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Frequency dependence of ultrasonic wool scouring

Version 2 2024-06-04, 11:01
Version 1 2014-10-28, 09:15
journal contribution
posted on 2024-06-04, 11:01 authored by Q Li, Christopher HurrenChristopher Hurren, L Wang, T Lin, H Yu, C Ding, X Wang
Conventional aqueous scouring of greasy wool promotes wool felting and can be energy and water intensive. Ultrasonic wool scouring could be an alternative technology to minimise the negative impact, provided that the cleaning efficiency and fibre quality are not compromised. This study  examined the influence of ultrasonic irradiation frequency and ultrasonic power variations on wool scouring performance at different liquor ratios. Scoured fibre, residual ash content, residual grease content, whiteness and yellowness were evaluated. The impact of liquor degassing on wool scouring effectiveness was studied. Fibre surface damage was also assessed in this work. It was observed that while there was no significant influence of ultrasonic frequency on the whiteness or yellowness of the scoured fibres, wool scoured at frequencies of 28 kHz and 80 kHz had more grease and dirt removed than that scoured at 45 kHz. Low ultrasonic power and degassed bath liquor increased wool grease removal ability. Ultrasonic treatment caused scale cracking/peeling in some wool fibres. More severe cuticle damage was observed in fibres scoured at the lower frequency. This damage resulted in increased dye uptake by the fibres.

History

Journal

Journal of The Textile Institute

Volume

102

Pagination

505-513

Location

Manchester, England

ISSN

0040-5000

eISSN

1754-2340

Language

eng

Notes

First published on 15 February 2011

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2011, Taylor & Francis

Issue

6

Publisher

Taylor & Francis