Ultrarobust, tough and highly stretchable self-healing materials based on cartilage-inspired noncovalent assembly nanostructure

被引:404
作者
Wang, Yuyan [1 ]
Huang, Xin [1 ]
Zhang, Xinxing [1 ]
机构
[1] Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu, Peoples R China
基金
中国国家自然科学基金;
关键词
WEARABLE ELECTRONIC DEVICES; POLYURETHANE; ELASTOMER; NANOCOMPOSITES; EXFOLIATION; NANOSHEETS; MECHANISM; HYDROGEL; LAYER;
D O I
10.1038/s41467-021-21577-7
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Self-healing materials integrated with excellent mechanical strength and simultaneously high healing efficiency would be of great use in many fields, however their fabrication has been proven extremely challenging. Here, inspired by biological cartilage, we present an ultrarobust self-healing material by incorporating high density noncovalent bonds at the interfaces between the dentritic tannic acid-modified tungsten disulfide nanosheets and polyurethane matrix to collectively produce a strong interfacial interaction. The resultant nanocomposite material with interwoven network shows excellent tensile strength (52.3MPa), high toughness (282.7 MJ m(3), which is 1.6 times higher than spider silk and 9.4 times higher than metallic aluminum), high stretchability (1020.8%) and excellent healing efficiency (80-100%), which overturns the previous understanding of traditional noncovalent bonding self-healing materials where high mechanical robustness and healing ability are mutually exclusive. Moreover, the interfacical supramolecular crosslinking structure enables the functional-healing ability of the resultant flexible smart actuation devices. This work opens an avenue toward the development of ultrarobust self-healing materials for various flexible functional devices. Strong self-healing materials with high healing efficiency are of great use in many fields but their fabrication is extremely challenging. Here, the authors present a robust self-healing material by incorporating high density noncovalent bonds at the interfaces between dentritic tannic acid-modified tungsten disulfide nanosheets and a polyurethane matrix to collectively produce a strong interfacial interaction.
引用
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页数:10
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