PTC Effect of Conductive Composites Based on Resin Mixed with Carbon Nanoparticle

2017 ◽  
pp. 561-567
Author(s):  
Mengmeng Liang ◽  
Qichao Hou ◽  
Ruping Liu ◽  
Xudong Wu ◽  
Wei Wang ◽  
...  
Keyword(s):  
Carbon Nanoparticle ◽  
Ptc Effect ◽  
Conductive Composites

scholarly journals Synthesis of a Novel Semi-Conductive Composites Doping with La0.8Sr0.2MnO3 for Excellent Electric Performance for HVDC Cable

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 809 ◽  
Author(s):  
Hongxia Yin ◽  
Yingcao Cui ◽  
Yanhui Wei ◽  
Chuncheng Hao ◽  
Qingquan Lei
Keyword(s):  
Electric Field ◽  
Space Charge ◽  
Charge Injection ◽  
Inhibitory Effect ◽  
Uniform Electric Field ◽  
Positive Temperature ◽  
Ptc Effect ◽  
Suppression Effect ◽  
Conductive Composites ◽  
Conductive Particles

The semi-conductive layer located between the wire core and the insulation layer in high voltage direct current (HVDC) cable plays a vital role in uniform electric field and affecting space charges behaviors. In this work, the research idea of adding ionic conductive particles to semi-conductive materials to improve the conductive network and reduce the energy of the moving charge inside it and to suppress charge injection was proposed. Semi-conductive composites doped with different La0.8Sr0.2MnO3 (LSM) contents were prepared. Resistivity at different temperatures was measured to investigate the positive temperature coefficient (PTC) effect. Pulse electro-acoustic (PEA) method and thermal-stimulation depolarization currents (TSDC) tests of the insulation layers were carried out. From the results, space charge distribution and TSDC currents in the insulation samples were analyzed to evaluate the inhibitory effect on space charge injection. When LSM content is 6 wt. %, the experimental results show that the PTC effect of the specimen and charge injection are both being suppressed significantly. The maximum resistivity of it is decreased by 53.3% and the insulation sample has the smallest charge amount, 1.85 × 10−7 C under 10 kV/mm—decreased by 40%, 3.6 × 10−7 C under 20 kV/mm—decreased by 45%, and 6.42 × 10−7 C under 30 kV/mm—decreased by 26%. When the LSM content reaches 10 wt. %, the suppression effect on the PTC effect and the charge injection are both weakened, owing to the agglomeration of the conductive particles inside the composites which leads to the interface electric field distortion and results in charge injection enhancement.

Highly thermally conductive UHMWPE/NG composites with the segregated structure and their application for heat spreader

2020 ◽  
pp. 089270572096564
Author(s):  
Xiao Wang ◽  
Hui Lu ◽  
Jun Chen
Keyword(s):  
Thermal Conductivity ◽  
Laser Flash ◽  
Heating Process ◽  
X Ray Diffraction ◽  
Heat Spreader ◽  
Conductive Composites ◽  
Compression Direction ◽  
Thermal Analyzer ◽  
Thermally Conductive ◽  
Plane Direction

In this work, ultra-high molecular weight polyethylene (UHMWPE)/natural flake graphite (NG) polymer composites with the extraordinary high thermal conductivity were prepared by a facile mixed-heating powder method. Morphology observation and X-ray diffraction (XRD) tests revealed that the NG flakes could be more tightly coated on the surface of UHMWPE granules by mixed-heating process and align horizontally (perpendicular to the hot compression direction of composites). Laser flash thermal analyzer (LFA) demonstrated that the thermal conductivity (TC) of composites with 21.6 vol% of NG reached 19.87 W/(m·K) and 10.67 W/(m·K) in the in-plane and through-plane direction, respectively. Application experiment further demonstrated that UHMWPE/NG composites had strong capability to dissipate the heat as heat spreader. The obtained results provided a valuable basis for fabricating high thermal conductive composites which can act as advanced thermal management materials.

scholarly journals Environmentally Friendly Route for Fabricating Conductive Agent for Lithium-Ion Batteries: Carbon Nanoparticles Derived from Polyethylene

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 424
Author(s):  
Jihye Mok ◽  
Dalsu Choi ◽  
Suk Ho Bhang
Keyword(s):  
Lithium Ion Batteries ◽  
Carbon Nanoparticles ◽  
Nanoparticle Synthesis ◽  
Lithium Ion ◽  
Environmentally Friendly ◽  
Carbon Nanoparticle ◽  
P Utilization ◽  
Stable Performance ◽  
Conductive Agent ◽  
Economical Advantage

Here, we introduce an environmentally friendly way of fabricating carbon nanoparticles which can be utilized as conductive agent for lithium-ion batteries (LIBs). Polyethylene (PE), which comprises the largest portion of plastic waste, was used as a source for carbon nanoparticle synthesis. Sulfonation allowed chemical structural transformation of innately non-carbonizable PE into a carbonizable conformation, and carbon nanoparticles could be successfully derived from sulfonated PE. Then, PE-derived carbon nanoparticles were used as conductive agents for LIBs, and assembled cells exhibited stable performance. Even though the performance is not as good as Super-P, utilization of PE as a source of conductive agent for LIBs might provide an economical advantage to upcycle PE.

High-performance bilayer solar evaporators constructed by candle-derived carbon nanoparticle/wood hybrid

2021 ◽  
pp. 102636
Author(s):  
Zhen Hu ◽  
Liang Hao ◽  
Ning Liu ◽  
Panpan He ◽  
Huiying Bai ◽  
...  
Keyword(s):  
High Performance ◽  
Carbon Nanoparticle

Conductive composites based on PDVF-C/sub 2/F/sub 3/H and substituted or pure poly(pyrroles)

1994 ◽  
Author(s):  
G. Boiteux ◽  
A. Ho-Hoang ◽  
F. Fache ◽  
M. Lemaire ◽  
J.K. Jeszka
Keyword(s):  
Conductive Composites ◽  
Pure Poly

scholarly journals Carbon Nanoparticle Exerts Positive Growth Effects with Increase in Productivity by Down-Regulating Phytochrome B and Enhancing Internal Temperature in Rice

Rice Science ◽  
2021 ◽  
Vol 28 (3) ◽  
pp. 289-300
Author(s):  
Madhusmita Panigrahy ◽  
Subhashree Das ◽  
Yugandhar Poli ◽  
Pratap Kumar Sahoo ◽  
Khushbu Kumari ◽  
...  
Keyword(s):  
Phytochrome B ◽  
Internal Temperature ◽  
Carbon Nanoparticle ◽  
Growth Effects ◽  
Positive Growth ◽  
Increase In Productivity
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