Enhanced Electrical Properties of PVDF-TrFE Nanocomposite for Actuator Application

2014 ◽  
Vol 605 ◽  
pp. 335-339 ◽  
Author(s):  
Kie Yong Cho ◽  
A Ra Cho ◽  
Yun Jae Lee ◽  
Chong Min Koo ◽  
Soon Man Hong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Raman Spectroscopy ◽  
Electrical Properties ◽  
Polymer Nanocomposites ◽  
Casting Process ◽  
Polymer Nanocomposite ◽  
Solution Casting ◽  
Electromechanical Properties ◽  
Actuator Application

Carbon nanotubes (CNTs) coated by compatibilizer (P3HT-PMMA) imparted sta-ble dispersion in organic solvents and polymer matrix (P(VDF-TrFE)). The compatibility be-tween CNTs with P3HT-PMMA was con rmed by measuring Raman spectroscopy. CoatedCNTs were then blended with P(VDF-TrFE) (70:30 mol%) to obtain polymer nanocompositesby solution- casting process. Polymer nanocomposites showed enhanced electrical characteris-tics, as nanocomposites near the threshold of the transition between P(VDF-TrFE) insulatorand CNT conductor revealed great improvement of electrical conductivity up to 10-6 S/cmat 1 KHz. Electromechanical properties of the polymer nanocomposite were examined as afunction of electric eld.

scholarly journals Increased Electrical Conductivity of Carbon Nanotube Fibers by Thermal and Voltage Annealing

2021 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Varun Shenoy Gangoli ◽  
Chris J. Barnett ◽  
James D. McGettrick ◽  
Alvin Orbaek White ◽  
Andrew R. Barron
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Raman Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Separate Analysis ◽  
Sweet Spot ◽  
Electrical Conductor ◽  
X Ray ◽  
Resonant Raman ◽  
Carbon Nanotube Fibers

We report the effect of annealing, both electrical and by applied voltage, on the electrical conductivity of fibers spun from carbon nanotubes (CNTs). Commercial CNT fibers were used as part of a larger goal to better understand the factors that go into making a better electrical conductor from CNT fibers. A study of thermal annealing in a vacuum up to 800 °C was performed on smaller fiber sections along with a separate analysis of voltage annealing up to 7 VDC; both exhibited a sweet spot in the process as determined by a combination of a two-point probe measurement with a nanoprobe, resonant Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). Scaled-up tests were then performed in order to translate these results into bulk samples inside a tube furnace, with similar results that indicate the potential for an optimized method of achieving a better conductor sample made from CNT fibers. The results also help to determine the surface effects that need to be overcome in order to achieve this.

A closed-form model for estimating the effective thermal conductivities of carbon nanotube–polymer nanocomposites

2018 ◽  
Vol 233 (8) ◽  
pp. 2909-2919 ◽  
Author(s):  
Reza Moheimani ◽  
M Hasansade
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Closed Form ◽  
Polymer Nanocomposites ◽  
Micromechanical Model ◽  
Polymer Nanocomposite ◽  
Interfacial Thermal Resistance ◽  
Full Potential ◽  
Thermal Conductivities

This paper describes a closed-form unit cell micromechanical model for estimating the effective thermal conductivities of unidirectional carbon nanotube reinforced polymer nanocomposites. The model incorporates the typically observed misalignment and curvature of carbon nanotubes into the polymer nanocomposites. Also, the interfacial thermal resistance between the carbon nanotube and the polymer matrix is considered in the nanocomposite simulation. The micromechanics model is seen to produce reasonable agreement with available experimental data for the effective thermal conductivities of polymer nanocomposites reinforced with different carbon nanotube volume fractions. The results indicate that the thermal conductivities are strongly dependent on the waviness wherein, even a slight change in the carbon nanotube curvature can induce a prominent change in the polymer nanocomposite thermal conducting behavior. In general, the carbon nanotube curvature improves the nanocomposite thermal conductivity in the transverse direction. However, using the straight carbon nanotubes leads to maximum levels of axial thermal conductivities. With the increase in carbon nanotube diameter, an enhancement in nanocomposite transverse thermal conductivity is observed. Also, the results of micromechanical simulation show that it is necessary to form a perfectly bonded interface if the full potential of carbon nanotube reinforcement is to be realized.

Recent Advances in Polymer-Based Nanocomposites: A Brief Review

2021 ◽  
Vol 13 ◽  
Author(s):  
S. K. Parida
Keyword(s):  
Electrical Properties ◽  
Polymer Nanocomposites ◽  
Polymer Matrix ◽  
Polymer Nanocomposite ◽  
Review Article ◽  
Nanosized Particles ◽  
Mechanical And Electrical Properties ◽  
Potential Applications ◽  
Manufacturing Techniques ◽  
Host Polymer

: This presented review article is constructed to be an extensive source for polymer nanocomposite researchers covering the relation of structure with property, manufacturing techniques, and potential applications when a small number of nanosized particles are added to a host polymer matrix. The exceptional structural, mechanical, and electrical properties of polymer nanocomposites after the addition of inorganic solid nanoparticles are elucidated by the large surface area of doped nanoparticles that interact with host polymer matrices. Due to the generation of ideas, the conventional methods of preparation of polymer nanocomposites are made more interesting. Hence, this brief review presents a sketch of different synthesis techniques, characterization, applications, and safety concerns for polymer nanocomposites.

Mechanical and Electrical Properties of Carbon Nanotube / Polydimethylsiloxane Composites Yarn

2016 ◽  
Vol 11 (4) ◽  
pp. 155892501601100 ◽  
Author(s):  
Wei Liu ◽  
Fujun Xu ◽  
Nianhua Zhu ◽  
Shuang Wang
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Electrical Properties ◽  
Strain Sensors ◽  
Electromechanical Properties ◽  
Average Strength ◽  
Mechanical And Electrical Properties ◽  
Carbon Nano Tube ◽  
Droplet Infiltration

Carbon nano tube (CNT) yarn is an axially aligned CNT assembly. It has great potential many applications. In this study, the mechanical and electrical properties of the aerogel-spun CNT yarns and CNT/Polydimethylsiloxane (PDMS) composite yarns were investigated. The CNT/PDMS yarn was fabricated by droplet infiltration of PDMS solution into the aerogel-spun CNT yarn. The mechanical properties of the CNT/PDMS yarns were significantly improved with an average strength of 837.29 MPa and modulus of 3.66 GPa, over 100% improvement compared to the original CNT yarns. The electrical conductivity of the CNT/PDMS yarn increased from 1636 S/cm to 3555 S/cm. The electromechanical properties of CNT/PDMS yarns demonstrated that such CNT yarn could be suitable for strain sensors.

Electrical conductivity of multiwalled carbon nanotubes/polyester polymer nanocomposites

2016 ◽  
Vol 50 (23) ◽  
pp. 3283-3290 ◽  
Author(s):  
K Abazine ◽  
H Anakiou ◽  
M El Hasnaoui ◽  
MPF Graça ◽  
MA Fonseca ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Polymer Nanocomposites ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon

Comparative Study on Partial Discharge Characteristic in Polymer-Nanocomposite as Electrical Insulating Material

2013 ◽  
Vol 284-287 ◽  
pp. 62-66
Author(s):  
Wan Akmal Izzati ◽  
Mohd Shafanizam ◽  
Yanuar Z. Arief ◽  
Mohamad Zul Hilmey Makmud ◽  
Zuraimy Adzis ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Polymer Nanocomposites ◽  
Dielectric Breakdown ◽  
Breakdown Strength ◽  
Partial Discharge ◽  
Specific Area ◽  
Polymer Nanocomposite ◽  
Insulating Material ◽  
Weight Percentage ◽  
Experimental Works

Polymer nanocomposites have been attracting attention among researchers as electrical insulating application from energy storage to power delivery. However, partial discharge has always been a predecessor to major faults and problems in this field. In addition, there are a lot more to explore as the characteristic of partial discharge in nanocomposites is not clearly understood as well as the electrical properties of the nanocomposites. By adding a few amount of weight percentage (wt%) of the nano fillers, the physical, mechanical and electrical properties of polymers can be greatly enhanced. This is due to its amazing characteristic of having large specific area as a consequential from its nano sized particle that could enhance the electrical properties of the insulator. For instance, nano fillers in nanocomposites such as silica (SiO2), alumina (Al2O3) and titania (TiO2), play big role in providing good approach to increase dielectric breakdown strength and partial discharge resistance of nanocomposites. Such polymer nanocomposites will be reviewed thoroughly in this paper based on previous experimental works and studies. This paper provides reviews from related publications from year 1997 to 2011 including the results of experimental works which have been conducted by the authors with main focus on partial discharge characteristics in polymer nanocomposites, which demonstrates that research and utilization of polymer nanocomposites has well developed from past decades and will possess a high demand in future as electrical insulating material.

Preparation and Electrical Properties of the MWNT/Polymer Nanocomposite Fibers

2006 ◽  
Vol 963 ◽  
Author(s):  
Guan Wang ◽  
Zhongkui Tan ◽  
Xueqing Liu ◽  
Vladimir Samuilov ◽  
Michael Dudley
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Properties ◽  
Composite Nanofibers ◽  
Polymer Nanocomposite ◽  
Composite Fiber ◽  
Cooh Group ◽  
Temperature Dependent ◽  
Multiwalled Carbon ◽  
Functionalized Carbon Nanotubes ◽  
Nanocomposite Fibers

ABSTRACTAn oxidation method has been applied to functionalize multiwalled carbon nanotubes with carboxylic acid (-COOH) group. Functionalized carbon nanotubes (f-MWNT) were used for the fabrication of conducting nanocomposite fibers by electrospinning, in comparison with the composite nanofibers made of un-functionalized carbon nanotubes (u-MWNT). Our results showed that the addition of f-MWNTs into polymer solution could increase the compatibility of MWNTs with the polymer matrix, and thus result in composite nanofibers with uniform diameters. Alignment of the composite nanofibers was achieved by using a rotating drum as the collector. F-MWNTs were found to align parallel to the axis direction of the nanofibers. Temperature-dependent DC electrical properties of a single composite fiber were investigated by a two-probe method. It was shown that the conductivity of the material could be significantly improved above a percolation threshold. The conductivity could be of ten orders of magnitude higher than the pure PVAc.

Recent Developments in Multifunctional Nanocomposites Using Carbon Nanotubes

2010 ◽  
Vol 63 (5) ◽  
Author(s):  
Jacob M. Wernik ◽  
Shaker A. Meguid
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Properties ◽  
Polymer Nanocomposites ◽  
Health Monitoring ◽  
Future Trends ◽  
Theoretical Investigations ◽  
Monitoring Applications ◽  
Recent Developments ◽  
Thermal And Electrical Properties ◽  
Multifunctional Nanocomposites

This review summarizes the most recent advances in multifunctional polymer nanocomposites reinforced by carbon nanotubes and aims to stimulate further research in this field. Experimental and theoretical investigations of the mechanical, thermal, and electrical properties of carbon nanotubes and their composite counterparts are presented. This review identifies the processing challenges associated with this class of materials and presents techniques that are currently being adopted to address these challenges and their relative merits. This review suggests possible future trends, opportunities, and challenges in the field and introduces the use of these multifunctional nanocomposites in structural health monitoring applications.

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