Epoxy-carbon black composite foams with tunable electrical conductivity and mechanical properties: Foaming improves the conductivity

2017 ◽  
Vol 134 (33) ◽  
pp. 45071 ◽  
Author(s):  
Jia Yue ◽  
Yu Xu ◽  
Jianjun Bao
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Carbon Black ◽  
Composite Foams

scholarly journals Development of Coffee Biochar Filler for the Production of Electrical Conductive Reinforced Plastic

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1916 ◽  
Author(s):  
Mauro Giorcelli ◽  
Mattia Bartoli
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Electrical Properties ◽  
Carbon Black ◽  
Epoxy Resin ◽  
Resin Composites ◽  
Powder Form ◽  
Coffee Waste ◽  
Reinforced Plastic ◽  
Epoxy Resin Composites

In this work we focused our attention on an innovative use of food residual biomasses. In particular, we produced biochar from coffee waste and used it as filler in epoxy resin composites with the aim to increase their electrical properties. Electrical conductivity was studied for the biochar and biochar-based composite in function of pressure applied. The results obtained were compared with carbon black and carbon black composites. We demonstrated that, even if the coffee biochar had less conductivity compared with carbon black in powder form, it created composites with better conductivity in comparison with carbon black composites. In addition, composite mechanical properties were tested and they generally improved with respect to neat epoxy resin.

Electrical conductivity and mechanical properties of carbon black modified polyolefinic blends influenced by phase inversion

2017 ◽  
Vol 134 (46) ◽  
pp. 45512 ◽  
Author(s):  
Olga Mysiukiewicz ◽  
Tomasz Sterzyński ◽  
Paweł Ławniczak ◽  
Maria Rogodzińska
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Carbon Black ◽  
Phase Inversion

Physico-mechanical properties and electrical conductivity of compositions polypropylene – carbon black

2019 ◽  
Author(s):  
O. A. Knyazheva ◽  
O. N. Baklanova ◽  
K. S. Zhansakova ◽  
S. S. Puchkov ◽  
A. V. Lavrenov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Carbon Black

Optimization of the Electrical Conductivity of ABS Nanocomposites filled with Carbon Black and Carbon Nanotubes

2006 ◽  
Vol 977 ◽  
Author(s):  
Shantanu Talapatra ◽  
Rosario A. Gerhardt
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Carbon Black ◽  
Processing Parameters ◽  
Electrical Performance ◽  
Single Wall Carbon Nanotubes ◽  
Structural Applications ◽  
Filler Fraction ◽  
Using Data

AbstractPoly(acrylonitrile-co-butadiene-co-styrene) (ABS) is a thermoplastic polymer that is used in numerous structural applications as a result of its excellent mechanical properties. For those applications where good electrical conductivity is also desired, carbon black is often used as the filler of choice. Most reports in the literature indicate that at least 8 wt% carbon black filler is needed in order to achieve percolation. Our group recently reported that by manual mixing of ABS pellets and carbon black to create a segregated microstructure, percolation was achieved at an unprecedented low filler fraction of less than 0.01 wt% carbon black, a value which is comparable to or even better than that obtained using single wall carbon nanotubes as the filler. While the ABS/CB composites had excellent electrical performance, with a conductivity as high as 10-1 S/m, their mechanical strength was compromised.In this paper we report on new experiments designed to maintain high electrical conductivity while improving on the mechanical behavior of percolating ABS/CB nanocomposites. The experiments were aimed at controlling the processing parameters such as temperature, pressure and time during hot pressing of the mechanically mixed precursor materials. Using data obtained at the various temperature-pressure combinations used, it will be shown that similar volume percentages of carbon black and carbon nanotubes can be used to obtain equivalent conductivities, suitable for EMI shielding, while still maintaining good mechanical properties.

Structure and Electrical Conductivity of Polystyrene/Carbon Black Composites Prepared by Microlayer Coextrusion

2016 ◽  
Vol 717 ◽  
pp. 38-46 ◽  
Author(s):  
Chang Jin Li ◽  
Liang Zhao Xiong ◽  
Cong Ji Yuan ◽  
Zhi Wei Jiao ◽  
Wei Min Yang
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Electrical Resistivity ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Layered Structure ◽  
Electrically Conducting ◽  
Percolation Effect ◽  
Multilayered Composites ◽  
Double Percolation

Electrically conducting composites with a structure of alternating (A-B-A)n layers were prepared by a novel microlayer coextrusion, which were consisted of alternating layers of polystyrene (PS) and layers of carbon black (CB)-filled polystyrene (PSCB). The co-continuous structure with selective location of CB in PSCB layers was controllable by changing the number of multiplying elements, and decreased the percolation threshold and electrical resistivity of multilayered composites because of the double percolation effect. In addition, the multilayered composites exhibited better mechanical properties than that of the conventional blends, which were related to the layered structure and small size of CB aggregates.

Polylactide composite foams containing carbon nanotubes and carbon black: Synergistic effect of filler on electrical conductivity

Carbon ◽  
2015 ◽  
Vol 95 ◽  
pp. 380-387 ◽  
Author(s):  
Defeng Wu ◽  
Qiaolian Lv ◽  
Saihua Feng ◽  
Jianxiang Chen ◽  
Yang Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Carbon Black ◽  
Synergistic Effect ◽  
Composite Foams

scholarly journals Selective Localization of Carbon Black in Bio-Based Poly (Lactic Acid)/Recycled High-Density Polyethylene Co-Continuous Blends to Design Electrical Conductive Composites with a Low Percolation Threshold

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1583 ◽  
Author(s):  
Xiang Lu ◽  
Benhao Kang ◽  
Shengyu Shi
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Electrical Conductivity ◽  
Lactic Acid ◽  
Carbon Black ◽  
Percolation Threshold ◽  
High Density Polyethylene ◽  
Poly Lactic Acid ◽  
Electrically Conductive ◽  
Selective Localization

The electrically conductive poly (lactic acid) (PLA)/recycled high-density polyethylene (HDPE)/carbon black (CB) composites with a fine co-continuous micro structure and selective localization of CB in the HDPE component were fabricated by one-step melt processing via a twin-screw extruder. Micromorphology analysis, electrical conductivity, thermal properties, thermal stability, and mechanical properties were investigated. Scanning electron microscope (SEM) images indicate that a co-continuous morphology is formed, and CB is selectively distributed in the HDPE component. With the introduction of CB, the phase size of the PLA component and the HDPE component in PLA/HDPE blends is reduced. In addition, differential scanning calorimetry (DSC) and thermos gravimetric analysis (TGA) results show that the introduction of CB promotes the crystallization behavior of the PLA and HDPE components, respectively, and improves the thermal stability of PLA70/30HDPE/CB composites. The electrically conductive percolation threshold of the PLA70/30HDPE/CB composites is around 5.0 wt %, and the electrical conductivity of PLA70/30HDPE/CB composites reaches 1.0 s/cm and 15 s/cm just at the 10 wt % and 15 wt % CB loading, respectively. Further, the tensile and impact tests show that the PLA70/30HDPE/CB composites have good mechanical properties. The excellent electrical conductivity and good mechanical properties offer the potential to broaden the application of PLA/HDPE/CB composites.

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