Measurement of Damage in Wool Materials IV—A Modification of the Krais‐Markert‐Viertel (K.M.V.) Test— The Supercontraction of Keratin Fibres in Solutions of Caustic Potash

Reduced keratin fibers when heated in 8 M LiBr solution at 100° C first contract and then lengthen. Reduced and methylated Corriedale wool fibers contract but do not lengthen under the same conditions. Reduced fibers that have been abraded to remove cuticle lengthen less than unabraded fibers. Mechanical, x-ray, and birefringence evi dence show that fibers that have increased to about their natural length are severely degraded and not elastomeric. In general the amount of elongation increases with increasing severity of the reducing treatment. It is suggested that elongation results primarily from a swelling pressure within the fiber produced by dissolution of protein.

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Measurement of Damage in Wool Materials IV—A Modification of the Krais‐Markert‐Viertel (K.M.V.) Test— The Supercontraction of Keratin Fibres in Solutions of Caustic Potash

Abstract: Dimensional changes of wool fibres when immersed in 20% caustic potash solution are studied and data are given showing the effects of various chemical pretreatments on the supercontraction and the time of recovery from supercontraction.

Cited by 2 publications

References 1 publication

Permanent Set, Supercontraction, and Urea-Bisulphite Solubility–the Proton-Transfer Nature of some Changes in Keratin and the Analogy with Muscle Contraction

Permanent Set, Supercontraction, and Urea-Bisulphite Solubility–the Proton-Transfer Nature of some Changes in Keratin and the Analogy with Muscle Contraction

Supercontraction and Elongation of Modified Keratin Fibers in LiBr Solution

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