The effect of residual silk sericin on the structure and mechanical property of regenerated silk filament
The effect of residual silk sericin on the structure and mechanical property of regenerated silk filament
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DOI：
10.1016/j.ijbiomac.2007.05.005
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发表时间：
2007-08-01
影响因子：
8.2
通讯作者：
Park, Young Hwan
中科院分区：
文献类型：
--
作者：
Ki, Chang Seok;Kim, Jong Wook;Park, Young Hwan
在本研究中，我们阐明了残留丝胶（SS）对再生丝长丝的结构和机械性能以及纤维形成的影响。通过将丝蛋白溶解在甲酸中制备的原液溶液中，随着残留SS含量的增加，原液粘度显着增加。 FTIR、C-13 NMR和XRD的结果表明，长丝中含有的少量SS（9.6%）表现出最高的β-折叠构象含量和最大的结晶度。看来SS通过容易诱导β-转变而在一定程度上影响SF的结构变化。含有 9.6-18.9% SS 的长丝的韧性在 2.1-2.4 gf/d 范围内，比不含 SS 的长丝（纯 SF）高约 50%。因此，随着湿法纺丝过程中可纺性的提高，SS对于发展SF的晶体结构以及改善再生丝纤维的机械性能发挥着重要作用。 (c) 2007 Elsevier B.V. 保留权利。
In this study, we elucidated the effect of residual silk sericin (SS) on structure and mechanical properties of regenerated silk filament as well as on fiber formation. The dope viscosity markedly increased with increasing residual SS content in dope solution which was prepared by dissolving the silk protein in formic acid. As a result of FTIR, C-13 NMR, and XRD, a small amount of SS (9.6%) contained in the filament showed highest content of beta-sheet conformation and maximum crystallinity. It seems that the SS affects the structural change of SF up to a certain level by inducing the beta-transition easily. The tenacity of the filaments, containing 9.6-18.9% SS, was in the range of 2.1-2.4 gf/d, which was about 50% higher than the filament without SS (pure SF). Consequently, with the enhancement of spinnability in wet spinning process, the SS can play an important role for developing the crystalline structure of SF as well as for improving mechanical properties of the regenerated silk fiber. (c) 2007 Elsevier B.V. rights reserved.