http://nopr.niscpr.res.in/handle/123456789/59978 2026-10-09T19:44:19Z http://nopr.niscpr.res.in/handle/123456789/60004 Title: Development of biodegradable tri-blended fabrics with improved moisture management properties using cotton/polylactic-acid/bamboo-viscose fibres Authors: Prasad, G Krishna; Guruprasad, R; Senthilkumar, T; Prabu, G T V; Raja, A S M Abstract: The influence of fibre blend composition on the moisture management properties of tri-blended cotton-rich knit fabrics with biodegradability has been studied. The cotton, polylactic acid and bamboo-viscose fibres are blended to produce yarns of 14.7 tex (40s Ne) with four different blend proportions, namely 60/20/20, 50/30/20, 50/20/30 and 40/30/30. The yarns are then knitted into a single jersey structure of 130-135 gsm, followed by its scouring, bleaching and relaxation treatments. The relaxed fabrics are then evaluated for dynamic moisture transport properties using the SDL Atlas moisture management tester. The moisture management test results indicate that blending polylactic acid fibres with cotton and bamboo-viscose fibres improves the blended fabric's moisture management properties. The overall moisture management capability value is found to be better for cotton/polylactic-acid/bamboo-viscose blended fabric in the proportion of 50/30/20. Page(s): 161-165 2022-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/60003 Title: Microstructure and particle filtration behavior of multimodal fibrous filter media made of fibres of different sizes for engine intake air filtration Authors: Yadav, Shivendra; Das, Dipayan Abstract: This paper reports a set of theoretical expressions for describing the microstructure of multimodal fibrous filter media comprising fibres of different cross-sectional sizes along with the application of such expressions to predict the filtration performance of clean and clogging media for engine intake air filtration. It is found that the overall filtration efficiency corresponds very well with the classical theory of air filtration after suitably modifying the single fibre efficiency and mean fibre diameter. The square of mean fibre diameter is found to be a weighted harmonic mean of the square of fibre diameter of individual component. The single fibre efficiency of multimodal filter media, when expressed as a summation of single fibre efficiencies of individual component of fibres weighted by the corresponding surface area fraction, correlates very well with the experimental results. The evolution of pressure drop is explained satisfactorily based on Berman’s approach after suitably modifying the Davies equation. Page(s): 166-176 2022-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/60002 Title: Comfort properties of moisture management finished bi-layer knitted fabrics: Part I - Thermal comfort Authors: Krithika, S M Udaya; Sampath, M B; Prakash, C; Kumar, M Senthil Abstract: Six samples of bi-layer knitted fabrics have been given the moisture management finish, with the formulation containing amino silicone polyether copolymer, along with the hydrophilic polymer and wetting agent in the ratio of 1:2 with pH 5.5 at 60o-70o C. It is found that the chemical combination of wetting and finishing agents, and the experimental conditions are proved to be the best possible options taken in this study. The fabrics are tested for various thermal comfort properties, such as air permeability, thermal conductivity, thermal resistance, and water vapour permeability. The bi-layer fabric structure along with the application of the optimized moisture management finish makes the fabric more suitable for sportswear, exhibiting good comfort properties, like water vapor permeability, air permeability, thermal resistance, thermal conductivity, and moisture management properties. The results of the air permeability, water vapour permeability, thermal conductivity and moisture management tests indicate that, the microdenier polyester (inner)- microdenier polyester (outer) fabric treated with suitable optimized moisture management agent shows better thermal comfort property, providing high levels of comfort. Hence, these fabrics are preferred during summer, active and sportswear. Page(s): 177-180 2022-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/60001 Title: Novel green printing of cotton, wool and polyester fabrics with natural madder dye nanoparticles Authors: Bakr, Mai M; Osman, Hanan; Taha, Mohammed A; Ibrahim, Hassan M Abstract: In this study, madder dye nanoparticles have been successfully prepared by using a simple ball milling technique. Madder dye nanoparticles are characterized by using UV-vis. absorption, XRD, TEM, FTIR spectroscopy and SEM. The prepared madder dye nanoparticles are used as an active ingredient for printing cotton, wool, and polyester fabrics via dye printing technique and pigment printing technique. Factors of printing process, such as substrates mordanting, thickeners type, urea concentration and pH of printing paste, urea concentration of first paste and binder concentration of second paste, are studied. Results show that fabrics printed with madder dye nanoparticles via mentioned two methods show very good to excellent fastness properties with a full green method. These data indicate that printed samples have high quality for colour strength without any environmental hazards as compared to other conventual and nanotechnological aspects. Page(s): 181-189 2022-06-01T00:00:00Z