http://nopr.niscpr.res.in/handle/123456789/48242 2026-10-10T02:43:50Z http://nopr.niscpr.res.in/handle/123456789/48260 Title: Application of newly developed fibre orientation measurement techniques for needle-punched nonwoven Authors: Roy, Rupayan; Ishtiaque, S M Abstract: New structural characteristics based on tracer fibre and Lindsley’s techniques to measure the fibre orientation in X, Y and Z directions of needle-punched nonwoven have been investigated. The results are verified with variable cylinder speed, punch density and needle depth penetration. It is evident that measured structural characteristics and fabric tensile strength show very good correlation in machine direction but poor correlation in cross-direction. Page(s): 131-140 2019-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/48259 Title: Comparison of different synthesis methods for immobilization of magnetite nanoparticles on hydrolysed polyester fabric Authors: Mirjalili, Mohammad Abstract: Attempts have been made to accomplish synthesis of magnetite nanoparticles and hydrolysis of polyester fabric in one step. Polyester fabrics are treated in a bath containing ferrous chloride, ferric chloride and sodium hydroxide under three different conditions, namely stirring, ultrasound and high temperature. The successful synthesis of Fe₃O₄ particles with different shapes on the surface of the polyester fabrics is confirmed by scanning electron microscopy, X-ray diffraction and energy dispersive X-ray spectroscopy. The treated fabrics are assessed for magnetic, antibacterial and Fenton catalytic properties. In addition, bending length and water drop absorption time of treated samples are also evaluated. The results show that magnetic, antibacterial and Fenton catalytic activities are superior for samples treated under ultrasound condition than the samples treated under stirring or high temperature conditions. Nevertheless, the hydrophilicity and flexibility of the treated polyester fabrics under various conditions are improved. Page(s): 141-147 2019-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/48258 Title: Effect of fibre composition on essential properties of needle-punched nonwoven fabrics as secondary layer for composite wound dressings Authors: Sasikala, L; Rathinamoorthy, R; Durai, Bhaarathi Abstract: Suitability of viscose, bamboo, cotton and polyester fibres as a secondary layer for wound dressing application has been analysed. The needle-punched nonwovens of the selected fibres in seven different combinations, namely 100% viscose, 70/30 viscose/bamboo, 70/30 viscose/cotton, 70/30 viscose/polyester, 30/70 viscose/bamboo, 30/70 viscose/cotton and 30/70 viscose/polyester have been used for the study. These nonwovens are compared for their properties like mass per unit area, thickness, air permeability, tensile strength, elongation, water vapor transmission rate, rate of absorption, absorbency, vertical wicking, dehydration rate, and antibacterial efficacy against <em>S.aureus </em>and <em>E.coli</em>. From the obtained results, based on the importance of wound dressing characteristics, 70/30 viscose/bamboo needle-punched nonwoven is found to be more useful as a secondary layer for wound dressing. The dressings maintain the suitable moisture conditions around the wound surface, preventing the desiccation. The usage of developed nonwovens aids in rapid uptake and retention of wound fluid, which creates an optimum environment for rapid healing and inhibition of bacterial growth. Page(s): 148-154 2019-06-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/48257 Title: Effect of compatibilizer on mechanical properties of chemically treated coir/polypropylene composite Authors: Galav, Lekhraj; Mukhopadhyay, Samrat; Deopura, B L Abstract: Composites of NaOH treated coir fibre and maleic anhydride functionalized polypropylene (MAHPP) with different formulations have been made by compression molding technique and the effect of compatibiliser on mechanical strength, flexural strength, and impact properties of the composites are measured and then compared with theoretically calculated values. It is observed that the tensile strength, tensile modulus, Izod impact strength and flexural strength of surface treated and MAPP coupling composite properties are enhanced significantly than the untreated one. This is due to better adhesion between fibre and matrix. This is also confirmed by SEM, interfacial shear strength or fibre pull-out tests and trans crystalline behavior of the composites constituents in the melt form. Page(s): 155-162 2019-06-01T00:00:00Z