期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 584, 期 -, 页码 1-10出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.09.035
关键词
Polyacrylonitrile; Thermoplastic polyurethane; MXene
资金
- 973 Programme [2015CB654700, 2015654703]
- National Natural Science Foundation of China [51573051, 51703063]
- Qingyuan Science and Technology Programme [2019A041]
- Opening Project Fund of Key Laboratory of Rubber Biology and Genetic Resource Utilization, Ministry of Agriculture [RRI-KLOF201706]
- Youth Project of Science and Technology Research Program of Chongqing Education Commission of China [KJQN201900517]
- Open Fund for Key Lab of Guangdong High Property and Functional Macromolecular Materials, China [20190008]
By altering the composition of the flexible substrate, the interaction between MXene and the substrate was effectively enhanced, resulting in a flexible strain sensor with excellent properties.
Hypothesis: MXenes (two-dimensional early transition metal carbides and carbonitrides) possess both excellent conductivity and surface hydrophilicity, enabling more diverse potential applications. However, in flexible strain sensors, the flexible substrates are usually composed of hydrophobic elastomers such as thermoplastic polyurethane (TPU). To enhance the interactions between MXenes and hydrophobic. substrates, it is wiser to change the composition of the flexible substrate than to modify the surface of MXenes, so as to improve the interactions between the flexible substrate and MXenes without losing the excellent conductivity of MXene. Experiments: We introduce polyacrylonitrile (PAN) into TPU, and then fabricate a flexible TPU/PAN mat through electrospinning. A highly conductive and stretchable Ti3C2 MXene/TPU/PAN mat was then prepared by a simple dip-coating process. The interaction mechanism between Ti3C2 MXene nanosheets and TPU/PAN mat was investigated by XPS and FT-IR. Finally, we build the MXene/TPU/PAN mat into a flexible strain sensor with excellent properties. Findings: By introducing PAN into flexible substrate, the interaction between Ti3C2 MXene and the flexible substrate was effectively improved without compromising Ti3C2 MXene's excellent conductivity. The MXene/TPU/PAN strain sensor possesses a wide sensing range (0-80%), a fast response (<140.6 ms), a low limit of detection (<0.1%), splendid coating adhesion and excellent durability (>1750 cycles). All of these properties are demanded in wearable electronics. (C) 2020 Elsevier Inc. All rights reserved.
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