Determination of Elastic Modulus of Spider’s Silks
Determination of Elastic Modulus of Spider’s Silks
复制标题
蜘蛛丝弹性模量的测定
DOI：
10.1295/polymj.34.25
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发表时间：
2002
期刊：
影响因子：
2.8
通讯作者：
Rie Ishikawa
中科院分区：
文献类型：
--
作者：
S. Osaki;Rie Ishikawa
弹性模量测定的应力-应变曲线分泌的拉绳从Nephila clavata蜘蛛（日本金网蜘蛛）收集在不同的生长阶段。为了准确地确定弹性模量，有必要测量由用于测量应力-应变曲线的双丝组成的相同拉铲的横截面积。弹性模量被确定为ca。10 GPa的蜘蛛重量小于50毫克，约。13 GPa的蜘蛛重量在50和800毫克之间，和约。体重超过800毫克的老蜘蛛为10 GPa。相对较小的Ca值。10 GPa的弹性模量可能来自重量小于50 mg的拖铲的相对大的横截面积，以及来自重量大于800 mg的拖铲的弹性极限强度的小值。结果发现，蜘蛛的拖丝组成的几乎无定形的蛋白质分子的弹性模量是比较大的几个GPa的无定形合成聚合物的弹性模量相比。
Elastic moduli were determined from the stress–strain curves of draglines secreted from Nephila clavata spiders (Japanese golden-web spiders) collected at different stages of growth. In order to accurately determine the elastic modulus it was necessary to measure the cross sectional area of the same dragline consisting of double filaments used for measuring the stress–strain curves. The elastic modulus was determined to be ca. 10 GPa for spiders weighing less than 50 mg, ca. 13 GPa for spiders weighing between 50 and 800 mg, and ca. 10 GPa for old spiders weighing more than 800 mg. The relatively small values of ca. 10 GPa for the elastic modulus may come from the relatively large cross sectional area of the draglines for spiders weighing less than 50 mg and from the small value of the elastic limit strength for spiders weighing more than 800 mg. It was found that the elastic modulus of spider’s draglines consisting of almost amorphous protein molecules was relatively large in comparison with the elastic modulus of several GPa obtained for amorphous synthetic polymers.