Effect of stress on the molecular structure and mechanical properties of supercontracted spider dragline silks
Dong, Qinglin1; Fang, Guangqiang1; Huang, Yufang2; Hu, Linli1; Yao, Jinrong1; Shao, Zhengzhong1; Ling, Shengjie3; Chen, Xin1
2020-01-07
Source PublicationJOURNAL OF MATERIALS CHEMISTRY B
ISSN2050-750X
Volume8Issue:1Pages:168-176
Status已发表
DOI10.1039/c9tb02032b
AbstractSupercontraction 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.
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMaterials Science
WOS SubjectMaterials Science, Biomaterials
WOS IDWOS:000503484700014
PublisherROYAL SOC CHEMISTRY
EISSN2050-7518
WOS KeywordFIBERS ; ORIENTATION ; WATER ; BEHAVIOR ; STATE ; NMR ; SPECTROSCOPY ; EVOLUTION ; SOLVENTS ; C-13
Original Document TypeArticle
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Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://kms.shanghaitech.edu.cn/handle/2MSLDSTB/104996
Collection物质科学与技术学院_PI研究组_凌盛杰组
Corresponding AuthorLing, Shengjie; Chen, Xin
Affiliation1.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
Corresponding Author AffilicationSchool of Physical Science and Technology
Recommended Citation
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.
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