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.

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

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 56 ◽  
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 ◽  
Electrically Conductive ◽  
Electrical Percolation ◽  
Flexible Polymer ◽  
Conductive Polymer Composites

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 reducing the sample thickness from 1.0 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 addition 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-/nano-scale filler approach has realized super high electrically conductive, yet mechanically flexible, polymer composites for modern flexible electronics applications.

Electrical conductivity and rheological properties of carbon black based conductive polymer composites prior to and after annealing

2021 ◽  
pp. 096739112110012
Author(s):  
Qingsen Gao ◽  
Jingguang Liu ◽  
Xianhu Liu
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Rheological Properties ◽  
Network Formation ◽  
Loss Modulus ◽  
Conductive Polymer ◽  
Complex Viscosity ◽  
Electrical Percolation ◽  
Electrical Percolation Threshold

The effect of annealing on the electrical and rheological properties of polymer (poly (methyl methacrylate) (PMMA) and polystyrene (PS)) composites filled with carbon black (CB) was investigated. For a composite with CB content near the electrical percolation threshold, the formation of conductive pathways during annealing has a significant impact on electrical conductivity, complex viscosity, storage modulus and loss modulus. For the annealed samples, a reduction in the electrical and rheological percolation threshold was observed. Moreover, a simple model is proposed to explain these behaviors. This finding emphasizes the differences in network formation with respect to electrical or rheological properties as both properties belong to different physical origins.

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.

Novel conductive polymer composites based on poly(butylene terephtalate) filled with carbon fibers

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Liubov Bardash ◽  
Gisèle Boiteux ◽  
Gérard Seytre ◽  
Chady Hakme ◽  
Nicolas Dargère ◽  
...  
Keyword(s):  
Carbon Fibre ◽  
Percolation Threshold ◽  
Polymer Composites ◽  
Carbon Fibers ◽  
Conductive Polymer ◽  
Processing Conditions ◽  
Butylene Terephthalate ◽  
Conductive Polymer Composites ◽  
Cyclic Butylene Terephthalate ◽  
Conducting Polymer Composites

AbstractPoly(butylene terephthalate) (cPBT) synthesized from cyclic Butylene Terephthalate oligomers (CBT) was used as a matrix for carbon fibre (CF) conducting polymer composites (CPC). DSC, rheological studies and measurements of torque of CBT/CF were performed in order to optimise the processing conditions of CPC. DC and AC measurements were carried out for these composites and have shown a low percolation threshold for cPBT/CF.

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.

Variation in electrical conductivity of conductive polymer composites under shock wave

2015 ◽  
Vol 91 ◽  
pp. 26-34 ◽  
Author(s):  
Jian-kang Chen ◽  
Jin-tao Lei ◽  
Ming-hua Zhang ◽  
Shu-lin Bai
Keyword(s):  
Shock Wave ◽  
Electrical Conductivity ◽  
Polymer Composites ◽  
Conductive Polymer ◽  
Conductive Polymer Composites

Preparation of Binary Conductive Polymer Composites with Very Low Percolation Threshold by Latex Blending

2003 ◽  
Vol 24 (15) ◽  
pp. 889-893 ◽  
Author(s):  
Ji Wen Hu ◽  
Ming Wei Li ◽  
Ming Qiu Zhang ◽  
Ding Shu Xiao ◽  
Gen Shui Cheng ◽  
...  
Keyword(s):  
Percolation Threshold ◽  
Polymer Composites ◽  
Conductive Polymer ◽  
Conductive Polymer Composites
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