| 摘要: |
| 近年来，再生蚕丝作为一种重要的生物资源已被广泛应用于人造组织、生物支架等领域，对其力学性能提出了较高的要求。为提高再生蚕丝的力学性能，采用化学还原法合成直径为80~100 nm、长度为8~11 μm的银纳米线（AgNWs），并将其作为共混材料，通过湿法纺丝工艺制备再生蚕丝，探讨AgNWs浓度对再生蚕丝力学性能和结构的影响。结果表明：不同浓度AgNWs均有利于提高再生蚕丝的力学性能，AgNWs浓度为4‰时，再生蚕丝的力学性能最佳，断裂强度可达233.41 MPa，断裂伸长率可达88.37%，显著高于普通的再生蚕丝（158.13 MPa和15.02%）。扫描电镜和红外光谱发现，添加AgNWs对再生蚕丝的形貌和直径无明显改变，但可促进丝素蛋白β-折叠构象形成。 |
| 关键词: 再生蚕丝 银纳米线 力学性能 |
| DOI：10.14188/j.ajsh.2020.06.010 |
| 分类号:S88 |
| 基金项目:江苏特聘教授项目（No.苏教师［2015］17） |
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| Effect of silver nanowires on properties of regenerated silk |
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XU Chen1, MA Qiang1, LI Ying2, LIU Yan2, WANG Xiaoliang2, WU Guohua1,2
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1.School of Environmental and Chemical Engineering， Jiangsu University of Science and Technology， Zhenjiang 212018， Jiangsu， China;2.School of Biotechnology， Jiangsu University of Science and Technology， Zhenjiang 212018， Jiangsu， China
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| Abstract: |
| In recent years， as an important biological resource， regenerated silk has been widely used in artificial tissue， biological scaffolds and other fields， which needs higher requirements for its mechanical properties. In order to improve the mechanical properties of the regenerated silk， silver nanowires （AgNWs） with the diameter of 80~100 nm and the length of 8~11 μm were synthesized by chemical reduction method， and were used as the blending agent to prepare regenerated silk by wet spinning. The effects of AgNWs on mechanical properties and structure of regenerated silk were analyzed. The results showed that AgNWs of different concentrations were beneficial to improve the mechanical properties of regenerated silk. When the content of AgNWs was 4 ‰， the mechanical property of regenerated silk was the best， the breaking strength could reach to 233.41 MPa， and the breaking strain could reach to 88.37%， which were significantly higher than ordinary regenerated silk （158.13 Mpa and 15.02%）. AgNWs did not significantly change the morphology and diameter of the regenerated silk， but can promote the formation of β-sheet of silk fibroin. |
| Key words: regenerated silk AgNWs mechanical property |
