期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 8, 期 6, 页码 1933-1942出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9tc04853g
关键词
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资金
- Shandong Key RD Program [2019GSF109050]
- Research Leader Foundation of 20 Policies of Colleges and Universities'' of Jinan City [2018GXRC027]
- National Natural Science Foundation of China [31670590]
- Natural Science Foundation of Shandong Province [ZR2017MB009]
- Young Doctoral Cooperation Fund of Qilu University of Technology (Shandong Academy of Sciences) [2017BSHZ014]
- Taishan Scholars Program
The design and fabrication of healable strain sensors with high mechanical strength are highly demanded. We have fabricated multi-functional carbon nanotube (CNT) mechanically enhanced composite hydrogels synthesized by random copolymerization of acryloyloxyethyltrimethyl ammonium chloride (DAC) and acrylamide (AM) in aqueous suspensions of CNTs. The fabricated P(DAC-co-AM)/CNT composite hydrogels possess relatively high mechanical strength (toughness: 1.6 MJ m(-3), Young's modulus: similar to 0.2 MPa) and can be stretched to a strain of 1017% and compressed to a strain of 80%. Importantly, the P(DAC-co-AM)/CNT composite hydrogels demonstrate a high self-healing ability with >90% mechanical self-healing efficiency and electrical healing property. The high mechanical strength and healing ability can be controlled by different CNT contents and are due to the reversible ionic interaction and hydrogen bond interactions between the functional group of P(DAC-co-AM) and carboxyl groups of CNTs. More importantly, the P(DAC-co-AM)/CNT hydrogels demonstrate stable strain sensitivity and can be fixed on human body to monitor human actions without using additional tape or rope.
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