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KMID : 0381920100400030163
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Korean Journal of Microscopy
2010 Volume.40 No. 3 p.163 ~ p.168
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Thermal Analysis of the Straight Permed Hair
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Rho Jung-Ae
Lee Gui-Young
Chang Byung-Soo
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Abstract
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We investigated the burning process of the virgin hair and straight permed hair using thermal analyser and scanning electron microscopy. After the thermal analysis, we found that weight started to change from 100?C. Whereas straight permed hair has weight decrease rate of 2.6% higher than the virgin hair till 200?C, those were 64.9% and 64.4% for the virgin and straight permed hairs, respectively at 300?C. At 400?C, the weight decrease rate of the virgin hair became lower than the other; they were 32.3% and 33.4% for the virgin and straight permed hairs, respectively. Final values were 25.4% and 28.3% at 500?C, which showed that final weight of burnt straight permed hair was higher than the virgin hair by about 2.9%. In terms of morphological changes, the hair started to melt together with adjacent ones by burning till 300?C. The medulla and cortex were melt and the inside was empty like bamboo. The hair burnt till 500?C was entirely carbonized and found as a clod. We found many blowholes at the surface of the hair clump.
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KEYWORD
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Cuticle, Cortex, Straight permed hair, Scanning electron microscope, Thermal analysis
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