Journal of Sericultural and Entomological Science (한국잠사곤충학회지)

Korean Society of Sericultural Science (한국잠사학회)
권호 표지

Structural Characterization of Silk Fiber Treated with Calcium Nitrate

질산칼슘 처리 농도에 따른 수축견사의 구조특성

  • 이광길 (농촌진흥청 잠사곤충연구소) ;
  • 이용우 (농촌진흥청 잠사곤충연구소, 농촌진흥청 잠사곤충연구소, 서울대학교 농업생명과학대학)
  • Published : 1997.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

The IR crystallinity index of Calcium nitrate treated silk fiber decreased proportionally to the concentration of calcium nitrate. A partial change of conformation was observed in the concentration of over 46.4-47.6% changing from $\beta$-sheet or to random coil in the crystalline region. This is in coincidence with the result of crystallinity index, which was started to be reduced in the concentration range of 46.4-47.6%. A same trend was observed for the X-ray order factor, birefringence, degree of orientation and surface structure. These structural parameters were remarkably changed on the treatment of silk fibers with concentration of 46.4-17, 6% calcium nitrate. Therefore, it seems that there exists a critical concentration of calcium nitrate in affection the structure and morphology of silk fibers. According to the examination of surface morphology, the fine stripe was observed in the direction of fiber axis at 46.4% concentration. However, the treated concentration was exceeded by 47.6%, the cracks were appeared severely on the fiber surface in the transverse direction as well as fiber axis direction. This result might be related to the tensile properties, specially a tenacity of silk fibers. As a result of quantitative analysis of a dilute acid hydrolysis, three different regions, which are known as a amorphous, semi-crystalline and crystalline region, could be obtained. The hydrolysis rate curves were different with various concentrations of treatment and the relative contents of each region could be calculated.

Keywords

References

  1. J. Sericult. Sci. Japan v.56 no.4 Proposal of new model for silk I structure of Bombyx mori silk fibroin Askura, T.;Yamaguchi, T.
  2. Journal of Polymer Science, Polymer Chemistry Edition v.21 Investigation of the structure of silk film regenerated with Lithium Thiocyanate solution Bhat, N. 12Y.;Ahirrao, S. M.
  3. J. Appl. Polym. Sci . v.52 Chemical structure and physical properties of antheraea assama silk Freddi, G.;Cotoh, Y.;Mori, T.;Tsutsui, I.;Tsukada, M.
  4. 高分子化學 v.27 絹ダンパク質の高分子化學的硏究. (2) 家蠶?フイブロイン結晶部分模型の合成とみの構造 早川忠男;延藤慶之;山本靜護;野口順藏
  5. A background analysis, Journal of Applied Physics v.19 Quatantitative X-ray investigations on the crystallinity of cellulose fiber. Freddi, G.;Cotoh, Y.;Mori, T.;Tsutsui, I.;Tsukada, M.
  6. J. Sericult. Sci. Japan v.49 no.3 鹽縮した絹絲の力學的性質 平林 潔;荒井三雄;重松正矩
  7. SEN-1 Gakkaishi v.30 no.4 絹の鹽縮 平林 潔;鈴木孝雄;石川 博
  8. J. Sericult, Sci. Japan v.45 no.6 Thermal An alysis of Tussah silk fibroin Hirabayashi, K.;Tsukada, M.
  9. SEN-I Gakkaishi v.23 no.11 Studies on the fine structure of silk fibroin. (IV) Studies on the α-form of Bombyx silk fibroin 平林 潔;內由藤敏;石川 博;吳祐 吉
  10. 絹の微細組織とみの物性, 續絹絲の構組 石川 博
  11. 絹絲の率に關する硏究 (V) 絹纖維の結晶性, 配向性と 機械的 性質 v.10 石川 博;祖父江 實;松崎 啓
  12. SEN-I Gakkaishi v.28 DSC thermograms of silk fibroin Ishikawa, H.;Tsukada, M;Doizume, T.;Hirabayashi, K.
  13. J. Mol. Biol. v.61 The crystal structure of poly(LAla-Gly-Gly-Gly) II an poly(LAla-Gly-Gly) II Lotz, B.;Keith, H. D.
  14. Biochem. J. v.66 The amino acid sequence in fraction of the fibroin of Bombyx mori Lucas, F.;Shaw, J. T. B.;Smith, S. G.
  15. Protein Chem. v.13 Themoisture sorption of the silk of Bombyx mori in relation to the proportion and chemical composition of the crystalline and amorphous phase Lucas, F.;Smith, S. G.
  16. 高紛子論文集 v.31 no.12 絹フイブロインの轉移機構 馬越 淳
  17. J. Polym. Sci. Polym. Phys. Ed. v.17 Physical properties and structure of silk. (VI)Comformation changes in silk fibroin induces by immersion in water at 2 to 130℃ Magoshi, J.;Magoshi, Y.
  18. Journal of Applied Polymer Science v.21 Physical properties and structure of silk.(III) The glass transition and congormational change of Tussah silk fibroin Magoshi, J.;Magoshi, Y.;Nakamura, S.
  19. J. Polym. Sci. Polym. Phys. Ed. v.15 Physical properties and structure of silk (V) Thermal behavior of silk fibroin in the random-coil conformation Magoshi, J.;Magoshi, Y.;Nakamura, S.;Kasai, N.;Kakudo, M.
  20. J. Appl. Polym Sci. Japan v.19 Studies on physical properties and structure of silk. Glass transition and crystalliwation of silk fibroin Magoshi, J.;Nakamura, S.
  21. SEN-I Gakkaishi v.5 no.4 絹絲の物理化學的 硏究. (I)絹絲の結政領城量と物理的 性質との關係 村瀨良一
  22. Experimental method in polymer chemistry Rabek
  23. Biochem. Biophys. Acta. v.310 Studies on silk fibroin of Bombyx mori directily extracted from the silk gland Sasaki, T.;Noda, H.
  24. 蠶絲試報 v.10 no.7 フイブロン變性の中問形態と其絹絲形成過程に於ける意義に就て 淸水正德
  25. 工業化學雜誌 v.64 no.4 譴纖維の結晶性 祖父江. 寬;石川 博;宋崎 啓
  26. SEN-I Gakkaiashi v.41 no.7 Molecular conformation of Bombyx mori silk fibroin obtained by different casting comditions 塚田益裕
  27. J. Appl. Polym. Sci. v.44 Structure and physical properties of epoxide treated Tussah silk fibers Tsukada, M.;Gotoh, Y.;Freddi, G.;Matsumura, M.;Shiozaki, H.;Ishikawa, H.
  28. Journal of Applied Polymer Science v.51 Structural changes and dyeability of silk fibroin fiber following shrinkage in neutral salt solution Tsukada, M.;Kato, H.;Freddi, G.;Kasai, N.;Ishikawa, H.
  29. Biochem. Biophys. Acta. v.214 Dissociation of native fibroin sulfhydryl compound Tasiro, Y.;Otsuki, E.