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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical Properties of Single-Brin Silkworm Silk
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Mechanical Properties of Single-Brin Silkworm Silk

机译：单眼蚕丝的力学性能

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摘要

Mechanical tests were performed on single brins of Bombyx mori silkworm silk,to obtain values of elastic modulus (E), yield strength, tensile breaking strength,and shear modulus (G).Specimen cross-sectional areas, needed to convert tensile loads into stresses,were derived from diameter measurements performed by scanning electron microscopy.Results are compared with existing literature values for partially degummed silkworm baves. The tensile modulus (16+-1 GPa)and yield strength (230+-10 MPa)of B.mori brin are significantly higher than the literature values reported for bave. The difference is attributed principally to the presence of sericin in bave,contributing to sample cross-section but adding little to the fiber's ability to resist tensile deformation. The two brins in bave found to contribute equally and independently to the tensile load-bearing ability of the material. Measurements performed with a torsional pendulum can be combined with tensile load-extension data to obtain a value of E/G that is not sensitive to sample cross-sectional dimensions or,therefore,to the presence of sericin.The value of E measured for brin can be used together with this result to botain G=3.0+-0.8 GPa and E/G=5.3+-0.3 for brin. The latter value indicates a mechanical.and therefore microstructural, anisotropy comparable to that of nylon.
机译：对家蚕蚕丝的单皮进行机械测试，以获得弹性模量（E），屈服强度，拉伸断裂强度和剪切模量（G）的值。将横截面面积转换为拉伸载荷所需的应力通过扫描电子显微镜进行直径测量得出结果。将结果与部分脱胶的蚕宝宝的现有文献值进行比较。 B.mori brin的拉伸模量（16 + -1 GPa）和屈服强度（230 + -10 MPa）明显高于bave报道的文献值。这种差异主要归因于bave中丝胶的存在，有助于样品的横截面，但几乎没有增加纤维抵抗拉伸变形的能力。发现在面包中的两个皮蛋同等地和独立地对材料的拉伸承载能力作出贡献。可以将使用扭转摆进行的测量与拉伸载荷-拉伸数据结合使用，以获得对样品横截面尺寸或丝胶蛋白的存在不敏感的E / G值。可以与该结果一起使用以得到B = G = 3.0 + -0.8 GPa和E / G = 5.3 + -0.3。后一个值表明机械各向异性和微观结构各向异性与尼龙相当。

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