Electrically conductive composites based on epoxy resin containing polyaniline-DBSA- and polyaniline-DBSA-coated glass fibers

2003 ◽  
Vol 91 (2) ◽  
pp. 1329-1334 ◽  
Author(s):  
W. Jia ◽  
R. Tchoudakov ◽  
E. Segal ◽  
M. Narkis ◽  
A. Siegmann
Keyword(s):  
Epoxy Resin ◽  
Glass Fibers ◽  
Electrically Conductive ◽  
Coated Glass ◽  
Conductive Composites

Preparation and Electromagnetic Shielding Effectiveness of a New Kind of Electromagnetic Shielding Composite Coatings

2013 ◽  
Vol 395-396 ◽  
pp. 37-40 ◽  
Author(s):  
Deng Gao Guan ◽  
Yao Sun ◽  
Guan Li Xu ◽  
Chuan Min Sun ◽  
Hua Wei Li ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Composite Coatings ◽  
Glass Fibers ◽  
Electromagnetic Shielding ◽  
Added Value ◽  
Shielding Effectiveness ◽  
Coated Glass ◽  
Nickel Powders ◽  
Study Results ◽  
Electromagnetic Shielding Effectiveness

A new kind of the electromagnetic shielding composite coatings with high performance was prepared using the Ni-Cu-coated glass fibers and nickel powders as fillers and using epoxy resin as binder. The effects of the fibers on the conductivity and electromagnetic shielding effectiveness of the coatings were studied. The study results show as follows: 1) when the optimum ratio of the fillers to epoxy resin is 4:1, the coatings containing 6 wt% the Ni-Cu-coated glass fibers has best conductivity and electromagnetic shielding effectiveness; when the coating layer thickness is 300 μm, the shielding effectiveness of the coatings is up to 43.71-52.31 dB and increased an average of 13.94 dB compared with the nickel powders/ epoxy resin electromagnetic shielding coatings in the frequency range of 0.3-1000 MHz. This offers a new idea to enhance the added value of the glass fibers and the prevention of electromagnetic environmental pollution.

Preparation of the polypropylene/nickel coated glass fibers conductive composites with a low percolation threshold

2015 ◽  
Vol 143 ◽  
pp. 124-127 ◽  
Author(s):  
Chao Guo ◽  
Hongji Duan ◽  
Chunyu Dong ◽  
Guizhe Zhao ◽  
Yaqing Liu ◽  
...  
Keyword(s):  
Percolation Threshold ◽  
Glass Fibers ◽  
Coated Glass ◽  
Conductive Composites

scholarly journals Electrically conductive composites based on epoxy resin modified with graphene

2020 ◽  
pp. 19-25
Author(s):  
A. V. Gerasimova ◽  
◽  
N. R. Memetov ◽  
A. G. Tkachev ◽  
V. S. Yagubov ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Electrically Conductive ◽  
Conductive Composites

Electrically conductive composites based on epoxy resin with polyaniline-DBSA fillers

2003 ◽  
Vol 132 (3) ◽  
pp. 269-278 ◽  
Author(s):  
W. Jia ◽  
R. Tchoudakov ◽  
E. Segal ◽  
R. Joseph ◽  
M. Narkis ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Electrically Conductive ◽  
Conductive Composites

Experimental Research on Mechanical Behavior of GFRP Bars under High Temperature

2011 ◽  
Vol 71-78 ◽  
pp. 3591-3594 ◽  
Author(s):  
Xiao Lu Wang ◽  
Xiao Xiong Zha
Keyword(s):  
Glass Transition ◽  
High Temperature ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Epoxy Resin ◽  
High Temperatures ◽  
Glass Fibers ◽  
Ultimate Tensile Stress ◽  
Gfrp Bars ◽  
Tensile Test Result

Experimental results on tensile mechanics properties of GFRP bars at high temperatures are present in this paper. Thirty commercially produced GFRP tensile specimens of 8mm diameter were tested at high temperature ranging from 10°Cup to 500°C. Tensile test result indicates that, the ultimate tensile stress has significant reduction at two temperature zones, one is glass transition temperature of epoxy resin (80-120°C), with strength degradation 22%, the second is the soften temperature of glass fibers(about 400°C), the strength decrease drastically with almost linear rate and remained 33% residual strength at 500°C. The elastic modulus remained unchanged until glass transition temperature of epoxy resin, and the modulus declined linearly with the temperature elevating. Stress-strain relationships of GFRP bars exhibit liner performance even at high temperatures.

Possibilities of Utilization of Waste Materials in Production of Electrically Conductive Composites on Silicate Basis

2021 ◽  
Vol 321 ◽  
pp. 171-176
Author(s):  
Jana Majerová ◽  
Rostislav Drochytka
Keyword(s):  
Nickel Powder ◽  
Cement Composite ◽  
Wire Drawing ◽  
Waste Materials ◽  
Electrically Conductive ◽  
Conductive Composites ◽  
Steel Wires ◽  
The Subject ◽  
Conductive Properties ◽  
Functional Fillers

The electrical conductivity of concrete can be achieved by adding steel wires or functional fillers. Commonly used fillers are nanotubes, carbon black, nickel powder and so on. These fillers are expensive, but there is a possibility to use waste materials. This is the subject of this experiment. The conductive properties of conductive sand, sludge from the wire drawing process, iron grinding dust waste and waste carbon were verified. From these fillers, waste carbon showed the best electrical properties (impedance). The impedance of the waste carbon was 0.31 Ω and the impedance of the cement composite containing 70% of the weight of waste carbon was less than 670 Ω.

EFFECTS OF NUMBER OF PLIES ON LIGHTNING STRIKE PROTECTION OF ELECTRICALLY CONDUCTIVE LAYER-WISE HYBRID LAMINATES

2021 ◽  
Author(s):  
SIWAT MANOMAISANTIPHAP ◽  
TOMOHIRO YOKOZEK YOKOZEKI
Keyword(s):  
Epoxy Resin ◽  
Composite Laminates ◽  
Bending Strength ◽  
Fuel Efficiency ◽  
Lightning Strike ◽  
Conductive Layer ◽  
Electrically Conductive ◽  
Hybrid Laminates ◽  
Conductive Polyaniline ◽  
Pani Layer

With the development of composite technologies, aircraft become lighter and more fuel efficiency. The composite aircraft, however, become susceptible to lightning strike. Developing lightning strike protection (LSP) system need to couple with composite technologies. The authors present a concept of LSP using layer-wise hybrid laminates (CF/Hybrid) in this study. The aim of the study is to validate the effectiveness of layer-wise hybrid laminates structure for lightning strike application by using conventional epoxy-resin CFRP for main structure and electrically conductive layer as a cover layer. The composite laminates include two different types of resin in each layer: conductive polyaniline-based matrix (CF/PANI) and conventional epoxy resin (CF/epoxy). CF/PANI layers varied from 1, 2, and 4 layers with corresponding 7, 6, and 4 layers of CF/epoxy to find out the least effective number of CF/PANI that can prevent lightning strike damage. The specimens were characterized for their mechanical properties and underwent simulated lightning strike test to realize their effectiveness. The result of simulated lightning strike has shown that a layer of conductive CF/PANI can help to avoid catastrophic damage on CF/epoxy. With a greater number of CF/PANI, the less detectable damage in CF/PANI layer became. In the case of CF/Hybrid with 4 layers of CF/PANI shows 70% residual bending strength after the lightning strike. With the aid of nondestructive inspection tools, i.e., thermography and ultrasonic test, the mechanism of damage on the composite panels were observed and analyzed. From this study, CF/Hybrid with 4 layers shows the optimal properties for lightning strike protection.

scholarly journals Fractal dendrite-based electrically conductive composites for laser-scribed flexible circuits

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Cheng Yang ◽  
Xiaoya Cui ◽  
Zhexu Zhang ◽  
Sum Wai Chiang ◽  
Wei Lin ◽  
...  
Keyword(s):  
Electrically Conductive ◽  
Conductive Composites
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