Development of Evaluation Method for Surface Damage of Wool Fibers

研究了损伤类型和损伤程度对角蛋白纤维表面特性变化的影响。然后，我们研究了表面特征的变化与沿受损角蛋白纤维的水运输行为之间的关系。为此，对人发纤维的破坏有两种方式：一种是用DCCA试剂对头发进行氯化处理，另一种是物理处理，即用砂纸摩擦头发纤维。我们用每种方法制备了几种不同程度损伤的样品。利用光镜和扫描电镜（SEM）对损伤纤维的表面形貌进行了检测，并利用氨基酸分析对纤维表面的化学结构进行了评价。我们证实，表面表征结果反映了损伤的类型和程度。通过使用wilhelmy型仪器测量单个纤维样品的润湿力来评估受损纤维的接触角（rheta）值。损伤纤维的rheta平均值随损伤程度的增加而减小。我们利用我们报道的电容技术研究了水沿各种受损人类头发纤维的输运行为(2)。结果表明，水分沿纤维束的输送速率受角蛋白纤维损伤类型和程度的影响较大。

The effect of the damage type and the damage level on the canges in surface characteristics of keratin fibers was studied. Then, we investigated the relationships between the change in surface characteristics and that in water transport behavior along damaged keratin fibers. For this purpose, human hair fibers were damaged by two means : chlorination of the hair with DCCA reagent, and physical treatment, namely, rubbing the fibers with sandpaper. We prepared several samples differing in the level of damage by each method. Surface morphology of damaged fibers were examined by light and scanning electron microscopy (LM and SEM), and chemical structures of the surfaces were evaluated by amino acid analysis. We confirmed that the surface characterization results reflect the type and level of damoges. Contact angle (rheta) values were evaluated for damaged fibers by measuring the wetting force of a single fiber sample using the Wilhelmy-type apparatus. The averaged values of rheta for damaged fibers decreased upon the degree of damage. We investigated the water transport behavior along variously damaged human hair fibers using the electrical capacitance technique which has been reported by us (2). The results show that the rate of water trasport along fiber bundle was strongly influenced by the type and level of damage to keratin fibers.