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首页> 外文期刊>Journal of Applied Polymer Science >Differences in regenerated silk fibroin prepared with different solvent systems: From structures to conformational changes
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Differences in regenerated silk fibroin prepared with different solvent systems: From structures to conformational changes

机译：不同溶剂体系制备的再生丝素蛋白的差异：从结构到构象变化

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摘要

Dissolution is an important part of silk fibroin (SF) reprocessing, and it is the only way to process it into films, gels, porous scaffold materials, and electrostatic spinning silk fibers. There are a variety of dissolution systems used to dissolve SF. However, few studies have focused on the differences between these different solvent systems. The dissolution of SF with different solvent systems was investigated in this study. Regenerated silk fibroin (RSF) solutions and films were characterized by dynamic light scattering, Fourier transform infrared spectroscopy, differential scanning calorimetry, X-ray diffraction, and scanning electron microscopy. The results show that the RSF film structures changed with the solvent system, especially LiBr-H2O. The characterization proved that the random coil did not change into a -sheet structure during film formation, and this indicated that its crystal structure and thermal stability was different from others. Interestingly, the differences in the morphologies of all of the RSF films prepared with different solvents were outstanding. Because the mechanism and force of the ion in the solvent systems were different, the SF molecule was hydrolyzed differently in individual solvent systems and produced different hydrolyzed SF molecular chains. These chains had different self-assembly processes and would lead to RSF products with different microstructures and properties. This suggests that a suitable solvent should be chosen for different uses. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41959.
机译：溶解是丝素蛋白（SF）再加工的重要组成部分，它是将其加工成薄膜，凝胶，多孔支架材料和静电纺丝纤维的唯一方法。有多种溶解系统可用于溶解SF。但是，很少有研究关注这些不同溶剂系统之间的差异。在这项研究中研究了SF在不同溶剂体系中的溶解。通过动态光散射，傅立叶变换红外光谱，差示扫描量热法，X射线衍射和扫描电子显微镜对再生的丝素蛋白（RSF）溶液和薄膜进行了表征。结果表明，RSF薄膜的结构随溶剂体系的变化而变化，尤其是LiBr-H2O。表征证明，在成膜期间无规线圈没有改变为片状结构，这表明其无规线圈的晶体结构和热稳定性与其他不同。有趣的是，用不同溶剂制备的所有RSF膜的形貌差异都非常明显。由于离子在溶剂体系中的作用机理和作用力不同，因此SF分子在各个溶剂体系中的水解方式不同，并产生了不同的水解SF分子链。这些链具有不同的自组装过程，将导致具有不同的微观结构和性能的RSF产品。这表明应针对不同用途选择合适的溶剂。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41959。

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