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

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.

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.

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.

scholarly journals Electrical properties of epoxy composites based on carbon black

2021 ◽  
Vol 340 ◽  
pp. 01052
Author(s):  
Artyom A. Shestakov ◽  
Nikita I. Lapekin ◽  
Andrey E. Brester ◽  
Evgenii A. Maksimovskii ◽  
Arina V. Ukhina ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Epoxy Composites ◽  
Frequency Range ◽  
Maximum Value ◽  
Ac Electrical Properties

In this work, AC electrical properties of epoxy composites based on carbon black (CB) were determined depending on the loading of filler. The measurements were carried out within a frequency range 20 Hz – 1 MHz. The loading of carbon black was 0–5 wt.% in composites. The conductivity increased when increasing the content of carbon black and the maximum values were observed at 5 wt.% CB. The maximum value of permittivity was at 0.75 wt.% CB and it can be considered as percolation threshold.

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.

The Fluidity and AC Impedance of Polypropylene Composites Filled with Activated Carbon Black

2012 ◽  
Vol 217-219 ◽  
pp. 634-643
Author(s):  
Nai Xiu Ding ◽  
Li Li Wang ◽  
Mao Sheng Zhan ◽  
Lei Li ◽  
Shuai Feng Xu
Keyword(s):  
Fourier Transform ◽  
Activated Carbon ◽  
Infrared Spectroscopy ◽  
Carbon Black ◽  
Melt Flow Index ◽  
Ac Impedance ◽  
Flow Index ◽  
Carbon Black Content ◽  
Polypropylene Composites ◽  
Conductive Composites

In this paper, carbon black was activated by grafting and coupling respectively. Then the grafted carbon black, coupled carbon black, together with the unmodified carbon black were filled into polypropylene to prepare three kinds of composites respectively. The measurements of Fourier Transform Infrared Spectroscopy (FTIR), melt flow index, and alternating current (AC) impedance were performed on the composites. From the FTIR spectra, it was shown that different groups are bonded to the surface of carbon black after activating treatment For the corresponding conductive composites，it was found that the variation of fluidity with carbon black content and temperature changed after the carbon black activation. The influence of carbon black activation on the AC impedance and fluidity of the composites was analyzed. The scheme describing the interaction between carbon black and polypropylene in composites was given according to the results mentioned above.

scholarly journals Filler Dispersion in Hyperbranched Polyisobutylene

2004 ◽  
Vol 77 (2) ◽  
pp. 372-379 ◽  
Author(s):  
C. M. Roland ◽  
C. G. Robertson ◽  
L. Nikiel ◽  
J. E. Puskas
Keyword(s):  
Carbon Black ◽  
Volume Resistivity ◽  
Linear Polymer ◽  
Payne Effect ◽  
Dynamic Mechanical ◽  
Resistivity Measurements ◽  
Mechanical Hysteresis ◽  
Carbon Black Concentration ◽  
Filler Dispersion ◽  
Filler Network

Abstract The microdispersion of carbon black filler in linear and hyperbranched polyisobutylene (PIB) was assessed from dynamic mechanical and volume resistivity measurements. While no significant differences were observed in the carbon black concentration necessary for formation of a filler network, in comparison to the linear polymer, the highly branched PIB was found to have substantially more carbon black agglomeration. This occurs despite its higher viscosity, due to the relative inaccessibility of large portions of the molecule, as a result of the profuse treelike branching. The consequence is more extensive interaggregate interaction, and thus a larger Payne effect and greater mechanical hysteresis.

scholarly journals Electrical Conductivity Modeling of Polypropylene Composites Filled with Carbon Black and Acetylene Black

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Abdelhafid Merzouki ◽  
Naceredine Haddaoui
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Acetylene Black ◽  
Filler Concentration ◽  
Melt Mixing ◽  
Entire Concentration Range ◽  
Polypropylene Composites ◽  
Boltzman Equation ◽  
Good Agreement

Composites of polypropylene filled with carbon black or acetylene black at different concentrations were prepared by melt mixing followed by compression molding. The influences of filler type and filler concentration on the composites conductivity were studied. It was found that the percolation threshold is located at a lower concentration in composites filled with the acetylene black, than that of the composites filled with carbon black. The model of Mamunya gives a fairly good agreement in the evaluation of the conductivity of polymeric composites loaded with carbon black or acetylene black, beyond the percolation threshold. The Boltzman equation was adopted to develop a model that represents more faithfully all results obtained. The expressions of the electrical conductivity, calculated with the model developed, are in good agreement with experimental results for the entire concentration range studied in linear or semilogarithmic scale.

Electron transport and ac electrical properties of carbon black polymer composites

2001 ◽  
Vol 34 (17) ◽  
pp. 2699-2707 ◽  
Author(s):  
K-M Jäger ◽  
D H McQueen ◽  
I A Tchmutin ◽  
N G Ryvkina ◽  
M Klüppel
Keyword(s):  
Electron Transport ◽  
Electrical Properties ◽  
Carbon Black ◽  
Polymer Composites ◽  
Ac Electrical Properties
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