Sliding Cyclodextrin Molecules along Polymer Chains to Enhance the Stretchability of Conductive Composites

被引:30
作者
Du, Ruichun [1 ]
Jin, Qi [1 ]
Zhu, Tangsong [1 ]
Wang, Changxian [2 ]
Li, Sheng [3 ]
Li, Yanzhen [2 ]
Huang, Xinxin [1 ]
Jiang, Ying [2 ]
Li, Wenlong [2 ]
Bao, Tianwei [1 ]
Cao, Pengfei [4 ]
Pan, Lijia [3 ]
Chen, Xiaodong [2 ]
Zhang, Qiuhong [1 ]
Jia, Xudong [1 ,5 ]
机构
[1] Nanjing Univ, Sch Chem & Chem Engn, Key Lab High Performance Polymer Mat & Technol, Minist Educ MOE,Dept Polymer Sci & Engn, Nanjing 210093, Peoples R China
[2] Nanyang Technol Univ, Sch Mat Sci & Engn, 50 Nanyang Ave, Singapore 639798, Singapore
[3] Nanjing Univ, Sch Elect Sci & Engn, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
[4] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA
[5] Nanjing Univ, State Key Lab Coordinat Chem, Nanjing 210093, Peoples R China
基金
中国国家自然科学基金;
关键词
broad working range; interfaces; self-healing; sliding polyrotaxanes; stretchable electronics; STRAIN SENSOR; RING GELS; TRANSPARENT; POLYROTAXANE;
D O I
10.1002/smll.202200533
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The demand for stretchable electronics with a broader working range is increasing for wide application in wearable sensors and e-skin. However, stretchable conductors based on soft elastomers always exhibit low working range due to the inhomogeneous breakage of the conductive network when stretched. Here, a highly stretchable and self-healable conductor is reported by adopting polyrotaxane and disulfide bonds into the binding layer. The binding layer (PR-SS) builds the bridge between polymer substrates (PU-SS) and silver nanowires (AgNWs). The incorporation of sliding molecules endows the stretchable conductor with a long sensing range (190%) due to the energy dissipation derived from the sliding nature of polyrotaxanes, which is two times higher than the working range (93%) of conductors based on AP-SS without polyrotaxanes. Furthermore, the mechanism of sliding effect for the polyrotaxanes in the elastomers is investigated by SEM for morphological change of AgNWs, in situ small-angle x-ray scattering, as well as stress relaxation experiments. Finally, human-body-related sensing tests and a self-correction system in fitness are designed and demonstrated.
引用
收藏
页数:12
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