Effect of stress on the molecular structure and mechanical properties of supercontracted spider dragline silks

doi:10.1039/c9tb02032b

	Effect of stress on the molecular structure and mechanical properties of supercontracted spider dragline silks
	Dong, Qinglin 1; Fang, Guangqiang 1; Huang, Yufang 2; Hu, Linli 1; Yao, Jinrong 1; Shao, Zhengzhong 1; Ling, Shengjie3 ; Chen, Xin 1
	2020-01-07
发表期刊	JOURNAL OF MATERIALS CHEMISTRY B
ISSN	2050-750X
EISSN	2050-7518
卷号	8 期号:1 页码:168-176
发表状态	已发表
DOI	10.1039/c9tb02032b
摘要	Supercontraction is one of the most interesting properties of spider dragline silks. In this study, changes in the secondary structures of the Nephila edulis spider dragline silk after it was subjected to different supercontraction processes were investigated by integrating synchrotron Fourier transform infrared (S-FTIR) microspectroscopy and mechanical characterization. The results showed that after free supercontraction, the beta-sheet lost most of its orientation, while the helix and random coils were almost totally disordered. Interestingly, by conducting different types of supercontractions (i.e., stretching of the free supercontracted spider dragline silk to its original length or performing constrained supercontraction), it was found that although the molecular structures all changed after supercontraction, the mechanical properties almost remained unchanged when the length of the spider dragline silk did not change significantly. The other interesting conclusion obtained is that the manual stretching of a poorly oriented spider dragline silk cannot selectively improve the orientation degree of the beta-sheet in the spider silk, but increase the orientation degree of all conformations (beta-sheet, helix, and random). These experimental findings not only help to unveil the structure-property-function relationship of natural spider silks, but also provide a useful guideline for the design of biomimetic spider fiber materials.
收录类别	SCI ; SCIE ; EI
语种	英语
资助项目	National Natural Science Foundation of China[21574023] ; National Natural Science Foundation of China[21574024] ; National Natural Science Foundation of China[51973116] ; National Natural Science Foundation of China[U1832109] ; National Natural Science Foundation of China[21935002]
WOS研究方向	Materials Science
WOS类目	Materials Science, Biomaterials
WOS记录号	WOS:000503484700014
出版者	ROYAL SOC CHEMISTRY
EI入藏号	20200608131078
EI主题词	Biomimetics ; Fourier transform infrared spectroscopy ; Mechanical properties ; Molecular structure ; Silk
EI分类号	Structural Design:408 ; Biotechnology:461.8 ; Chemistry:801 ; Physical Chemistry:801.4 ; Natural Fibers:819.1 ; Materials Science:951
WOS关键词	FIBERS ; ORIENTATION ; WATER ; BEHAVIOR ; STATE ; NMR ; SPECTROSCOPY ; EVOLUTION ; SOLVENTS ; C-13
原始文献类型	Article
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/104996
专题	物质科学与技术学院_PI研究组_凌盛杰组
通讯作者	Ling, Shengjie; Chen, Xin
作者单位	1.Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Lab Adv Mat, Shanghai 200433, Peoples R China 2.Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China 3.Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China
通讯作者单位	物质科学与技术学院
推荐引用方式 GB/T 7714	Dong, Qinglin,Fang, Guangqiang,Huang, Yufang,et al. Effect of stress on the molecular structure and mechanical properties of supercontracted spider dragline silks[J]. JOURNAL OF MATERIALS CHEMISTRY B,2020,8(1):168-176.
APA	Dong, Qinglin.,Fang, Guangqiang.,Huang, Yufang.,Hu, Linli.,Yao, Jinrong.,...&Chen, Xin.(2020).Effect of stress on the molecular structure and mechanical properties of supercontracted spider dragline silks.JOURNAL OF MATERIALS CHEMISTRY B,8(1),168-176.
MLA	Dong, Qinglin,et al."Effect of stress on the molecular structure and mechanical properties of supercontracted spider dragline silks".JOURNAL OF MATERIALS CHEMISTRY B 8.1(2020):168-176.