Crystallinity change of silkworm variety cocoons by heat treatment
2
조회
0
다운로드
7
인용
0
참고문헌
키워드
초록
In the present study, the effect of heat treatment on the crystallinity of the outside of silkworm cocoon in nine different silkworm varieties was studied using ATR-FTIR spectroscopy. Additionally, the morphological structure and moisture regain of the cocoon were examined. The silkworm cocoon showed different colors and external features depending on the silkworm variety. Moreover, the thickness of the filament (15.3–27.6 μm) and moisture regain of the cocoon (9.0%–11.0%) were quite different depending on the silkworm variety. The crystallinity index of the cocoon outside varied from 52.1% to 56.1%, depending on the silkworm variety. J300 and MO42 showed the highest (56.1%) and the lowest (52.1%) crystallinity index, respectively, indicating that the microstructure of sericin of the outside of the cocoon was affected by the silkworm variety. Regardless of silkworm variety, their crystallinity indexes decreased from 52.1%–56.1% to 49.9%–43.6% depending on the silkworm variety by the heat treatment at 250 °C. Interestingly, the crystallinity degree decrease was somewhat different depending on the silkworm variety, implying that the cocoon sericin microstructure is strongly influenced by the silkworm variety.
Abstract
In the present study, the effect of heat treatment on the crystallinity of the outside of silkworm cocoon in nine different silkworm varieties was studied using ATR-FTIR spectroscopy. Additionally, the morphological structure and moisture regain of the cocoon were examined. The silkworm cocoon showed different colors and external features depending on the silkworm variety. Moreover, the thickness of the filament (15.3–27.6 μm) and moisture regain of the cocoon (9.0%–11.0%) were quite different depending on the silkworm variety. The crystallinity index of the cocoon outside varied from 52.1% to 56.1%, depending on the silkworm variety. J300 and MO42 showed the highest (56.1%) and the lowest (52.1%) crystallinity index, respectively, indicating that the microstructure of sericin of the outside of the cocoon was affected by the silkworm variety. Regardless of silkworm variety, their crystallinity indexes decreased from 52.1%–56.1% to 49.9%–43.6% depending on the silkworm variety by the heat treatment at 250 °C. Interestingly, the crystallinity degree decrease was somewhat different depending on the silkworm variety, implying that the cocoon sericin microstructure is strongly influenced by the silkworm variety.
참고문헌 (23)
- Arai T, "Biodegradation of Bombyx mori silk fibroin fibers and films", J Appl Polym Sci, 91, pp.2383~2390 (2004)
- Yu Jeong Bae, "Effect of addition of methanol on rheological properties of silk formic acid solution", International Journal of Industrial Entomology, 40(1), pp.28~32 (2020), 한국잠사학회
- Cho HJ, "Effect of molecular weight and storage time on the wet-and electro-spinning of regenerated silk fibroin", Polym Degrad Stabil, 97, pp.1060~1066 (2012)
- Hui Ju Choi, "Morphology, molecular conformation and moisture regain of cocoons of different silkworm varieties", International Journal of Industrial Entomology, 40(1), pp.1~15 (2020), 한국잠사학회
- Chung DE, "Effects of different Bombyx mori silkworm varieties on the structural characteristics and properties of silk", Int J Biol Macromol, 79, pp.943~951 (2015)
- Kim JH, "Alkali hydrolysis of insoluble sericin", Korean J Seric Sci, 42, pp.31~35 (2000)
- 김수진, "Effect of Silkworm Variety on Characteristics of Raw Sericin in Silk", Fibers and Polymers, 20(2), pp.271~279 (2019), 한국섬유공학회[DOI]
- Kim J, "Comparison of methods for the repair of acute tympanic membrane perforations: Silk patch vs. paper patch", Wound Rep Reg, 18, pp.132~138 (2010)
- Seong-Gon Kim, "Comparison of unprocessed silk cocoon and silk cocoon middle layer membranes for guided bone regeneration", Maxillofacial Plastic Reconstructive Surgery, 38(2), pp.1~8 (2016), 대한악안면성형재건외과학회[DOI]
- 이우영, "Effectiveness of Woven Silk Dressing Materials on Full-skin Thickness Burn Wounds in Rat Model", Maxillofacial Plastic Reconstructive Surgery, 36(6), pp.280~284 (2014), 대한악안면성형재건외과학회[DOI]
- Lee JH, "Effect of residual sericin on the structural characteristics and properties of regenerated silk films", Int J Biol Macromol, 89, pp.273~278 (2016)
- 이주한, "Characteristics of genes in carotenoid cocoon color, Bombyx mori L.", International Journal of Industrial Entomology, 35(2), pp.71~76 (2017), 한국잠사학회
- Lee JH, "Preparation of new natural silk non-woven fabric by using adhesion characteristics of sericin and their characterization", Int J Biol Macromol, 106, pp.39~47 (2018)
- Minoura N, "Attachment and growth of cultured fibroblast cells on silk protein matrices", J Biomed Mater Res, 29, pp.1215~1221 (1995)
- 박천진, "Effect of heat treatment on the structural characteristics and properties of silk sericin film", International Journal of Industrial Entomology, 37(2), pp.36~42 (2018), 한국잠사학회
- Park CJ, "Effect of molecular weight on the structure and mechanical properties of silk sericin gel, film and sponge", Int J Biol Macromol, 119, pp.821~832 (2018)
- Bo Kyung Park, "Molecular conformation and crystallinity of white colored silkworm cocoons with different silkworm varieties", International Journal of Industrial Entomology, 38(1), pp.18~23 (2019), 한국잠사학회
- 박보경, "Crystallinity of yellow colored silkworm variety cocoons", International Journal of Industrial Entomology, 38(2), pp.51~55 (2019), 한국잠사학회
- Sakabe H, "In vivo blood compatibility of regenerated silk fibroin", Sen’i Gakkaishi, 45, pp.487~490 (1989)
- Seok H, "Comparison of silkwormcocoon–derived silk membranes of two different thicknesses for guided bone regeneration", J Craniofac Surg, 25, pp.2066~2069 (2014)
- Um IC, "Structural characteristics and properties of the regenerated silk fibroin prepared from formic acid", Int J Biol Macromol, 29, pp.91~97 (2001)
- InChulUm, "Structural Characteristics and Properties of Silk Fibroin", Polyurethane Blend Films, 2002, pp.5(2), 163~170[DOI]
- Wang H, "Development and performance study of a natural silk fiber facial mask paper", J Eng Fiber Fabr, 15 (2020)