Highly stretchable and ultrathin nanopaper composites for epidermal strain sensors

被引:60
作者
Sun, Jingyao [1 ,2 ]
Zhao, Yanan [2 ]
Yang, Zhaogang [2 ]
Shen, Jingjing [3 ]
Cabrera, Eusebio [4 ]
Lertola, Matthew J. [2 ]
Yang, Willie [2 ]
Zhang, Dan [4 ]
Benatar, Avi [5 ]
Castro, Jose M. [4 ]
Wu, Daming [1 ,6 ]
Lee, L. James [2 ]
机构
[1] Beijing Univ Chem Technol, Coll Mech & Elect Engn, Beijing 100029, Peoples R China
[2] Ohio State Univ, Dept Chem & Biomol Engn, Columbus, OH 43210 USA
[3] Taizhou Univ, Sch Civil Engn & Architecture, Taizhou 318000, Zhejiang, Peoples R China
[4] Ohio State Univ, Dept Integrated Syst Engn, Columbus, OH 43210 USA
[5] Ohio State Univ, Dept Mat Sci & Engn, 116 W 19Th Ave, Columbus, OH 43210 USA
[6] State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
基金
中国国家自然科学基金;
关键词
ultrathin strain sensor; high stretchability; carbon nanotube nanopaper; poly(dimethyl siloxane) (PDMS); ultrasonication; CARBON NANOTUBE; TRANSPARENT; NANOCOMPOSITES; NETWORK; CONDUCTIVITY; SENSITIVITY; PERFORMANCE; CONDUCTORS; PRESSURE; SKIN;
D O I
10.1088/1361-6528/aacc59
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Multifunctional electronics are attracting great interest with the increasing demand and fast development of wearable electronic devices. Here, we describe an epidermal strain sensor based on an all-carbon conductive network made from multi-walled carbon nanotubes (MWCNTs) impregnated with poly(dimethyl siloxane) (PDMS) matrix through a vacuum filtration process. An ultrasonication treatment was performed to complete the penetration of PDMS resin in seconds. The entangled and overlapped MWCNT network largely enhances the electrical conductivity (1430 S m(-1)), uniformity (remaining stable on different layers), reliable sensing range (up to 80% strain), and cyclic stability of the strain sensor. The homogeneous dispersion of MWCNTs within the PDMS matrix leads to a strong interaction between the two phases and greatly improves the mechanical stability (ca. 160% strain at fracture). The flexible, reversible and ultrathin (< 100 mu m) film can be directly attached on human skin as epidermal strain sensors for high accuracy and real-time human motion detection.
引用
收藏
页数:11
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