Chemical modification of nylon 6 and polyester fabrics by ozone‐gas treatment

Abstract

ABSTRACT:In a previous article, we reported on the ozone-gas treatment of wool and silk fabrics in relation to the gas-phase processing of textile fabrics. The treatment incorporated an oxygen element into the fiber surface and contributed to an increase in water penetration into the fabric. In this study, nylon 6 and polyester fabrics were treated with ozone gas in the same way as that of the wool and silk fabrics. The treatment incorporated much more oxygen into the fiber surface in the form of OCOH and OCOOH, as shown by electron spectroscopy for chemical analysis. Water penetration increased considerably with treatment, and the apparent dyeing rate and equilibrium dye uptake were also improved, especially for the polyester fabric, despite an increase in the crystallinity. Therefore, it seemed that the treatment brought about a change not only in the fiber surface but also in the internal structure of the fibers (the crystalline and amorphous regions) with regard to the dyeing behavior. Further, the mechanical characteristics of the ozone-gas-treated polyester and nylon 6 fabrics were measured with a Kawabata evaluation system apparatus. The shearing modulus and hysteresis widths increased with treatment, especially for the polyester fabric. Therefore, it was clear that the treatment caused a change in the fabric hand to crisp.

Effect of nanoclay type on dyeability of polyethylene terephthalate/clay nanocomposites

“…Researchers are concerned with the development and implementation of new techniques in order to fulfill improvement in dyeability of polyester. For this purpose, many great studies have been carried out including: physical methods (corona discharge, plasma, ozone‐gas, gamma, and microwave functionalizations)26–36; chemical methods (enzymatic modification treatment with different reagents, grafting of different monomers, dyeing in supercritical carbon dioxide, and micro‐encapsulation techniques),37–49 and blending of PET with different compounds in fiber production to enhance dyeability 50–57. However, some of these methods often damage the otherwise excellent mechanical and bulk properties of PET fibers and make stable production thereof difficult.…”

Surface and Bulk Modification of Synthetic Textiles to Improve Dyeability

“…7. Peroxides generated after different ozonation times in different media (Gu et al, 2009) Specific to fabrics, chemical modification via gas-phase ozone treatment was performed on nylon 6 taffeta, polyester taffetas (Lee et al, 2006), cationic dyeable polyester (CDP) and poly(butylene terephthalate) fibers (Lee et al, 2006. The surface analysis via ESCA was very comparable to the plasma studies by others (Fujimoto et al, 1993), the reader is referred to previous methods for process conditions .…”

Surface modification and preparation techniques for textile materials

“…22 been reported. 27,28 Lee et al 29 investigated the ozone gas treatment of nylon 6 and polyester fabrics. The treatment incorporated much more oxygen into the fibre surface in the form of -OCOH and -OCOOH as shown by XPS.…”