열처리에 따른 누에품종별 누에고치의 황변 정도와 결정성 변화 = Change of Yellowing and Crystallinity of Silkworm Variety Cocoons by Heat Treatment

다국어 초록 (Multilingual Abstract)

Silk has been extensively studied as a promising material for biomedical and cosmeticapplications due to its excellent biocompatibility, cytocompatibility, biodegradability,among other unique properties. In addition to these properties, the natural silknonwoven fabric has attracted attention from researchers in bio-related fields due to itsease of fabrication. The natural silk nonwoven fabric is prepared by reeling silkwormcocoons and subjecting them to heat treatment. In this study, various silkworm varietycocoons were wet- and heat-treated and then, their whiteness index and crystallinity indexwere measured to gain a better understanding of structural characteristics of cocoons. Thewhiteness index was significantly reduced above 200 °C and the extent of reduction variedslightly depending on the silkworm variety. Wet treatment of the silkworm cocoons preventedslightly the decrease in the whiteness index of cocoons. The crystallinity index ofcocoon was different depending on the silkworm variety and Baekokjam cocoon showedthe highest crystallinity index. Outside of cocoon showed a remarkable decrease of crystallinityindex above a treatment temperature of 200 °C. However, the crystallinity index ofoutside of cocoon did not decrease when the wet treatment was conducted prior to heattreatment. On the other hand, the crystallinity index of inside of cocoon increased above200 °C regardless of wet treatment.

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