The degradation of wool keratin under conditions relevant to those of
wool dyeing was investigated using the techniques of gel permeation chromatography
(GPC), ion exchange gel chromatography, and amino acid analysis.
Physical testing of the treated and untreated wool was also carried out to
determine the physical changes occurring, parameters used being percentage
elongation at the break, and the breaking strain of the fibre.
Samples of wool keratin were immersed in various aqueous solutions at
1000C for 24 hours and the filtered, aqueous, oxidised extracts were analysed*
The solutions used varied only in the dye, or dye intermediate present in the treatment
solution. All treatment baths contained
10% owf 1.02 x 10
-2 MSulphuric VI acid;
10%owf 7.04x 10
-3 MSodium sulphate VI ;
A 100 :1 liquor ratio was used in each case.
Some of the dye intermediates showed a marked catalytic effect, particularly
in their effect on breaking strain, a decrease of 40% in some cases.
The GPC profiles of the extracted proteins were examined in detail and
compared against previous workers' results.
An explanation of the behaviour of the dyes and intermediates was proposed.
The amino acid composition data of the extracted and fractionated proteins were
compared against various morphological components extracted by other workers,
as was the total gelatin obtained from each treatment. / Science Research Council
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/4199 |
| Date | January 1981 |
| Creators | McComish, John |
| Contributors | Burdett, B. C. |
| Publisher | University of Bradford, Postgraduate School of Studies in Colour Chemistry and Colour Technology. |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Thesis, doctoral, PhD |
| Rights | <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>. |
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