The Effect of Coagulant and Molecular Weight on the Wet Spinnability of Regenerated Silk Fibroin solution
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The regenerated silk fibroin with various molecular weights (MW) was prepared by different dissolution condition and the effect of coagulant on the wet spinnability of the various MW silk fibroin solutions dissolved in formic acid was investigated by the observation of wet spun filament in coagulant and the measurement of maximum draw ratio. The observation on the wet spun filament in coagulation bath revealed that good fibers without bead were formed in a high MW and a very high MW silk fibroin samples. In contrast, beads were observed in the silk fibroin sample with medium MW. The maximum draw ratio of wet spun silk fibroin filament decreased with MW reduction. The decrease of maximum draw ratio in isopropanol,acetone, DMF and THF was remarkably higher than that in methanol and ethanol, indicating that the coagulant type strongly influenced the wet spinnability. The two simple evaluation methods used in this study showed complementary information for wet spinnability: (a) The observation of filament in coagulant was effective to check a continuous fiber formation and a bead formation, and (b) the maximum draw ratio measurement was useful to examine the post drawing ability related to molecular orientation.
Abstract
The regenerated silk fibroin with various molecular weights (MW) was prepared by different dissolution condition and the effect of coagulant on the wet spinnability of the various MW silk fibroin solutions dissolved in formic acid was investigated by the observation of wet spun filament in coagulant and the measurement of maximum draw ratio. The observation on the wet spun filament in coagulation bath revealed that good fibers without bead were formed in a high MW and a very high MW silk fibroin samples. In contrast, beads were observed in the silk fibroin sample with medium MW. The maximum draw ratio of wet spun silk fibroin filament decreased with MW reduction. The decrease of maximum draw ratio in isopropanol,acetone, DMF and THF was remarkably higher than that in methanol and ethanol, indicating that the coagulant type strongly influenced the wet spinnability. The two simple evaluation methods used in this study showed complementary information for wet spinnability: (a) The observation of filament in coagulant was effective to check a continuous fiber formation and a bead formation, and (b) the maximum draw ratio measurement was useful to examine the post drawing ability related to molecular orientation.
참고문헌 (11)
- Ha SW, "Structural studies of Bombyx mori silk fibroin during regeneration from solutions and wet fiber spinning", Biomacromolecules, 6, pp.1722~1731 (2005)
- Ki CS, "The effect of residual silk sericin on the structure and mechanical property of regenerated silk filament", Int J Biol Macromol, 41, pp.346~353 (2007)
- Lee KH, "Preparation and characterization of wet spun silk fibroin", poly(vinyl alcohol) blend filaments, 2007, pp.41, 168~172
- Marsano E, "Regenerated cellulose-silk fibroin blends fibers", Int J Biol Macromol, 43, pp.106~114 (2008)
- Mathur AB, "The dissolution and characterization of Bombyx mori silk fibroin in calcium nitrate methanol solution and the regeneration of films", Biopolymers, 42, pp.61~74 (1997)
- 오한진, "LiCl", DMSO를 이용한 PVA와 세리신 블렌드 섬유의 제조, 2008, pp.45(1), 1~5[DOI]
- Trabbic KA, "Comparative structural characterization of naturally- and synthetically-spun fibers of Bombyx mori fibroin", Macromolecules, 31, pp.462~471 (1998)
- In Chul Um, "The Effect of Coagulant on the Post Drawing and Morphology of Wet Spun Regenerated SF", Nylon 6 Blend Filaments, 2008, pp.16(2), 61~66[DOI]
- Um IC, "Effect of storage time on the wet-spinning and electro-spinning of various molecular weight silk formic acid solutions", 239th ACS national meeting (2010)
- Um IC, "Wet spinning of silk polymer: I. Effect of coagulation conditions on the morphological feature of filament", Int J Biol Macromol, 34, pp.89~105 (2004)
- Um IC, "Wet spinning of silk polymer: II. Effect of drawing on the structural characteristics and properties of filament", Int J Biol Macromol, 34, pp.107~119 (2004)