http://nopr.niscpr.res.in/handle/123456789/62085 2026-10-09T10:45:01Z http://nopr.niscpr.res.in/handle/123456789/62101 Title: A facile approach for isolation of cellulose nanocrystals from banana fibres Authors: Singh, Umarav; Gupta, M K; Singh, Harinder Abstract: Nanocellulose, in form of cellulose nanocrystals (CNC-B) from banana fibres, has been isolated through steam explosion followed by chemical treatments and mechanical grinding. The nano size of isolated particles is confirmed by dynamic light scattering and transmission electron microscopy analysis and an aspect ratio up to 9.80 is reported. The improvement in crystallinity and removal of amorphous constituents are confirmed by X-ray diffraction and Fourier transform infrared analysis respectively. It is interesting to report that the present CNC-B is unable to show an antibacterial property, which might be due to complete removal of lignin. Page(s): 109-116 2023-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/62100 Title: Polyacrylonitrile and polylactic acid blend nanofibre spinning using needleless electrospinning technique Authors: Sahoo, Rudrapratap; Dash, Bibhu Prasad; Panda, Prasanta Kumar Abstract: In this work, polyacrylonitrile (PAN) and polylactic acid (PLA) blended polymers have been used to prepare a flexible and partially biodegradable electrospun nanofibre sheet suitable for filtration application. Also, acetone has been used as a replacement of dimethyl formamide (DMF) during spinning and a needleless (wire electrode) electrospinning machine has been used for filament preparation. Initially, PAN fibre is spun with DMF and various parameters, such as polymer concentration, voltage, distance between electrodes and RH%, are standardised. With these standard parameters, PLA is then added with PAN, and PLA concentration is optimised without affecting the desired fibre diameter. Further, the amount of acetone with DMF is also standardised without affecting the fibre diameter. Finally, polymer concentration of 2.5% PAN with 0.5% of PLA, a potential difference of 55 kV, electrode distance of 125mm at 35% RH and 10% acetone are found suitable for getting the desired nanofibre with minimum diameter. Page(s): 117-123 2023-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/62099 Title: Development of two novel methods using sensors to operate the industrial overlock machine for loco-motor disabled person Authors: Suresh, S S; Raja, D Abstract: In this research, two sensor-based methods have been developed to operate industrial over-lock sewing machine,especially for loco-motor disabled person. Generally, the over-lock sewing machine is operated using foot pedal and this sensor based method eliminates the foot pedal and use alternative ways to sew garment. The method-1 uses a flextouch sensor and method-2 uses a textile sensor integrated wearable hand glove to operate the over-lock sewing machine.The seam efficiency of over-lock stitches performed using both the methods (1 & 2) has been assessed and compared with that of normal foot pedal method. Avariety of woven and knitted garments are sewed by implementing both the methods, and results are evaluated to calibrate and standardize the sensors/methods toencourage loco-motor disabled persons as self-employed sewing operators. Page(s): 124-131 2023-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/62098 Title: Computer geometric modeling approach with filament assembly model for 2×2 twill woven fabrics structures Authors: Patumchat, Puttipong; Sriprateep, Keartisak Abstract: A new computer geometric modeling approach for 2×2 twill woven fabrics structures has been presented. A 3D model considering their inherent skewness is proposed and can be used in precise geometrical description. Balanced fabric geometry occurs in 2×2 twill weaves where the fabrics are defined by floating and intersecting segments in weaves, which create symmetric floatings on the front and back surfaces of the fabrics. The yarns cross-section of twill woven fabrics uses the concept of virtual locations and each cross-section is rotated along a single yarn path. The curve of each filament in each of two successive cross-sections is approximated by NURBS. The approach described is demonstrated in 3D CAD for twill woven fabrics structures by using the geometric parameters considering their inherent skewness. The simulated twill woven fabrics structures must be improved so that they are a true visual simulation of real twill woven fabrics and can demonstrate wide varieties of form. Page(s): 132-140 2023-06-01T00:00:00Z