Peculiar torsion dynamical response of spider dragline silk

Liu, Dabiao; Yu, Longteng; He, Yuming; Peng, Kai; Liu, Jie; Guan, Juan; Dunstan, D. J.

doi:10.1063/1.4990676

Cited by 17 publications

(18 citation statements)

References 42 publications

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“…Dragline silks used here were from spiders of Nephila pilipes , Nephila edulis , and Argiope versicolor . The technique for collecting spider silk samples has been introduced in the previous studies ( 6 , 11 ). For comparison purposes, control fiber specimens, including typical silk fiber from B. mori cocoon, keratin protein fiber of human hair, and synthetic polymer fiber of Kevlar, were also chosen for testing.…”

Section: Resultsmentioning

confidence: 99%

“…For comparison purposes, control fiber specimens, including typical silk fiber from B. mori cocoon, keratin protein fiber of human hair, and synthetic polymer fiber of Kevlar, were also chosen for testing. An apparatus based on image processing ( 6 , 21 ) for studying the humidity-driven torsional actuation of thin fibers with a ring-shaped paddle is illustrated in Fig. 1.…”

Section: Resultsmentioning

confidence: 99%

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Spider dragline silk as torsional actuator driven by humidity

et al. 2019

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Self-powered actuation driven by ambient humidity is of practical interest for applications such as hygroscopic artificial muscles. We demonstrate that spider dragline silk exhibits a humidity-induced torsional deformation of more than 300°/mm. When the relative humidity reaches a threshold of about 70%, the dragline silk starts to generate a large twist deformation independent of spider species. The torsional actuation can be precisely controlled by regulating the relative humidity. The behavior of humidity-induced twist is related to the supercontraction behavior of spider dragline silk. Specifically, molecular simulations of MaSp1 and MaSp2 proteins in dragline silk reveal that the unique torsional property originates from the presence of proline in MaSp2. The large proline rings also contribute to steric exclusion and disruption of hydrogen bonding in the molecule. This property of dragline silk and its structural origin can inspire novel design of torsional actuators or artificial muscles and enable the development of designer biomaterials.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Spider dragline silk as torsional actuator driven by humidity

et al. 2019

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“…Также возможно связывание волокон с AgNPs за счет способности лиганда (поливинилполипирролидон) образовывать водородные связи с различными химическими группами волокна и вандерваальсового взаимодействия. При этом образование водородных связей наиболее вероятно при участии карбонильной группы лиганда и гидроксильных, карбоксильных, первичных аминогрупп, содержащихся прежде всего в составе боковых радикалов аминокислот кетгута и шелка [22], а также при участии вторичных аминогрупп капроага и перлона.…”

Section: результаты исследования и их обсуждениеunclassified

Адсорбция Наночастиц Серебра На Моно-И Полифиламентных Волокнах

Джимак¹,

Малышко²,

Горячко³

et al. 2019

Rossijskie nanotehnologii

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“…The organization spider silk can be described by a hierarchical model in which distinct amino acid repeat sequences assemble into oriented beta‐sheet nanocrystals dispersed in a semi‐amorphous protein matrix having characteristic conformations across different length scales . The hierarchical organization of spider silk has been invoked to explain its numerous exceptional physical properties …”

Section: Introductionmentioning

confidence: 99%

Role of Skin Layers on Mechanical Properties and Supercontraction of Spider Dragline Silk Fiber

Yazawa

Malay

Masunaga

et al. 2018

Macromolecular Bioscience

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Spider dragline silk is a composite biopolymer that harbors extraordinary mechanical characteristics, and consists of a hierarchically arranged protein core surrounded by outer "skin" layers. However, the contribution of the successive fiber layers on material properties has not been well defined. Here, the influence of the different components on the physicochemical and mechanical properties of dragline is investigated. The crystal structure and the mechanical properties are not changed significantly after the removal of skin constituents, indicating that the core region of dragline silk fibers determines the structural and mechanical properties. Furthermore, the outer layers have little influence on supercontraction, suggesting they do not function as protection against the penetration of water molecules. On the other hand, the outer layers offer some protection against protease digestion. The present study provides insight into how the function and structure of silk fibers are modulated and facilitates the design of silk-inspired functional materials.

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Peculiar torsion dynamical response of spider dragline silk

Abstract: 15The torsional properties of spider dragline silks from Nephila edulis and Nephila

Cited by 17 publications

References 42 publications

Spider dragline silk as torsional actuator driven by humidity

Spider dragline silk as torsional actuator driven by humidity

Адсорбция Наночастиц Серебра На Моно-И Полифиламентных Волокнах

Role of Skin Layers on Mechanical Properties and Supercontraction of Spider Dragline Silk Fiber

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