A temperature sensor based on a MWCNT/SEBS nanocomposite

Abstract The fabrication of a temperature sensor based on multi-walled carbon nanotubes (MWCNTs)/styrene-b-(ethylene-co-butylene)-b-styrene (SEBS) triblock copolymer composite is reported. The device was realized by drop casting 10 μl of a MWCNTs dispersion in a toluene solution of SEBS onto gold electrodes fabricated onto a polyimide support. Thermogravimetric and electrical resistance measurements highlighted a good reproducibility of film composition and sensing properties. A negative temperature coefficient with an absolute value comparable to the highest values in metals was measured when a substantial amount of MWCNTs was incorporated into the nanocomposite (40% by weight), and a five-fold increase was observed close to the percolation threshold. Though such sensitivity seems to be partly lost after the first heating, the results allowed us to be optimistic about the feasibility of realizing nanocomposite films with temperature sensitivities comparable to that of common thermistors in the range 20–60 °C.

[1]  J. Fraser Stoddart,et al.  Preparation and Properties of Polymer-Wrapped Single-Walled Carbon Nanotubes , 2001 .

[2]  Andrea Pucci,et al.  Nanocomposites based on polyolefins and functional thermoplastic materials , 2008 .

[3]  M. Maugey,et al.  In situ measurements of nanotube dimensions in suspensions by depolarized dynamic light scattering. , 2004, Langmuir : the ACS journal of surfaces and colloids.

[4]  W. D. de Heer,et al.  Carbon Nanotubes--the Route Toward Applications , 2002, Science.

[5]  A. Rinzler,et al.  Carbon nanotube actuators , 1999, Science.

[6]  D. Lee,et al.  Properties of nanocomposites based on sulfonated poly(styrene-b-ethylenebutylene-b-styrene) and multiwalled carbon nanotubes , 2008 .

[7]  Christian A. Martin,et al.  Formation of percolating networks in multi-wall carbon-nanotube–epoxy composites , 2004 .

[8]  Tao Zhou,et al.  Molecular Chain Movements and Transitions of SEBS above Room Temperature Studied by Moving-Window Two-Dimensional Correlation Infrared Spectroscopy , 2007 .

[9]  Chien-Wei Liu,et al.  Nano Temperature Sensor Using Selective Lateral Growth of Carbon Nanotube Between Electrodes , 2007, IEEE Transactions on Nanotechnology.

[10]  J. Luck,et al.  The electrical conductivity of binary disordered systems, percolation clusters, fractals and related models , 1990 .

[11]  Karl I. Jacob,et al.  Experimental trends in polymer nanocomposites—a review , 2005 .

[12]  I. Kinloch,et al.  Ultra-low electrical percolation threshold in carbon-nanotube-epoxy composites , 2003 .

[13]  N. Koratkar,et al.  Temperature effects on resistance of aligned multiwalled carbon nanotube films. , 2004, Journal of nanoscience and nanotechnology.

[14]  Volkov,et al.  Supercurrents through single-walled carbon nanotubes , 1999, Science.

[15]  P. Ajayan,et al.  Capillarity-induced filling of carbon nanotubes , 1993, Nature.

[16]  Sibdas Singha Mahapatra,et al.  Functionalization of Multiwalled Carbon Nanotubes with Poly(styrene-b-(ethylene-co-butylene)-b-styrene) by Click Coupling , 2010 .

[17]  J. M. Kikkawa,et al.  Very Low Conductivity Threshold in Bulk Isotropic Single‐Walled Carbon Nanotube–Epoxy Composites , 2005 .

[18]  Oren Regev,et al.  Toolbox for Dispersing Carbon Nanotubes into Polymers To Get Conductive Nanocomposites , 2006 .

[19]  D. Tasis,et al.  Carbon nanotube–polymer composites: Chemistry, processing, mechanical and electrical properties , 2010 .

[20]  Yiu-Wing Mai,et al.  Dispersion and alignment of carbon nanotubes in polymer matrix: A review , 2005 .

[21]  Samanta Piano,et al.  Multiwalled carbon nanotube films as small-sized temperature sensors , 2009 .

[22]  Richard H. Friend,et al.  Composites of Carbon Nanotubes and Conjugated Polymers for Photovoltaic Devices , 1999 .

[23]  Wen J. Li,et al.  Bulk carbon nanotubes as sensing element for temperature and anemometry micro sensing , 2003, The Sixteenth Annual International Conference on Micro Electro Mechanical Systems, 2003. MEMS-03 Kyoto. IEEE.

[24]  C. Dekker,et al.  Logic Circuits with Carbon Nanotube Transistors , 2001, Science.

[25]  M. Moniruzzaman,et al.  Polymer Nanocomposites Containing Carbon Nanotubes , 2006 .

[26]  F. Picchioni,et al.  Grafting of diethyl maleate and maleic anhydride onto styrene-b-(ethylene-co-1-butene)-b-styrene triblock copolymer (SEBS) , 2000 .

[27]  S. Iijima.  Helical microtubules of graphitic carbon , 1991, Nature.

[28]  Snyder,et al.  Geometrical percolation threshold of overlapping ellipsoids. , 1995, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[29]  R. Andrews,et al.  Carbon nanotube polymer composites , 2004 .

[30]  R. Hoch,et al.  High power electrochemical capacitors based on carbon nanotube electrodes , 1997 .

[31]  Yongjin Li,et al.  Toward a Stretchable, Elastic, and Electrically Conductive Nanocomposite: Morphology and Properties of Poly[styrene-b-(ethylene-co-butylene)-b-styrene]/Multiwalled Carbon Nanotube Composites Fabricated by High-Shear Processing , 2009 .