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240426s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202402278
|2 doi
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|a eng
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| 100 |
1 |
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|a Jiang, Zhen
|e verfasserin
|4 aut
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|a Crack-Resistant and Tissue-Like Artificial Muscles with Low Temperature Activation and High Power Density
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 11.07.2024
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|a Date Revised 11.07.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2024 The Authors. Advanced Materials published by Wiley‐VCH GmbH.
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|a Constructing soft robotics with safe human-machine interactions requires low-modulus, high-power-density artificial muscles that are sensitive to gentle stimuli. In addition, the ability to resist crack propagation during long-term actuation cycles is essential for a long service life. Herein, a material design is proposed to combine all these desirable attributes in a single artificial muscle platform. The design involves the molecular engineering of a liquid crystalline network with crystallizable segments and an ethylene glycol flexible spacer. A high degree of crystallinity can be afforded by utilizing aza-Michael chemistry to produce a low covalent crosslinking density, resulting in crack-insensitivity with a high fracture energy of 33 720 J m-2 and a high fatigue threshold of 2250 J m-2. Such crack-resistant artificial muscle with tissue-matched modulus of 0.7 MPa can generate a high power density of 450 W kg-1 at a low temperature of 40 °C. Notably, because of the presence of crystalline domains in the actuated state, no crack propagation is observed after 500 heating-cooling actuation cycles under a static load of 220 kPa. This study points to a pathway for the creation of artificial muscles merging seemingly disparate, but desirable properties, broadening their application potential in smart devices
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|a Journal Article
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|a artificial muscles
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| 650 |
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|a crack‐resistance
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| 650 |
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|a fracture mechanics
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|a liquid crystalline networks
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| 650 |
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|a tissue‐like soft materials
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1 |
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|a Tran, Bach H
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Jolfaei, Maryam Adavoudi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Abbasi, Burhan Bin Asghar
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Spinks, Geoffrey M
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 28 vom: 01. Juli, Seite e2402278
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|x 1521-4095
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|g volume:36
|g year:2024
|g number:28
|g day:01
|g month:07
|g pages:e2402278
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|u http://dx.doi.org/10.1002/adma.202402278
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