Enhanced in‐plane and through‐plane thermal conductivity and mechanical properties of polyamide 4.6 composites loaded with hybrid carbon fiber, synthetic graphite and graphene

2021 ◽  
Author(s):  
Yoldas Seki ◽  
Elif Kizilkan ◽  
Akın İşbilir ◽  
Mehmet Sarikanat ◽  
Lutfiye Altay
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Carbon Fiber ◽  
Synthetic Graphite ◽  
Hybrid Carbon

Ultrahigh Thermal Conductivity of Epoxy Composites with Hybrid Carbon Fiber and Graphene Filler

2021 ◽  
Author(s):  
Zulfiqar Ali ◽  
Xiangdong Kong ◽  
Maohua Li ◽  
Xiao Hou ◽  
Linhong Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Fiber ◽  
Epoxy Composites ◽  
Hybrid Carbon

A Study on Thermal and Electrical Conductivities of Ethylene-Butene Copolymer Composites with Carbon Fibers

2021 ◽  
Vol 36 (4) ◽  
pp. 417-422
Author(s):  
Y. Hamid ◽  
P. Svoboda
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Carbon Fiber ◽  
Electric Conductivity ◽  
Carbon Fibers ◽  
Mechanical Strain ◽  
Electric Resistance ◽  
Resistance Change ◽  
Electrical Conductivities ◽  
Fiber Sample

Abstract Ethylene-butene copolymer (EBC)/carbon-fiber (CF) composites can be utilized as an electromechanical material due to their ability to change electric resistance with mechanical strain. The electro-mechanical properties and thermal conductivity of ethylene butene copolymer (EBC) composites with carbon fibers were studied. Carbon fibers were introduced to EBC with various concentrations (5 to 25 wt%). The results showed that carbon fibers’ addition to EBC improves the electric conductivity up to 10 times. Increasing the load up to 2.9 MPa will raise the electric resistance change by 4 500% for a 25% fiber sample. It is also noted that the EBC/CF composites’ electric resistance underwent a dramatic increase in raising the strain. For example, the resistance change was around 13 times higher at 15% strain compared to 5% strain. The thermal conductivity tests showed that the addition of carbon fibers increases the thermal conductivity by 40%, from 0.19 to 0.27 Wm–1K–1.

scholarly journals Improving the Vertical Thermal Conductivity of Carbon Fiber-Reinforced Epoxy Composites by Forming Layer-by-Layer Contact of Inorganic Crystals

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3092 ◽  
Author(s):  
Eunbi Lee ◽  
Chi Hyeong Cho ◽  
Sae Hoon Hwang ◽  
Min-Geun Kim ◽  
Jeong Woo Han ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Carbon Fiber ◽  
Layer By Layer ◽  
Fiber Reinforced ◽  
Cfrp Composites ◽  
Inorganic Crystals ◽  
Layer Contact ◽  
Carbon Fiber Reinforced ◽  
Layer Coating

A carbon fiber-reinforced polymer (CFRP) is a light and rigid composite applicable in various fields, such as in aviation and automobile industry. However, due to its low thermal conductivity, it does not dissipate heat sufficiently and thus accumulates heat stress. Here, we reported a facile and effective strategy to improve the through-thickness thermal conductivity of CFRP composites by using a layer-by-layer coating of inorganic crystals. They could provide efficient heat transfer pathways through layer-by-layer contact within the resulting composite material. The high thermally conductive CFRP composites were prepared by employing three types of inorganic crystal fillers composed of aluminum, magnesium, and copper on prepreg through the layer-by-layer coating process. The vertical thermal conductivity of pure CFRP was increased by up to 87% on using magnesium filler at a very low content of 0.01 wt %. It was also confirmed that the higher the thermal conductivity enhancement was, the better were the mechanical properties. Thus, we could demonstrate that the layer-by-layer inclusion of inorganic crystals can lead to improved through-thickness thermal conductivity and mechanical properties of composites, which might find applications in varied industrial fields.

Investigation of thermal and mechanical properties of synthetic graphite and recycled carbon fiber filled polypropylene composites

2019 ◽  
Vol 6 (6) ◽  
pp. 065312 ◽  
Author(s):  
Metehan Atagur ◽  
Orhan Akyuz ◽  
Kutlay Sever ◽  
Yoldas Seki ◽  
Ozgur Seydibeyoglu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Thermal And Mechanical Properties ◽  
Polypropylene Composites ◽  
Synthetic Graphite

Application of Carbon Fiber-Based Composite for Electric Vehicle

2014 ◽  
Vol 896 ◽  
pp. 574-577 ◽  
Author(s):  
Miftahul Anwar ◽  
Indro Cahyono Sukmaji ◽  
Wisnu R. Wijang ◽  
Kuncoro Diharjo
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Glass Fiber ◽  
External Load ◽  
Volume Fraction ◽  
Fiber Composite ◽  
Impact Testing ◽  
Fiber Volume ◽  
Glass Fiber Composite ◽  
Hybrid Carbon

In the present work, we study how to improve mechanical properties of carbon fiber reinforced plastics (CFRP) in order to increase crashworthiness probability. Experimentally, hybrid carbon /glass fiber composite was made in order to get higher mechanical properties. As a results, with increasing carbon fiber volume fraction (% vol.), tensile strength and flexural strength of the composite are increased. Simulation of impact testing is also performed using data properties taken from the experiment with variation of impact forces on front bumper structure. By varying external load to the bumper, the result shows that higher thickness of hybrid carbon/glass fiber composite has always smaller stress values than thinner one. On the other hand, the displacement of hybrid carbon/glass car bumper increases linearly with increasing external load.

scholarly journals Mechanically Improved and Multifunctional CFRP Enabled by Resins with High Concentrations Epoxy-Functionalized Fluorographene Fillers

2021 ◽  
Author(s):  
Junhua Wei
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Elastic Modulus ◽  
Carbon Fiber ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Reinforcing Particles ◽  
Thermoset Resin ◽  
High Concentrations ◽  
Carbon Based

To meet the maximum potential of the mechanical properties of carbon fiber reinforced plastics (CFRP), stress transfer between the carbon fibers through the polymer matrix must be improved. A recent promising approach reportedly used reinforcing particles as fillers dispersed in the resin. Carbon based fillers are an excellent candidate for such reinforcing particles due to their intrinsically high mechanical properties, structure and chemical nature similar to carbon fiber and high aspect ratio. They have shown great potential in increasing the strength, elastic modulus and other mechanical properties of interest of CFRPs. However, a percolation threshold of ~1% of the carbon-based particle concentration in the base resin has generally been reported, beyond which the mechanical properties deteriorate due to particle agglomeration. As a result, the potential for further increase of the mechanical properties of CFRPs with carbon-based fillers is limited. We report a significant increase in the strength and elastic modulus of CFRPs, achieved with a novel reinforced thermoset resin that contains high loadings of epoxy-reacted fluorographene (ERFG) fillers. We found that the improvement in mechanical performance of CFRPs was correlated with increase in ERFG loading in the resin. Using a novel thermoset resin containing 10 wt% ERFG filler, CFRPs fabricated by wet layup technique with twill weaves showed a 19.6% and 17.7% increase in the elastic modulus and tensile strength respectively. In addition, because of graphene’s high thermal conductivity and high aspect ratio, the novel resin enhanced CFRPs possessed 59.3% higher through-plane thermal conductivity and an 81-fold reduction in the hydrogen permeability. The results of this study demonstrate that high loadings of functionalized particles dispersed in the resin is a viable path towards fabrication of improved, high-performance CFRP parts and systems.

scholarly journals Thermal conductivity and mechanical properties of synthetic graphite loaded polyphenylene sulfide composites

2020 ◽  
Author(s):  
Gozde Sevig Tantug ◽  
Yoldas Seki ◽  
Mehmet Sarikanat ◽  
Lutfiye Altay ◽  
Sena Gulen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Polyphenylene Sulfide ◽  
Synthetic Graphite

Improving thermal conductivity of polybutylene terephthalate composites with hybrid synthetic graphite and carbon fiber

2021 ◽  
pp. 089270572110184
Author(s):  
Zafer Yenier ◽  
Sibel Aker ◽  
Yoldas Seki ◽  
Lutfiye Altay ◽  
Ozgur Bigun ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Weight Fraction ◽  
High Heat ◽  
Morphological Properties ◽  
Polybutylene Terephthalate ◽  
Melt Mixing ◽  
Synthetic Graphite

Polybutylene terephthalate (PBT) is a semi-crystalline engineering thermoplastic polyester. PBT offers rapid molding cycles, high heat resistant, crystallinity, fatigue resistance, strength and rigidity, excellent electrical properties, creep resistance, reproducible mold shrinkage and chemical resistance. In this study, PBT was loaded with synthetic graphite and carbon fiber at different weight fractions (10–40 wt.%). PBT-based composites were fabricated by the melt mixing process by using a co-rotating twin screw extruder then thermal, mechanical and morphological properties of filled PBT composites was investigated. Weight fraction of carbon fiber (up to 30 wt.%) increases the tensile strength and flexural strength of PBT, but synthetic graphite loading decreases the tensile strength and flexural strength of PBT. The highest in-plane and through-plane thermal conductivity values were obtained as 9.24 for 40 wt.% synthetic graphite filled composite and 3.41 W/mK for 40 wt.% carbon fiber reinforced composite, respectively. Carbon fiber was found to be more effective in increasing the through-plane thermal conductivities than synthetic graphite.

Sign in / Sign up

Export Citation Format

Share Document