Electro-mechanical properties of triblock copolymer styrene-butadiene-styrene/carbon nanotube composites for large deformation sensor applications

被引：79
作者：
Costa, P. [1 ]
Ferreira, A. [1 ]
Sencadas, V. [1 ,2 ]
Viana, J. C. [3 ]
Lanceros-Mendez, S. [1 ]
机构：
[1] Univ Minho, Ctr Dept Fis, P-4710058 Braga, Portugal
[2] Escola Super Tecnol, Inst Politecn Cavado & Ave, P-4750810 Barcelos, Portugal
[3] Univ Minho, Inst Polymers & Composites IPC I3N, P-4800058 Guimaraes, Portugal
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2013年 / 201卷
关键词：
Piezoresistive; Gauge factor; Carbon nanotube composites; Polymers; CARBON NANOTUBES; PIEZORESISTIVE PROPERTIES; ELECTRICAL-RESISTANCE; MICROMECHANICS; REINFORCEMENT; CONDUCTIVITY; PERFORMANCE; MECHANISMS;
D O I：
10.1016/j.sna.2013.08.007
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Thermoplastic elastomer/carbon nanotube composites are studied for sensor applications due to their excellent mechanical and electrical properties. Piezoresisitive properties of tri-block copolymer styrene-butadiene-styrene (SBS)/carbon nanotubes (CNT) prepared by solution casting have been investigated. The initial elastic modulus of the SBS/CNT composites increases with increasing the CNT filler content present in the samples, without losing the high deformation capability of the polymer matrix (similar to 1500%). Furthermore, above the percolation threshold these materials are unique for the development of large deformation sensors due to the strong piezoresistive response. Piezoresistive properties evaluated by uniaxial stretching in tensile mode and 4-point bending showed gauge factors up to 120. The linearity obtained between strain and electrical resistance makes these composites interesting for large strain piezoresistive sensors applications. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：458 / 467
页数：10
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