DESCALING OF WOOL FIBERS BY THE TREATMENTS WITH VARIOUS ALCOHOLIC SOLUTIONS OF POTASSIUM HYDROXIDE

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  • 水酸化カリウムのアルコール溶液処理による羊毛繊維のスケール脱離
  • スイサンカ カリウム ノ アルコール ヨウエキ ショリ ニヨル ヨウモウ セン

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Description

Morphological changes produced on the surface structure of Merino wool fibers by severe treatments with various alcoholic solutions of KOH in undehydrated and dehydrated systems were studied mainly by electron microscopy.<br>In the undehydrated systems results obtained were summarized as follows:<br>For the case of n-butyl or n-amyl alcohol of many monovalent alcohols used in this experiment, interesting phenomena were observed on the fiber surface, where the damage was localized within the cuticle regions during the treatment for 1 hr at 50°C. After the treatment with a 6% ethylene glycol solution of KOH for 1 hr at 50°C, the fibers were coiled and the scales were slightly suffered. In the glycerol solution containing 6% KOH, the chemical attack to scales was much accelerated at the temperatures above 50°C.<br>For the dehydrated systems, n-propyl and n-butyl alcohol were tested as the solvents. During the treatment with an 8% n-propyl alcohol of KOH for 2 hr at 50°C, descaling occurred and followed by degradation of the cortex. On the contrary, in the dehydrated system of n-butyl alcohol, descaled fibers were obtained for prolonged treatment without giving any perceptible damage to the cortical segments. The time of treatment required for descaling was of 17 hr and 40 hr with and without a mild agitation, respectively.

Journal

  • Sen'i Gakkaishi

    Sen'i Gakkaishi 31 (9), T448-T451, 1975

    The Society of Fiber Science and Technology, Japan

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