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The Effect of Sulphuric Acid on Wool
Author(s) -
Elliott R. L.,
Asquith R. S.,
Rawson D. H.
Publication year - 1958
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1958.tb02249.x
Subject(s) - dissolution , chemistry , wool , hydrolysis , sulfur , amide , nitrogen , organic chemistry , materials science , composite material
The attack of sulphuric acid of various concentrations on wool has been examined under different conditions of temperature and time of treatment. The damaged fibres have been observed microscopically, and results correlated with weight changes and amide‐nitrogen analyses. The attack has been shown to be of the following main types—1 Hydrolysis in concentrations of acid up to 44% concentrated sulphuric acid by weight. 2 Rapid dissolution in concentrations of acid between 44% and 81‐3%, the histological attack being different from the simple hydrolytic attack in (1). 3 A slow attack, at concentrations between 93% and 98%, which becomes considerably more rapid at temperatures above 60%. 4 A rapid oxidative attack and dissolution, presumably due to free sulphur trioxide, in acid concentrations above 98%.At. higher temperatures, all types of attack are more rapid.