Dyeing of Polyester Fabric using Nano Disperse Dyes and Improving their Light Fastness using ZnO Nano Powder

Hamada M Mashaly

doi:10.17485/ijst/2014/v7i7.11

Abstract

In this work a Disperse red 60 and Disperse blue 56 were converted to the nano scale using ultrasonic homogenizer and characterized by transmission electron microscopy. Dyeing of polyester fabrics was carried out in the temperature range of 70-100oC and compared with the polyester fabrics dyed with the same dyes without sonication. Dyeing was carried out using two different carriers: salicylic acid and HC carrier. ZnO nano powder was used to improve the light fastness for the dyed polyester fabrics.

Highlights

Polyester fiber has a highly compact and crystalline structure, and is markedly hydrophobic
Solvent-assisted and carrier dyeing has been widely studied as a means of accelerating dyeing rate, improving dye uptake and lowering dyeing temperature by means of changes in the physical properties of polyester, notably such as Glass transition Temperature (Tg)
For the dye molecules to diffuse into the fabric, it is expected that the free volume could be formed within the fabric

Summary

Introduction

Polyester fiber has a highly compact and crystalline structure, and is markedly hydrophobic For this reason, its aqueous dyeing is carried out at high temperature and high pressure using disperse dyes. Solvent-assisted and carrier dyeing has been widely studied as a means of accelerating dyeing rate, improving dye uptake and lowering dyeing temperature by means of changes in the physical properties of polyester, notably such as Glass transition Temperature (Tg). Both solvents and carriers have serious problems, namely toxicity and unpleasant odor, poor light fastness, an adverse effect on the physical properties of the fiber, high costs of waste water treatment and environmental contamination and destruction. It seems sensible that efforts should be devoted toward the development of a new dyeing method to accelerate dyeing rate, improve dye uptake and lower dyeing temperature[1]

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