Search:
Computing and Library Services - delivering an inspiring information environment

Dyeing Behaviour of Lyocell Fabric: Effect of NaOH pre-treatment

Goswami, Parikshit, Blackburn, Richard S., Taylor, Jim and White, Patrick (2009) Dyeing Behaviour of Lyocell Fabric: Effect of NaOH pre-treatment. Cellulose, 16 (3). pp. 481-489. ISSN 0969-0239

Metadata only available from this repository.

Abstract

To understand the effect of alkali pre-treatment on the dyeing of lyocell fabrics, samples are pre-treated with 0.0–7.0 mol dm−3 NaOH using a pad-batch process and then dyed with different types of reactive dyes. Exhaustion, fixation, and visual colour strength (K/S values) are measured. It is observed that sodium hydroxide pre-treatment significantly improves the colour yield, exhaustion, and fixation for all dyes used. Highest K/S values are obtained when the fabrics are pre-treated with 2.0–2.5 mol dm−3 NaOH. Cross-sectional analysis shows that below this optimum concentration the core fibres in the yarn are not dyed; at optimum concentration all fibres in yarn cross-section are homogeneously dyed. Cross-sectional analysis shows that as the pre-treatment concentration of NaOH increases above 2.5 mol dm−3, the fibres change progressively from a circular to angular cross-section, forming a solid unit. The decrease in K/S above the treatment concentration of 2.5 mol dm−3, though the %E and %F remains almost constant, is attributed to the distribution of dye over a larger surface area of the outer fibres in the yarn cross section, forcing the K/S at λmax to decrease.

Item Type: Article
Uncontrolled Keywords: Regenerated cellulose; Cellulose II; Sodium Hydroxide; Swelling; Reactive dyes; Diffusion; Morphology
Subjects: Q Science > QD Chemistry
Q Science > QH Natural history > QH301 Biology
Schools: School of Art, Design and Architecture
Related URLs:
Depositing User: Jonathan Cook
Date Deposited: 07 Sep 2017 07:41
Last Modified: 07 Sep 2017 09:51
URI: http://eprints.hud.ac.uk/id/eprint/33144

Downloads

Downloads per month over past year

Repository Staff Only: item control page

View Item View Item

University of Huddersfield, Queensgate, Huddersfield, HD1 3DH Copyright and Disclaimer All rights reserved ©