http://nopr.niscpr.res.in/handle/123456789/60468 2026-10-09T16:46:19Z 2026-10-09T16:46:19Z Yadav, Shivendra Das, Dipayan http://nopr.niscpr.res.in/handle/123456789/60482 2022-09-05T09:31:23Z 2022-09-01T00:00:00Z

Title: Composite nonwoven filter media with hierarchically arranged fibres of different geometries for automotive engine intake air filtration Authors: Yadav, Shivendra; Das, Dipayan Abstract: This paper reports the development, characterization, and performance assessment of a series of promisingly designed nonwoven air filter media for automotive engine intake application. Commercially available fibres are processed through a laboratory-based needle-punched nonwoven line to prepare a plurality of composite nonwoven filter media with hierarchically arranged fibres of different sizes or shapes. The filter media are then assessed for their dynamic filtration performance both at cleaned and clogging states by employing testing devices based on gravimetric measurement and particle counting technologies. The composite nonwoven filter media with hierarchically arranged fibres of different geometries display excellent filtration performance and are found to be very promising for commercial engine application. As compared to their homogeneously-mixed counterparts, the composite nonwoven filter media offer higher gravimetric as well as fractional filtration efficiency, higher dust holding capacity, and more delayed rise of pressure drop. Page(s): 265-274

2022-09-01T00:00:00Z Pakolpakçıl, Ayben Draczyński, Zbigniew http://nopr.niscpr.res.in/handle/123456789/60481 2022-09-05T09:29:03Z 2022-09-01T00:00:00Z

Title: Production and characterization of polyurethane ultrafine fibre webs containing boric acid by electrospinning Authors: Pakolpakçıl, Ayben; Draczyński, Zbigniew Abstract: A novel material has been developed by electrospinning of thermoplastic polyurethane (TPU) ultrafine fibre webs containing boric acid (BA). The chemical characterization of the TPU/BA fibrous webs is determined by the energy dispersive spectrometer and the Fourier transform infrared spectroscopy. The morphologies and thermal properties of the webs obtained are investigated by scanning electron microscopy and the differential scanning calorimeter respectively. The electrospun fibrous webs’ air permeability performance and thickness are also measured. The morphologies of TPU fibrous webs change slightly by adding BA, and the fibre structures are maintained. The results obtained demonstrate that the electrospun TPU/BA fibrous webs may have a wide variety of potential applications in protective textiles and high-performance filters. Page(s): 275-280

2022-09-01T00:00:00Z Sahi, Ashutosh Kumar Singh, Mukesh Kumar Das, Apurba http://nopr.niscpr.res.in/handle/123456789/60480 2022-09-05T09:26:53Z 2022-09-01T00:00:00Z

Title: Effect of enzymatic process on characteristics of cottonized industrial hemp fibre Authors: Sahi, Ashutosh Kumar; Singh, Mukesh Kumar; Das, Apurba Abstract: This paper reports an investigation on the bacteria-based enzyme's cottonization of industrial hemp fibre. The industrial hemp fibres are enzyme processed to eliminate massive non-cellulosic portions from the fibre to enhance their fineness and softness. Box- Behnken response surface methodology is applied to optimize the effect of different concentrations, temperature and time by using enzymes on chemical and physical properties, like weight loss, average strength, length, chemical composition, and surface modification to simulate cotton feel touch. The results show that the pectin, lignin, hemicellulose, and other impurities are removed under the enzyme and alkali refining processes. The effect of the enzyme concentration, treatment time, and treatment temperature is found significant on weight loss, fibre diameter, crystallinity, cellulose, hemicelluloses content, and tenacity. The effluent load of the enzyme process by measuring COD is also found less than that of the alkali processing for industrial hemp fibre. Industrial hemp fibre can be a perfect model of the sustainability of fibre from the plant's inception into the entire life cycle, leading to the biodegradable product reducing less effluent load in an environment. Page(s): 281-289

2022-09-01T00:00:00Z Encan, B Cüreklibatır Marmaralı, A http://nopr.niscpr.res.in/handle/123456789/60479 2022-09-05T09:24:46Z 2022-09-01T00:00:00Z

Title: Effect of yarn type on performance of diabetic socks Authors: Encan, B Cüreklibatır; Marmaralı, A Abstract: In this study, seven different samples have been knitted in jersey and piquet structures using various antibacterial yarns. Cotton, polyamide, lyocell, polyester, acrylic, viscose and their blends have been used to prepare samples. Samples are tested for thermal conductivity, air permeability, water vapour permeability, coefficient of friction, abrasion resistance and recovery after compression. Acquired data are evaluated to determine the most appropriate type of yarn to be used for the diabetic socks. Test results show that antibacterial 100% polyester yarn is the optimum yarn for a diabetic sock among all the investigated yarns. This yarn has high air and water vapour permeability. It shows low coefficient of friction, high abrasion resistance, and high recovery rate after compression. Page(s): 290-295

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