Enhanced electrical properties of polyaniline carbon nanotube composites: Analysis of temperature dependence of electrical conductivity using variable range hopping and fluctuation induced tunneling models

2021 ◽  
pp. 122232
Author(s):  
P.A.Francis Xavier ◽  
M.D. Benoy ◽  
Seenamol K. Stephen ◽  
Thomas Varghese
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Electrical Properties ◽  
Temperature Dependence ◽  
Variable Range Hopping ◽  
Variable Range ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

scholarly journals Effect of Dispersion by Three-Roll Milling on Electrical Properties and Filler Length of Carbon Nanotube Composites

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3823 ◽  
Author(s):  
Ha ◽  
Lee ◽  
Park
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Electrical Properties ◽  
Milling Time ◽  
Milling Process ◽  
High Concentration ◽  
Uniform Dispersion ◽  
Dispersion State ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

For practical use of carbon nanotube (CNT) composites, especially in electronic applications, uniform dispersion of a high concentration of CNTs in a polymer matrix is a critical challenge. Three-roll milling is one of most reliable dispersion techniques. We investigate the effect of three-roll milling time on CNT length and the electrical properties of a CNT/polydimethylsiloxane composite film with 10 wt% CNTs. During the milling process, the CNT length is decreased from 10 to 1–4 μm by mechanical shear forces. The electrical conductivity increases after 1.5 min of milling owing to dispersion of the CNTs but decreases with increasing milling time owing to the decrease in the CNT length. Considering the changes in the electrical conductivity of the CNT composite and CNT length, we determined how to optimize the three-roll milling time to obtain a suitable dispersion state.

Thermal and Electrical Properties of Polypropylene/Carbon Nanotube Composites

2011 ◽  
Vol 299-300 ◽  
pp. 802-805
Author(s):  
Jing Long Gao ◽  
Yan Hui Liu
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Properties ◽  
Carbon Nanotube ◽  
Electrical Properties ◽  
Degradation Rate ◽  
Volume Resistivity ◽  
Xrd Pattern ◽  
Nanotube Composites ◽  
Thermal And Electrical Properties ◽  
Carbon Nanotube Composites

In this work, the carbon nanotubes(CNTs) were reinforced with polypropylene(PP)matrix resins to improve the electrical and thermal properties of PP/ CNTs composites in different contents of 0,1, 3,and 5 wt.%. The surface, volume resistivity and crystallization type of the composites were investigated. As a result, the maximum degradation rate temperature of the composite is improved 30 °C, the surface resistivity and volume resistivity of composite are 5 ×106, 7 ×105,respectively, for the optimum composition of composite (CNTs 3 wt.%). The integrated XRD pattern of the composites shows the typical α-form PP crystals.

Piezoresistance Characterization of Poly(Dimethyl-Siloxane)-Multiwall Carbon Nanotube Composites

2010 ◽  
Author(s):  
Reza Rizvi ◽  
Sara Makaremi ◽  
Steven Botelho ◽  
Elaine Biddiss ◽  
Hani Naguib
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Multiwall Carbon Nanotube ◽  
Dimethyl Siloxane ◽  
Conducting Filler ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
Electronic Textile ◽  
Multiwall Carbon

This study examines the piezoresistive behavior of polymer-conducting filler composites. Piezoresistive composites of Poly(dimethyl-siloxane)-Multiwall Carbon Nanotube (PDMS-MWNT) were prepared using a direct mixing approach. The dispersion and the electrical conductivity of the composites were characterized at various MWNT compositions. The piezoresistive behavior under compression was measured using an Instron Universal Tester/Digital Sourcemeter combination. Negative piezoresistive behavior was observed signifying a reducing mean inter-particulate distance in the composites. Moreover, the sensitivities increased at two compositional values of 3 and 5 wt% MWNT in PDMS, which was associated with the state of MWNT dispersion observed. Tensile piezoresistive behavior of the PDMS-MWNT adhered on a fabric substrate was also characterized. Positive piezoresistive values, indicating increasing inter-particulate distance, were observed. Significant challenges in the implementation of PDMS-MWNT as sensory materials in electronic-textile applications were observed as a result of this study and have been discussed.

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