습윤처리 및 열압착처리가 기계적으로 제작된 천연 실크 부직포의 구조 및 성질에 주는 영향 = Effects of Wet and Hot Press Treatments on Structure and Properties of Mechanically Fabricated Natural Silk Non-woven Fabrics

다국어 초록 (Multilingual Abstract)

This study investigates the effects of wet and hot press treatments on the structure and mechanical properties of natural silk non-woven fabric under two post-treatment conditions: (a) hot press without wet treatment and (b) hot press with wet treatment. With respect to the fabric structure, a hot press without wet treatment does not alter the arrangement of silk filaments, while a hot press with wet treatment causes wrinkles in the fabric, and further bending of the silk filaments as the temperature is increased. With respect to the fabric mechanical properties, there is no improvement observed in the first condition, while the tensile strength of the fabric remarkably increases in the second condition when the hot press temperature is increased up to $200^{\circ}C$, indicating the crucial swelling of sericin by wet treatment to bind silk filaments. However, at a hot press temperature reaching $230^{\circ}C$, tensile strength decreases due to the molecular degradation of sericin. Moreover, hot press significantly decreases the porosity of the natural silk non-woven fabric with the wet treatment further accelerating the effect.

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