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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Preparation of regenerated silk fibroin/silk sericin fibers by coaxial electrospinning
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Preparation of regenerated silk fibroin/silk sericin fibers by coaxial electrospinning

机译：同轴静电纺丝法制备再生丝素蛋白/丝胶蛋白纤维

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摘要

The coaxial electrospinning using the regenerated silk fibroin (SF) and silk sericin (SS) aqueous solutions as the core and shell spinning dopes, respectively, was carried out to prepare regenerated SF/SS composite fibers with components and core-shell structure similar to the natural silkworm silks. It was found from the scanning electron microscope (SEM) and transmission electron microscope (TEM) results that the core dope (SF aqueous solution) flow rate (Q _c) and the applied voltage (V) had some effects on the morphology of the composite fiber. With an increase in Q _c, the diameter nonuniformity and eccentricity of the core fiber became serious, while the increasing V played an inverse role. In this work, the suitable Q _c for the fiber formation with better electrospinnability was about 6μL/min, and the corresponding optimum V was 40kV. Moreover, the results from Raman spectra analysis, modulated differential scanning calorimetry (MDSC), thermogravimetry (TG) measurement and mechanical property test showed that, compared with the pure SF fiber, the coaxially electrospun SF/SS fiber had more β-sheet conformation, better thermostability and mechanical properties. This was probably because that SS played significant roles in dehydrating SF molecules and inducing the conformational transition of SF to β-sheet structure.
机译：分别以再生的丝素蛋白（SF）和丝绢胶蛋白（SS）水溶液为芯和壳纺原液进行同轴电纺丝，以制备成分和芯-壳结构与SF / SS类似的再生SF / SS复合纤维。天然蚕丝。从扫描电子显微镜（SEM）和透射电子显微镜（TEM）的结果发现，芯涂料（SF水溶液）的流速（Q _c）和施加的电压（V）对复合材料的形态有一定影响。纤维。随着Q _c的增加，芯纤维的直径不均匀性和偏心率变得严重，而增加的V起反作用。在这项工作中，具有更好的电纺性的纤维形成的合适Q _c约为6μL/ min，相应的最佳V为40kV。此外，拉曼光谱分析，调制差示扫描量热法（MDSC），热重法（TG）测量和力学性能测试的结果表明，与纯SF纤维相比，同轴电纺SF / SS纤维具有更多的β-折叠构象，更好的热稳定性和机械性能。这可能是因为SS在SF分子脱水和诱导SF构象过渡到β-折叠结构中起重要作用。

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