Mechanical testing of spider silk at cryogenic temperatures

被引：7
|
作者：
Pogozelski, E. M. [1 ]
Becker, W. L. [2 ]
See, B. D. [3 ]
Kieffer, C. M. [4 ]
机构：
[1] SUNY Coll Geneseo, Dept Phys, Geneseo, NY 14454 USA
[2] Colorado Sch Mines, Dept Mech Engn, Golden, CO 80401 USA
[3] Univ Michigan, Dept Ind & Operat Engn, Ann Arbor, MI 48109 USA
[4] RS Technol Inc, Melbourne, FL 32935 USA
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2011年 / 48卷 / 01期
关键词：
Spider silk; Strength; Cryogenic; Liquid nitrogen; Steatoda triangulosa;
D O I：
10.1016/j.ijbiomac.2010.09.005
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
A method and results for mechanical testing of spider silk in extreme environments is presented. In particular, silk from the spider Steatoda triangulosa is harvested, and samples are subjected to cryogenic temperatures by means of liquid nitrogen submersion. Samples are destructively tested while immersed in liquid nitrogen, and the stress-strain characteristics are compared to those of silk at room temperature. The strength, elasticity, and toughness of the cryogenically submersed silk are determined. It is found that on average, silk is 64% stronger while immersed in liquid nitrogen (i.e., at -196 degrees C). The testing method could also be used for testing of silk in chemically hostile environments. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：27 / 31
页数：5
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