Studies on regenerated protein fibers. III. Production of regenerated silk fibroin fiber by the self-dialyzing wet spinning method
✍ Scribed by Kiyoichi Matsumoto; Hiroyuki Uejima; Tatsuo Iwasaki; Yoshiyuki Sano; Hiroshi Sumino
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 958 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
✦ Synopsis
The spinnable dope containing 20 wt % of silk fibroin dissolved in the MU solvent (e.g., LiBr * H 2 0 = 40 wt %, and EtOH : H20 = 100 : 0 in volume) was spun into a coagulant and subsequently drawn, to give the following results.
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Methanol, ethanol, and isopropanol were a predominant coagulant for the dope, and the coagulant containing 10% LiBr -H20 is best.
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Spinnability depended upon the ratio of nozzle hole length to diameter (LID) and was improved by increasing LID from 4 to 10. Coagulativity was not sufficient at the SF concentration of 16%, but improved by raising it up to 20%. Drawability of the spun filaments in water was improved at a temperature above 60°C. 3. The drawn fiber showed excellent mechanical properties, especially tensile toughness when as-spun fiber was drawn in water at 61OC. An X-ray diffraction diagram of the drawn fibers indicated their crystalline axes were partially oriented along the fiber axis.