scholarly journals Controlling the dynamic percolation of carbon nanotube based conductive polymer composites by addition of secondary nanofillers: The effect on electrical conductivity and tuneable sensing behaviour

2013 ◽  
Vol 74 ◽  
pp. 85-90 ◽  
Author(s):  
Emiliano Bilotti ◽  
Han Zhang ◽  
Hua Deng ◽  
Rui Zhang ◽  
Qiang Fu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Polymer Composites ◽  
Conductive Polymer ◽  
Conductive Polymer Composites

Development of Carbon Nanotube Reinforced Conductive Polymer Composites for PEM Fuel Cells

2012 ◽  
Vol 729 ◽  
pp. 260-265
Author(s):  
M. Olah ◽  
Ferenc Ronkay
Keyword(s):  
Electrical Conductivity ◽  
Polymer Composites ◽  
Filler Content ◽  
Conductive Polymer ◽  
High Viscosity ◽  
Pem Fuel Cells ◽  
Conductive Polymer Composites ◽  
Multi Walled Carbon Nanotubes ◽  
Matrix Compound ◽  
Walled Carbon Nanotubes

Investigation of conductive polymer composites have been carried out using polypropylene (PP) and polyphenylene sulfonate (PPS) for matrix compound and graphite, carbon black and multi walled carbon nanotubes (MWCNT) for fillers. The comparison of these matrix materials with respect to the resulting electrical conductivity were investigated in depth. The effect of quantity of nanotubes and their dispersion on electrical conductivity and formability was also investigated. It has been found that PPS composites show much higher conductivity, however the high temperature needed for forming, and high viscosity in case of high filler content (50 wt% <) make the processing difficult, therefore the injection molding of the resulting material is currently not possible. Furthermore in contradiction to the literature the addition of MWCNT did not raise the conductivity significantly, therefore the focus have been kept on filler content instead.

Progress in Conductive-Polymer Carbon Nanotube Composites

2016 ◽  
Vol 848 ◽  
pp. 13-17
Author(s):  
Run Run Xu ◽  
Xiang Hong Wu ◽  
Yun Long Han
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Polymer Composites ◽  
Conductive Polymer ◽  
Research Direction ◽  
High Price ◽  
Inorganic Filler ◽  
Conductive Polymer Composites ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

Carbon nanotube (CNT) has been widely used as a kind of conductive inorganic filler in composites due to its excellent mechanical properties, thermal properties and electrical properties. Unfortunately, a deal of CNT is needed because it tends to agglomerate in matrix polymers. And therefore the researchers need to explore appropriate methods to decrease the usage of CNT for its high price. This paper summaries the recent development progress in carbon nanotube filled conductive polymer composites, in aspects of the approaches how to reduce the usage of CNT and application of biodegradable CNT-polymer composites. In addition, the future developing research direction in conductive polymer composites filled with carbon nanotube was indicated.

scholarly journals Mechanically Enhanced Electrical Conductivity of Polydimethylsiloxane-Based Composites by a Hot Embossing Process

2018 ◽  
Author(s):  
Xiaolong Gao ◽  
Yao Huang ◽  
Xiaoxiang He ◽  
Xiaojing Fan ◽  
Ying Liu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Percolation Threshold ◽  
Polymer Composites ◽  
Flexible Electronics ◽  
Conductive Polymer ◽  
Hot Embossing ◽  
Electrical Percolation ◽  
Flexible Polymer ◽  
Conductive Polymer Composites ◽  
Conducting Filler

Electrically conductive polymer composites are in high demand for modern technologies, however, the intrinsic brittleness of conducting conjugated polymers and the moderate electrical conductivity of engineering polymer/carbon composites have highly constrained their applications. In this work, super high electrical conductive polymer composites were produced by a novel hot embossing design. The polydimethylsiloxane (PDMS) composites containing short carbon fiber (SCF) exhibited an electrical percolation threshold at 0.45 wt%, and reached a saturated electrical conductivity of 49 S/m at 8 wt% of SCF. When reduced the sample thickness from 1.0 mm to 0.1 mm by the hot embossing process, a compression-induced percolation threshold occurred at 0.3 wt%, while the electrical conductivity was further enhanced to 378 S/m at 8 wt% SCF. Furthermore, the additional of a second nanofiller of 1 wt%, such as carbon nanotube or conducting carbon black further increased the electrical conductivity of the PDMS/SCF (8 wt%) composites to 909 S/m and 657 S/m, respectively. The synergy of the densified conducting filler network by the mechanical compression and the hierarchical micro-/nanoscale filler approach has realize super high electrical conductive yet mechanical flexible polymer composites for modern flexible electronics applications.

Effect of Electrical Conductivity and Physical Performance about Vulcanization System in Conductive Silicon Rubber

2014 ◽  
Vol 577 ◽  
pp. 39-43
Author(s):  
Yue Xian Zhang ◽  
Bin Li
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Composite Materials ◽  
Polymer Composites ◽  
Conductive Polymer ◽  
Research Progress ◽  
Silicon Rubber ◽  
Conductive Polymer Composites ◽  
Rubber Composite ◽  
Influence Degree

Vulcanization methods of conductive silicon rubber are described in this paper. Several common vulcanization agents are also be introduced. The conductivity and mechanical properties of the conductive silicon rubber composite materials are effected by vulcanization systems. The influence degree is introduced by respectively using different vulcanization method, vulcanizing time and vulcanizing temperature. The research progress of vulcanization system of conductive polymer composites is elaborated.

scholarly journals Dielectrical properties of composites LDPE+CB

2010 ◽  
Vol 64 (3) ◽  
pp. 187-191
Author(s):  
Blanka Skipina ◽  
Dusko Dudic ◽  
Dusan Kostoski ◽  
Jablan Dojcilovic
Keyword(s):  
Electrical Conductivity ◽  
Polymer Composites ◽  
Conductive Polymer ◽  
Dissipation Factor ◽  
Filler Concentration ◽  
Electrical Insulator ◽  
Conductive Polymer Composites ◽  
Wide Range ◽  
Filler Particles ◽  
Dielectrical Properties

There is currently great interest in the technological properties of conductive polymer composites because their cost-performance balance. They have a wide range of industrial applications -in anti-static materials, self regulating heaters, current overload and overheating protection devices, and materials for electromagnetic radiation shielding. Measurements of the electrical properties of polymer composites are one of the most convenient and sensitive methods for studying polymer structure. A polymer composite differs substantially from a free polymer in a wide range of properties. The presence of filler affects both the electrical, as well as mechanical properties. One of the most important characteristics of conductive polymer composites is that their electrical conductivity increases nonlinearly with the increase of the concentration of filler particles. When the concentration of filler particles reaches a certain critical value, a drastic transition from an electrical insulator to a conductor is exhibited. This conductivity behavior resulting in a sudden insulator-conductor transition is ascribed to a percolation process, and the critical filler concentration at which the conductivity jump occurs is called ?percolation threshold?. In the past few years, a lot of studies have been carried out to analyze the percolation phenomenon and mechanisms of the conductive behavior in conductive polymer composites. It has been established that the electrical conductivity of conductive polymer composites uncommonly depends on the temperature. Some of such composites show a sharp increase and/or decrease in electrical conductivity at specific temperatures. The conductive temperature coefficient (CTC) of conductive polymer composites has been widely investigated. In these work we investigated how concentration of the CB affects the dielectrical properties of the composite LDPE+CB. The ac electrical conductivity, ?ac, for such composites was measured. The temperature and frequency dependence of the dissipation factor were analyzed. It was found that the ac conductivity and dissipation factor were highly affected by the concentration of the filler.

scholarly journals The Influence of Compounding Parameters on the Electrical Conductivity of LDPE/Cu Conductive Polymer Composites (CPCs)

2021 ◽  
Vol 2080 (1) ◽  
pp. 012008
Author(s):  
Farah Badrul ◽  
Khairul Anwar Abdul Halim ◽  
MohdArif Anuar Mohd Salleh ◽  
Azlin Fazlina Osman ◽  
Nor Asiah Muhamad ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Polymer Composites ◽  
Low Cost ◽  
Conductive Polymer ◽  
Conductive Filler ◽  
Filler Loading ◽  
Electrically Conductive ◽  
Statistical Software ◽  
Conductive Polymer Composites ◽  
The Matrix

Abstract Low-linear density (LDPE) and copper (Cu) were used as main polymer matrix and conductive filler in order to produce electrically conductive polymer composites (CPC). The selection of the matrix and conductive filler were based on their due to its excellence properties, resistance to corrosion, low cost and electrically conductive. This research works is aimed to establish the effect of compounding parameter on the electrical conductivity of LDPE/Cu composites utilising the design of experiments (DOE). The CPCs was compounded using an internal mixer where all formulations were designed by statistical software. The scanning electron micrograph (SEM) revealed that the Cu conductive filler had a flake-like shape, and the electrical conductivity was found to be increased with increasing filler loading as measured using the four-point probe technique. The conductivity data obtained were then analysed by using the statistical software to establish the relationship between the compounding parameters and electrical conductivity where it was found based that the compounding parameters have had an effect on the conductivity of the CPC.

Three-dimensional porous stretchable and conductive polymer composites based on graphene networks grown by chemical vapour deposition and PEDOT:PSS coating

2015 ◽  
Vol 51 (15) ◽  
pp. 3169-3172 ◽  
Author(s):  
Mengting Chen ◽  
Shasha Duan ◽  
Ling Zhang ◽  
Zhihui Wang ◽  
Chunzhong Li
Keyword(s):  
Electrical Conductivity ◽  
Polymer Composites ◽  
Vapour Deposition ◽  
Conductive Polymer ◽  
Three Dimensional ◽  
Chemical Vapour ◽  
Electrical Performance ◽  
Retention Capacity ◽  
Cvd Graphene ◽  
Conductive Polymer Composites

The porous CVD graphene–PEDOT:PSS–PDMS composite has outstanding electrical performance, including higher electrical conductivity and better resistance retention capacity than the CVD graphene–PDMS composite.

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