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The Effect of Sulphuric Acid on Wool IV—Some Further Observations of the Reaction with Concentrated Acid

1960; Wiley; Volume: 76; Issue: 4 Linguagem: Inglês

10.1111/j.1478-4408.1960.tb02374.x

2056-5267

Richard L. Elliott, R. S. Asquith, M. E. P. Hopper, Daniel Rawson,

Dyeing and Modifying Textile Fibers

The following types of wool have been treated with concentrated sulphuric acid—virgin wool, dinitrophenylated wool, and deaminated wool. Subsequent analyses of the treated wools have shown clearly that the amino groups do not give covalent sulphamic acid derivatives, but that the aliphatic hydroxyl groups react rapidly to give sulphate esters. Serine and threonine analyses of treated wools after reaction with sulphuric acid support the theory that an O ‐peptidyl rearrangement occurs. The mechanism proposed for this rearrangement has been modified, and it is suggested that it proceeds through the aliphatic sulphate ester grouping primarily introduced into the wool.