Concerns related to the fi eld of application of

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concerns related to the fi eld of application of nanotechnology in textiles. The chapter focuses on the advantages of the newer methods of nanotextile fi nishing which hold the prospects of wider areas of applications. 2 Treatment of Nanomaterials on Garments for Special Needs 2.1 Overview The mechanical and physical properties of cotton fabrics can be modi fi ed to meet special needs garments, by application of nanosilver fi nishes. Accordingly fabrics have been subjected to the nanosilver fi nishing process with 5 different solution concentrations of 100, 200, 300, 400 and 500 ppm. It has been found that nanosilver fi nishing minimized the air and water vapour permeability of the fabric, which could be due to the nanosilver particles that fi ll the fabric pores. The wrinkle recovery angle of the nano fi nished fabrics has decreased in both directions due to the generation of links on the fabric by nanosilver particles (Ebrahim and Mansour 2013 ). Yarn swelling phenomena happens during the fi nishing process in cotton fabrics which means increment of occupied space by fi bres and yarns and thus rise in the fabric thickness; owing to integration of fi bres and yarns by the nanosilver particles, the breaking elongations of fabrics in both warp and weft directions were inclined to applying the nanosilver fi nishing process, and applying the nanosilver fi nishing process led to formation of links on the fabric, and con- sequently bending rigidity of the fabrics was increased in both warp and weft directions. Finally, it has been observed that there has been a decrease in most of the physical and chemical properties of cotton fabrics by increasing the concentration of the solution to 500 ppm. Advances in Nanotextile Finishes An Approach Towards Sustainability 3
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2.2 Related Aspects Despite the fact that the application of nanoparticles to textile materials is gaining popularity owing to their novel physicochemical properties and their potential applications, some of them are toxic or ineffective and renders them unsuitable for applications in medicine, fi lters, and textiles and for the exclusion of pollution. To quote some examples (a) Improving the water-repellent property of the fabric by creating nanowhiskers (hydrocarbons which are 1/1000 size of typical cotton fi bres) on the fabric (b) Creating antistatic properties of textile which can be provided by TiO 2 , ZnO, antimony-doped tin oxide (ATO), and silane nanosol, increasing the surface energy and thereby providing a very high particle retention to fi lters by the usage of nano fi brous webs on them (c) Using nanotitanium dioxide and nanosilica to advance the wrinkle resistance of cotton and silk respectively, employing nanosized TiO 2 and ZnO in order to absorb and scatter UV radiation more effectively regarding the larger surface area and blocking ability of so-called particles (d) Covering the cotton fi bres in a fuzz of minute whiskers and creating fewer points of contact of dirt, thus the fabric has been rendered super-hydrophobic, and the self-cleaning property can be developed in this way.
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  • Fall '19
  • N. Gokarneshan

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