界面活性剤の付着した絹繊維の熱劣化
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概要
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Silk plain fabric Habutae was immersed, for 4 days at room temperature, in the 0.3% solutions of Marseilles soap(MAS), sodium dodecylsulfate(SDS) and dodecylbenzenesulfonate(ABS), respectively. Dried fabric was then heated at 150℃ for 96 hr. The resulting specimens were investigated as to that the changes in mechanical,structural and surface properties have occurred by heat treatment. After heat treatment, the toughness of the specimen were reduced to 21-29% of their initial values. The decreasing rate of toughness of the specimen without surfactant was much more than that of the other specimens. The mechanical properties measured with the KES-FB fabric testing system allowed us to conclude that by heat treatment the values of shearing, compression and surface property changed remarkably, and that the changes in the surface property depended especially on the kinds of surfactant. The change in surface color by heat treatment with MAS adhered was the highest. The infra-red absorption spectrum measured by an attenuated total reflection(ATR) method revealed that the peptide-bonds of silk protein molecules were broken by the heat treatment. Addingly, the concentrations of ammonia extracted from the specimen released in the air for more than 2 weeks after heat treatment were measured by the ion meter. The result showed that the degradation of silk molecules seem to be clear. Although SDS and ABS reduced the degradations by heat treatment, the so-called "change in color by soap" was not directly related to the decrease in strength of silk fabric.
- 社団法人日本家政学会の論文
- 1992-02-15
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