646 Title: Optimization of thermo - physiological properties of structurally modified wool/polyester blended fabrics using desirability function Authors: Bhatia, Dinesh; Sinha, S K Abstract: The thermo-physiological properties of handloom fabrics produced with or without modified wool/polyester yarns in the weft has been studied. Yarn samples at different blend compositions are prepared according to mixture design at a different percentage of fibres using design expert software. The effect of percentage of different fibres, namely polyester, wool and PVA, on different thermo-physiological properties along with fabric properties obtained for different fibres after the dissolution of PVA component at yarn stage or fabric stage have also been studied. This paper also reports the potential of different fibres optimization to achieve maximum desirability for different thermo-physiological properties of treated (at yarn stage and fabric stage) and untreated fabrics with the help of desirability function. Treated fabrics at both stages show better thermo-physiological comfort properties as compared to untreated fabrics. In general, after dissolution of the PVA component both at the yarn stage or at the fabric stage, the treated fabric gives a higher value of thermal resistance, compressibility, drying capacity and water vapour permeability, while a lower value of air permeability and bending rigidity in comparison with untreated fabrics. Results of optimization for treated (at yarn stage and fabric stage) fabrics show higher overall desirability that can be achieved by using less percentage of wool fibres in case of treated fabrics (either at yarn stage or fabric stage). Page(s): 111-119 2021-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/57645 Title: Seam grinning behavior of single jersey fabric Authors: Bansal, Payal; Choudhary, AK; Sikka, Monica Abstract: Influence of fibre, yarn count, loop length and fabric direction on seam grinning behavior of a single jersey fabric has been investigated. A 33 Box–Behnken design is employed to investigate the influence of various parameters on seam grinning behavior of single jersey fabric. The test results show that the seam grinning d5ecreases for the specimen having lycra filament but it is maximum for 100% cotton specimen. At higher value of loop length, seam grinning decreases in cotton and polyester/cotton fabrics but increases for polyester-lycra and cotton-lycra fabric samples. It had also been seen that seam grinning is higher in wale-wise and bias direction as compared to that in course-wise direction. Hence, seam grinning can be reduced by choosing appropriate values of yarn count, loop length for a particular kind of fibre. This study will be helpful for garment industrialist to minimise the seam grinning effect among knitted garments and to improve quality of producing seam. Page(s): 120-126 2021-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/57644 Title: Modulation of cross-sectional structure of air-vortex yarn through process variables Authors: Tripathi, Lekhani; Ishtiaque, S M Abstract: Influence of process parameters on structural mechanics of air-vortex polyester cotton (65/35) blended yarn has been studied. Box-Behnken three variables design is used to optimize the spindle diameter, nozzle pressure and yarn delivery speed to achieve the required packing density of air vortex yarn. Image processing technique is used to measure the fibre area in different concentric zones. The study confirms that the yarn packing density and radial packing density of yarns are influenced by individual as well as interaction effect of process parameters. The packing density is not found to be maximum near the yarn axis. It is depicted that packing density of core, intermediate and surface zones of the yarn shows an increase with the increase in nozzle pressure, and decrease with the increase in spindle diameter and yarn delivery speed. The packing density of ring-spun yarn is found to be higher than vortex yarns with distinctly higher packing in the core- zone of the yarn. Page(s): 127-136 2021-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/57643 Title: Electrospinning and optical properties of polyacrylonitrile / carbon quantum dots fluorescent nanocomposite nanofibres Authors: Heidari, M; Nateri, A Shams; Nouri, M; Asadi, L Abstract: The optical properties and structural characteristics of polyacrylonitrile nanofibres containing two different types of fluorescent compounds, prepared by an electrospinning technique have been studied. The electrospinning solution has been prepared by dissolving the PAN powder at various concentrations in N,N- dimethyl formamide. Carbon quantum dots nanoparticles (CQD) as a fluorescent agent, and Disperse Blue 354 as a fluorescent dye, have been used to produce fluorescent composite nanofibres. The effect of the fluorescent agent on the optical properties of the nanofibres has been evaluated by producing nanofibres with fluorescent dye or CQD nanoparticles at various concentrations. The structural and optical properties of the collected composites nanofibres are characterized using polarizing optical microscopy, field emission-scanning electron microscopy and photoluminescence spectrometry. The results show that the emission and fluorescent properties of the nanofibres depend on the nanofibres diameter, and the type and concentration of the fluorescent materials. The fluorescence intensity is increased with decreasing diameter of the fluorescent nanofibres. In addition, the emission of the nanofibres containing the CQDs is greater than that of the pure nanofibres and nanofibres with the fluorescent dye. Page(s): 137-143 2021-06-01T00:00:00Z