Abstract:

Functional materials with excellent piezoresistance sensitivity are attracting more attention due that they can be used as advanced materials in pressure sensors. For the researched piezoresistance nanocomposites, we employ one-dimensional (1D) carbon nanotubes (CNT) with difference aspect ratios and two-dimensional (2D) graphene as conducting functional fillers and silicone rubber as polymer matrix, which can produce a great strain at low stress so that finally the nancomposites show outstanding piezoresistance sensitivity. Different to the zero-dimensional (0D) carbon black (CB)/polymer composites, the 1D and 2D carbon nanofiller/silicone rubber nanocomposites display a positive piezoresistance effect (PPRE), namely the resistance of nanocomposites increases with an increase in pressure stress. Therefore, the mechanism of PPRE is studied in this work by employing the insulating SiO2 nanoparticles and the electrical conducting CB particles as the second kind of fillers. In addition, the effect of aspect ratio (AR) of 1D-CNT on piezoresistivity was explored. A correlation between AR of 1D-CNT and piezoresistivity of the corresponding composites was established.

Keywords: dimension; conducting filler; piezoresistance; nanocomposite; mechanism

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个人简介：

(a).  Professional Preparation
Jilin University              Applied Chemistry   B.S. (1994)
Xian Modern Chemistry Institute Polymer Science and Engineering              M.S. (1997)
Xian Jiaotong University  Electrical Engineering                Ph.D (2001)
Tsinghua University    Material Science and Engineering Postdoc (2001-2003)

(b). Appointments
09/2003-07/2010  Professor, Department of Functional Polymers, College of Materials Science and Engineering, Beijing University of Chemical Technology, China
08/2010-present   Professor, Department of Polymer Science and Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, China
12/2003-06/2004   Visiting Scientist, Department of Materials and Physics, City University of Hong Kong, China 
01/2006-06/2007   Visiting Scientist, University of Potsdam and Max-Planck Institute on Colloid and Interface, Germany
2008-2014      Visiting Professor, Ecole Centrale Paris, France

(c). Achievements (more than 120 SCI papers published and 7 authorized Chinese patents)
[1] Zhi-Min Dang*, Jin-Kai Yuan, et al. Fundamentals, processes and applications of high-permittivity polymer-matrix composites. Progress in Materials Science, 2012, 57, 660-723. (Invited Review)
[2] Zhi-Min Dang*, Jin-Kai Yuan, Sheng-Hong Yao, Rui-Jin Liao. Flexible nanodielectric materials with high permittivity for power energy storage. Advanced Materials, 2013, 25, 6334-6365. (Invited Review)
[3] Zhi-Min Dang*, Jin-Kai Yuan, Jun-Wei Zha, Peng-Hao Hu, Dong-Rui Wang, Zhong-Yang Cheng High-permittivity polymer nanocomposites: influence of interface on dielectric properties. Journal of Advanced Dielectrics 2013, 3(3), 1330004(1-8). (Invited Review)
[4] Zhi-Min Dang*, Tao Zhou, et al. Advanced Calcium Copper Titanate/Polyimide hybrid films with high dielectric permittivity. Advanced Materials, 2009, 21, 2077-2082.
[5] Zhi-Min Dang*, You-Qin Lin, et al. Fabrication and Dielectric Characterization of Advanced BaTiO3/polyimide nanocomposite films. Advanced Functional Materials, 2008, 18, 1509-1517.
[6] Zhi-Min Dang*, Lan Wang, et al. Giant dielectric permittivities in functionalized carbon-nanotube/electroactive-polymer nanocomposites. Advanced Materials, 2007, 19, 852-857.
[7] Yi-He Zhang, Sheng-Guo Lu,Yuan-Qing Li, Zhi-Min Dang, et al. Novel Silica Tube/Polyimide Composite Films with Variable Low Dielectric Constant. Advanced Materials, 2005, 17(8), 1056-1058.
[8] Z.-M. Dang, Y.-H. Lin, C.-W. Nan. Novel Ferroelectric Polymer-matrix Composites with a High Dielectric Constant at the Percolation Threshold. Advanced Materials, 2003, 15(19), 1625-1629.
[9] Jun-Wei Zha, Wei-Kang Li, Rui-Jin Liao, Jinbo Bai, Zhi-Min Dang*. High performance hybrid carbon fillers/binary–polymer nanocomposites with remarkably enhanced positive temperature coefficient effect of resistance. Journal of Materials Chemistry A, 2013, 1, 843-851.