scholarly journals Conductive silicone elastomers electrodes processable by screen printing

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Jose Enrico Q. Quinsaat ◽  
Iurii Burda ◽  
Ronny Krämer ◽  
Daniel Häfliger ◽  
Frank A. Nüesch ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Binary Mixture ◽  
Screen Printing ◽  
Electrode Materials ◽  
Filler Content ◽  
Dielectric Elastomer ◽  
Filler Loading ◽  
Conductive Composites ◽  
Dielectric Elastomer Actuators

Abstract Conductive inks consisting of graphene and carbon black conductive fillers into a polydimethylsiloxane (PDMS) matrix, which can be processed into thin films by screen printing are developed. The influence of filler composition and content on mechanical and electrical properties of the conductive composites is investigated. The best composites were evaluated as electrode material for dielectric elastomer actuators and for piezoelectric sensors. With increasing filler content, the electrical properties of the resulting composites of graphite nanoplates (GNPs) or a binary mixture of GNPs and carbon black (CB) with PDMS (Mw = 139 kg/mol) are enhanced. Hence, PDMS composites filled with GNPs (42 wt.%) or a binary mixture of GNPs/CB (300/150 ratio, 30 wt.% of total filler loading) exhibited constant contact resistance values of 0.5 and 5 Ω determined in life-cycle test, respectively, thus rendering them suitable as electrode materials for piezosensors. On the other hand, dielectric elastomer actuators require more flexible electrode materials, which could be tuned by varying the polymer molecular weight and by reducing the filler content. Therefore, a composite consisting of PDMS (Mw = 692 kg/mol) and a binary filler mixture of GNPs/CB (150/75 ratio, 18 wt.% of total filler loading) was used for producing the electrodes of dielectric elastomer transducers (DETs). The produced DETs with different electrode thicknesses were characterized in terms of their performance. The negligible hysteresis of the electrode materials is favorable for sensor and actuator applications.

New electrode materials for dielectric elastomer actuators

2007 ◽  
Author(s):  
Wei Yuan ◽  
Tuling Lam ◽  
James Biggs ◽  
Liangbing Hu ◽  
Zhibin Yu ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Dielectric Elastomer ◽  
Dielectric Elastomer Actuators

AC Electrical Properties of Titanate-Linkcoupled Carbon Black Filled Polypropylene Composites

2012 ◽  
Vol 217-219 ◽  
pp. 644-651
Author(s):  
Nai Xiu Ding ◽  
Li Li Wang ◽  
Mao Sheng Zhan ◽  
Liang Liu ◽  
Shuai Feng Xu
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Volume Resistivity ◽  
Dissipation Factor ◽  
Experimental Result ◽  
Filler Concentration ◽  
Polypropylene Composites ◽  
Conductive Composites ◽  
Carbon Black Concentration ◽  
Ac Electrical Properties

In this paper, Carbon black was activated using titanate-type coupling agent, and then filled into polypropylene to prepare conductive composites, whose alternating current (AC) electrical properties, including impendence Z, phase angel θ, dielectric constantε and dissipation factor tgδ that is a function of frequency and carbon black concentration were investigated by AC impedance spectroscopy. The percolation threshold of 5wt% carbon black concentration was obtained from the experimental result of volume resistivity for the conductive composites. It was found that the variation of AC electrical properties, which is a function of frequency, was dramatic and dependent on the filler concentration. It was also found that dependence of the real and the imaginary parts of impendence on frequency decreased with the increased concentration of carbon black, while the phase angle, dielectric constant and dissipation factor increased. The AC electrical properties were given based on the conductive network model and the corresponding equivalent circuit were concluded

scholarly journals Thermal, Morphological, Electrical Properties and Touch-Sensor Application of Conductive Carbon Black-Filled Polyamide Composites

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3103
Author(s):  
Valentina Brunella ◽  
Beatrice Gaia Rossatto ◽  
Domenica Scarano ◽  
Federico Cesano
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Carbon Black ◽  
Polymer Composites ◽  
Thermal Analyses ◽  
Polyamide 66 ◽  
Electrical Measurements ◽  
Scanning Calorimetry ◽  
Carbon Filler ◽  
Conductive Composites

Polyamide 66 (PA66) is a well-known engineering thermoplastic polymer, primarily employed in polymer composites with fillers and additives of different nature and dimensionality (1D, 2D and 3D) used as alternatives to metals in various technological applications. In this work, carbon black (CB), a conductive nanofiller, was used to reinforce the PA66 polymer in the 9–27 wt. % CB loading range. The reason for choosing CB was intrinsically associated with its nature: a nanostructured carbon filler, whose agglomeration characteristics affect the electrical properties of the polymer composites. Crystallinity, phase composition, thermal behaviour, morphology, microstructure, and electrical conductivity, which are all properties engendered by nanofiller dispersion in the polymer, were investigated using thermal analyses (thermogravimetry and differential scanning calorimetry), microscopies (scanning electron and atomic force microscopies), and electrical conductivity measurements. Interestingly, direct current (DC) electrical measurements and conductive-AFM mapping through the samples enable visualization of the percolation paths and the ability of CB nanoparticles to form aggregates that work as conductive electrical pathways beyond the electrical percolation threshold. This finding provides the opportunities to investigate the degree of filler dispersion occurring during the transformation processes, while the results of the electrical properties also contribute to enabling the use of such conductive composites in sensor and device applications. In this regard, the results presented in this paper provide evidence that conductive carbon-filled polymer composites can work as touch sensors when they are connected with conventional low-power electronics and controlled by inexpensive and commercially available microcontrollers.

Effect of Carbon Black Surface Treatment on the AC Electrical Properties of PP-Based Composites

2013 ◽  
Vol 712-715 ◽  
pp. 182-189
Author(s):  
Nai Xiu Ding ◽  
Li Li Wang ◽  
Pei Yan Zuo ◽  
Yong Li ◽  
Guang Ye Liu
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Carbon Black ◽  
Conduction Mechanism ◽  
Conduction Model ◽  
Conductive Composites ◽  
Carbon Black Surface ◽  
Black Surface ◽  
Ac Electrical Properties ◽  
Ac Conduction

Carbon black was first activated by grafting and coupling respectively. Then the grafted carbon black, coupled carbon black, together with the unmodified carbon black was filled into polypropylene to prepare three kinds of composites respectively. The measurements of Fourier Transform Infrared Spectroscopy (FTIR) and alternating current (AC) electrical properties were performed on the composites. And the effect of CB activation on the AC electrical properties was analyzed. Seen from the result of FTIR spectra it can be found that different groups are bonded to the surface of carbon black after activation. For the corresponding conductive composites,it was found that the value of percolation threshold decreases and the electrical conductivity improves consequently after the carbon black activation. The influence of carbon black activation on the AC electrical properties of the composites and their variation with frequency was analyzed. The AC conduction mechanism was discussed and the conduction model was constructed based on the analysis.

Study on Electrical Properties of Activated Carbon Black Filled Polypropylene Composites Using Impedance Analyzer

2013 ◽  
Vol 712-715 ◽  
pp. 175-181 ◽  
Author(s):  
Nai Xiu Ding ◽  
Li Li Wang ◽  
Pei Yan Zuo ◽  
Yong Li ◽  
Guang Ye Liu
Keyword(s):  
Activated Carbon ◽  
Electrical Properties ◽  
Carbon Black ◽  
Dissipation Factor ◽  
Conductive Network ◽  
Impedance Analyzer ◽  
Polypropylene Composites ◽  
Conductive Composites ◽  
Carbon Black Concentration ◽  
Ac Electrical Properties

Carbon black was activated and then filled into polypropylene to prepare conductive composites, of which the electrical properties, including impedance Z, phase angelθ and dissipation factor tgδ, as a function of frequency and carbon black concentration were investigated using impedance analyzer. The percolation threshold of 5wt% carbon black concentration was obtained. It was found that the variation of AC electrical properties as a function of frequency is dramatic and dependent on the carbon black concentration. It was also found that dependence of the real part and the imaginary part of impedance on frequency decreases with the increased concentration of carbon black, while that of phase angle and dissipation factor increases. Based on the corresponding results, the conductive network model and the corresponding equivalent circuit were constructed.

scholarly journals Influence of Pore Size on the Optical and Electrical Properties of Screen PrintedTiO2Thin Films

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Dinfa Luka Domtau ◽  
Justus Simiyu ◽  
Elijah Omollo Ayieta ◽  
Godwin Mwebeze Asiimwe ◽  
Julius Mwakondo Mwabora
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Electrical Properties ◽  
Carbon Black ◽  
Pore Size ◽  
Significant Variation ◽  
Screen Printing ◽  
Band Gaps ◽  
Optical And Electrical Properties ◽  
Screen Printing Method

Influence of pore size on the optical and electrical properties of TiO2thin films was studied. TiO2thin films with different weight percentages (wt%) of carbon black were deposited by screen printing method on fluorine doped tin oxide (FTO) coated on glass substrate. Carbon black decomposed on annealing and artificial pores were created in the films. All the films were 3.2 µm thick as measured by a surface profiler. UV-VIS-NIR spectrophotometer was used to study transmittance and reflectance spectra of the films in the photon wavelength of 300–900 nm while absorbance was studied in the range of 350–900 nm. Band gaps and refractive index of the films were studied using the spectra. Reflectance, absorbance, and refractive index were found to increase with concentrations of carbon black. There was no significant variation in band gaps of films with change in carbon black concentrations. Transmittance reduced as the concentration of carbon black in TiO2increased (i.e., increase in pore size). Currents and voltages (I-V) characteristics of the films were measured by a 4-point probe. Resistivity (ρ) and conductivity (σ) of the films were computed from theI-Vvalues. It was observed that resistivity increased with carbon black concentrations while conductivity decreased as the pore size of the films increased.

Processability Behaviour of Dual Filler Systems Reinforced Epoxised Natural Rubber

2014 ◽  
Vol 974 ◽  
pp. 195-198
Author(s):  
Teku Zakwan Zaeimoedin ◽  
Mazlina Mustapha Kamal
Keyword(s):  
Carbon Black ◽  
Natural Rubber ◽  
Filler Content ◽  
Processing Condition ◽  
Filler Loading ◽  
Flow Behaviour ◽  
Viscosity Data ◽  
Processing Conditions ◽  
Melt Mixing ◽  
Testing Instruments

Rheological studies of polymers are of great importance in optimizing the processing conditions and in designing processing equipments like injection molding machines, extruders, and dies required for various products. Melt rheological studies give us valuable viscosity data that will be helpful in optimizing the processing conditions. Parameters like melt viscosity as a function of shear rate or shear stress and temperature have become more and more important. Previous study indicated that the flow behaviour of the compound depends on the filler loading. Lesser elastic torque was found with compound containing lower filler content as compared to higher filler content. In this work, effect of dual filler, based on Carbon Black / Silica filled Epoxidised Natural Rubber (ENR) compound was investigated. A total of 80phr of filler content based on passenger tyre tread formulation was used in the experiment. The compounds were prepared by melt mixing in tangential type of an internal mixer. The rheological and the processability properties of the compounds were determined using three different testing instruments namely Capillary Rheometer, Mooney viscometer and Rubber Process Analyzer (RPA). A variation of shear rates (ranging from low to high) was performed, in order to better reflect the actual processing condition in rubber manufacturing. It was found that ENR mix with ratio silica to carbon black 70:10 exhibited the best flow behaviour and processability properties as compared to control and other mixes.

scholarly journals A review on the direct electroplating of polymeric materials

2021 ◽  
Author(s):  
Piotr Augustyn ◽  
Piotr Rytlewski ◽  
Krzysztof Moraczewski ◽  
Adam Mazurkiewicz
Keyword(s):  
Electrical Properties ◽  
Nickel Nanoparticles ◽  
Filler Content ◽  
Polymeric Materials ◽  
Polymer Materials ◽  
Review Of The Literature ◽  
Conductive Composites ◽  
Deposited Metal ◽  
Metal Layers ◽  
Contact Electrode

AbstractThis work is a review of the literature on the possibilities for electroplating of polymer materials. Methods of metalizing polymers and their composites were presented and discussed. Information from various publications on the electrical properties of polymers and polymer composites was collected and discussed. The most important results on the electroplating of conductive polymers and conductive composites were presented and compared. This work especially focuses on the electrical conductivity of polymer materials. The main focus was the efficiency of metal electrodeposition. Based on the analyzed publications, it was found that electrically deposited metal layers on conductive polymeric materials show discontinuity, considerable roughness, and different layer thickness depending on the distance from the contact electrode. The use of metal nanoparticles (AgNWs) or nickel nanoparticles (NiNPs) as a filler enables effective metallization of the polymer composite. Due to the high aspect ratio, it is possible to lower the percolation threshold with a low filler content in the polymer matrix. The presented review reveals many of the problems associated with the effectiveness of the electroplating methods. It indicates the need and direction for further research and development in the field of electroplating of polymer materials and modification of their electrical properties.

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