Electrical properties of polyethylene and carbon black particle blends prepared by gelation/crystallization from solution

Bin, Yuezhen; Xu, Chunye; Zhu, Dan; Matsuo, Masaru

doi:10.1016/s0008-6223(01)00173-7

Cited by 56 publications

(43 citation statements)

References 8 publications

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“…If the carbon fillers obtain an irregular shape, such as branches or fibers with a large ratio of length and diameter, they have high structures, providing full connection of conductive particles. Some SEM photos of CB and CNT composites published in our former work 24,25 verify our assumption here that CB is an aggregation of ball-like grains and CNT demonstrates a high structure with morphology of three dimensional continuous networks. In our observation, we find that the lower the structure of the carbons in the polymer matrix, the higher the value of l. The CNT, as for its special geometrical shape, appears to be a typical example of highstructured carbon fillers, and its morphological features in assembling manners apparently result in its effective connecting of the conductors, thus behave large effective volume in the composite.…”

Section: Resultssupporting

confidence: 79%

Electrical conducting behaviors in polymeric composites with carbonaceous fillers

Zhu

Bin

Matsuo

2007

J Polym Sci B Polym Phys

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Several kinds of polymer composites with carbonaceous fillers such as carbon black (CB), vapor-grown carbon fiber (CF), and carbon nanotube (CNT) are prepared by a gelation/crystallization process or a melt mixing method. The electrical phenomena, changes of electrical conductivities with different filler's type, filler's concentration and temperatures, and the mechanism of electron transport in these carbon-filled polymer composites are directly influenced by the geometric grain shape and aggregating morphology of the fillers dispersed in the polymer matrix. For the composites of CB and CF, long-range macroscopic conduction are governed by the percolation phenomenon, the conduction is behaved through the conductive path formed by the conductors' contacting, and the thermal expansion changes the physical dimensions of the entire electrical network and leads to the changes in the electrical phenomenon. Microscopic conduction between conductive elements is influenced by the tunneling barrier or tunneling voltage, which varies with the temperature change, explaining the apparent observation of the temperature dependence of the composites. In comparison with fillers of CB and CF, the CNT performs unique electric properties for their nonspherical geometry and morphology as a three-dimensional network (high structures), which has been visually proved by SEM photos in our former research, leading to the percolation threshold lower than 1% in the volume fraction and much less temperature dependence in its composites.

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Section: Resultssupporting

confidence: 79%

Electrical conducting behaviors in polymeric composites with carbonaceous fillers

Zhu

Bin

Matsuo

2007

J Polym Sci B Polym Phys

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“…In previous papers [7][8][9], the significant PTC effect was reported for LMWPE-UHMWPE-CB blends prepared by the gelation/crystallization from dilute solution, in which LMWPE/UHMWPE composition was 9/ 1 and CB content within the blend was 6.5 vol%. The PTC effect of the specimen prepared by the gelation/ crystallization was much better than that of the specimen prepared by kneading method in molten state [3][4][5][6][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 92%

“…To give conductive properties to polymers, carbon black (CB) [1][2][3][4][5][6][7][8][9], carbon fibers (CF) [10,11] and some metal powders [12] have been utilized as conductive filler. Among these electrically conducting composites, some composites show a sharp resistivity increase when the temperature close with the polymer melting point.…”

Section: Introductionmentioning

confidence: 99%

Positive temperature coefficient effect of LMWPE–UHMWPE blends filled with short carbon fibers

Xiang

Ishikawa

Bin

et al. 2004

Carbon

129

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“…Compared with organic and inorganic vapor-sensing materials, organic/inorganic (O/L) composites have better film forming properties, uniformity, gas-sensitivity, and selectivity (Song et al 2012). Of all the inorganic conducting fillers such as carbon black (CB), graphite powder, and carbon nanotubes (CN), filled polymer composite is one of the most common O/L composites and has been studied as both a positive temperature coefficient (PTC) material and a gas-sensing material (Bin et al 2002). In principle, the working mechanism of the electrical response of composites to vapors is similar to that of the PTC effect.…”

Section: Introductionmentioning

confidence: 99%

Conducting Graphite/Cellulose Composite Film as a Candidate for Chemical Vapor-Sensing Material

Liu

Qian

et al. 2014

BioResources

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A type of conductive graphite/cellulose composite film used for chemical vapor-sensing material was prepared at room temperature in the ionic liquid 1-butyl-3-methylimidazolium chloride ([BMIm]Cl). Graphite was pretreated with both oxidation and reduction processes. Due to the use of N,N-carbonyldiimidazole (CDI), as a covalent cross-linking agent in [BMIm]Cl, there were limited chemical bonds between the graphite and cellulose. The composite film was analyzed using Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XRD). When these conducting films were exposed to certain organic vapors, their electrical resistances quickly changed, showing gas sensitivity. The percolation threshold of the conducting film was about 5 wt%. The gas-sensing behavior of these films in solvent were the opposite of those gas-sensing materials based on a non-polar polymer matrix. A typical negative vapor coefficient (NVC) was observed when the film was placed in polar organic solvents such as methanol, ethanol, and acetone.

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Electrical properties of polyethylene and carbon black particle blends prepared by gelation/crystallization from solution

Cited by 56 publications

References 8 publications

Electrical conducting behaviors in polymeric composites with carbonaceous fillers

Electrical conducting behaviors in polymeric composites with carbonaceous fillers

Positive temperature coefficient effect of LMWPE–UHMWPE blends filled with short carbon fibers

Conducting Graphite/Cellulose Composite Film as a Candidate for Chemical Vapor-Sensing Material

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