Effects of carbon fiber modification with multiwall CNT on the electrical conductivity and EMI shielding effectiveness of polycarbonate/carbon fiber/CNT composites

Jang, Myung Geun; Ryu, Seung Chan; Juhn, Kyu Jin; Kim, Sung Kyu; Kim, Woo Nyon

doi:10.1002/app.47302

Cited by 30 publications

(8 citation statements)

References 41 publications

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“…SCFs with diameter of 7 μm and length of 2-5 mm were supplied from ACP Composites, Livermore, CA, USA (Figure 1a,c). The surface hydroxyl treatment of carbon fibers was conducted with a concentrated nitric acid and concentrated sulfuric acid mixed solution (1:3 by mass) to enhance the interface bonding force between the matrix and fiber [34].…”

Section: Methodsmentioning

confidence: 99%

High-Temperature Tribological Behavior of HDPE Composites Reinforced by Short Carbon Fiber under Water-Lubricated Conditions

2022

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The polymer water-lubricated bearing is widely used in marine transmission systems, and the tribological properties can be improved by addition of inorganic nano-fillers. The aim of this study is to investigate the effect of SCFs and temperature on the water-lubricating properties of high-density polyethylene (HDPE) composites. HDPE composites reinforced by varying content of short carbon fibers (SCFs) were fabricated via twin-screw extrusion and injection molding techniques to study the hardness and surface wettability of those composites. The tribological properties under water-lubricated conditions were investigated through a pin-on-disk reciprocating tribometer under different temperatures. The results showed that the increase in hardness of HDPE composites reached maximum to 42.9% after adding 25 wt % SCFs. The contact angle also increased with the increase in SCFs content and reached a maximum of 95.2° as the amount of SCFs increased to 20 wt %. The incorporation of SCFs increased the wear resistance and lubricating property of HDPE composites at different temperatures. The HDPE composite containing 20 wt % SCFs showed the lowest friction coefficient of 0.076 at 40 °C, and the wear track depth reached a maximum of 36.3 mm at 60 °C. Based on the surface wetting property and wear analysis, potential effect mechanisms of fillers and temperature were discussed. The knowledge from this study is useful for designing the anti-wear water-lubricated polymer bearing.

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Section: Methodsmentioning

confidence: 99%

High-Temperature Tribological Behavior of HDPE Composites Reinforced by Short Carbon Fiber under Water-Lubricated Conditions

2022

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“…Carbon-based fillers are widely employed for enhancing EMI shielding performance because of their good electrical conductivity and dielectric constant. [3][4][5][6] Graphite sheet, carbon nanofiber, graphene, and carbon aerogels are all promising. [7][8][9] The introduction of carbon-based fillers is an efficient way to enhance EMI shielding and mechanical performance simultaneously.…”

Section: Introductionmentioning

confidence: 99%

“…The introduction of conductive fillers is an effective way to endow polymers with functional properties. Carbon‐based fillers are widely employed for enhancing EMI shielding performance because of their good electrical conductivity and dielectric constant 3–6 . Graphite sheet, carbon nanofiber, graphene, and carbon aerogels are all promising 7–9 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced impact resistance and electromagnetic interference shielding of carbon nanotubes films composites

Mei

Lü

Zhou

et al. 2020

J of Applied Polymer Sci

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High reliability and high-performance electromagnetic interference (EMI) shielding polymeric composite was fabricated by introducing carbon nanotube films (CNT f) into an epoxy (EP) matrix as mechanical and EMI shielding reinforcement simultaneously. According to the computed tomography (CT) detection recorded by a high-speed camera, CNT f exhibited excellent mechanical behavior and good energy absorption. While being introduced into laminated EP composite, the CNT f enhanced both the mechanical performance and EMI shielding performance. The damage mechanism of CNT f /EP was studied by CT detection of the impact process, indicating that the CNT f absorbed the impact energy by improving the delamination resistance. Additionally, the multilayered CNT f can trap and attenuate the entered electromagnetic microwaves by repeated adsorption, reflection, and scattering in the composite, resulting in excellent EMI shielding performance. Consequently, the energy absorption and the total shielding effectiveness of the CNT f /EP reached to 4.58 × 10 −3 J and 52.31 dB, respectively. Therefore, we demonstrated that the CNT f was an ideal functional reinforcement for mechanically strong and high-performance EMI shielding polymeric composites and the CNT f reinforced EP composite is promising in practical EMI-shielding applications.

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“…In another study, the polycarbonate/carbonized fiber/MWCNT composites developed by Jang et al . were reported to have an EMI SE of 26 dB . The addition of CNT material can not only improve the bonding strength by the chelating of metal catalysts, but also be used as a conductive material.…”

Section: Introductionmentioning

confidence: 99%

High‐electromagnetic‐shielding cotton fabric prepared using multiwall carbon nanotubes/nickel–phosphorus electroless plating

Wang

Ding

et al. 2020

Applied Organom Chemis

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High‐electromagnetic‐shielding cotton fabric (CF) was prepared using carboxyl‐functionalized multiwall carbon nanotubes (MWCNTs‐COOH)/nickel–phosphorus (Ni‐P) electroless plating. Firstly, MWCNTs‐COOH was loaded on CF used to chelate the metal catalyst followed by electroless plating to impart outstanding electrical conductivity and electromagnetic shielding properties. The intermediate MWCNTs‐COOH layer not only improves the bonding strength via the chelating effect, but also can be used as a conductive material. This synergistic action of MWCNTs‐COOH and Ni‐P layer can work together to improve the electromagnetic interference shielding performance. The features of Ni‐P/MWCNTs‐COOH/CF were characterized using scanning electron microscopy, energy‐dispersive spectroscopy, X‐ray photoelectron spectroscopy and X‐ray diffraction. The resulting Ni‐P/MWCNTs‐COOH/CF fabrics show high surface resistance of 1.66 Ω sq−1 and robust electromagnetic shielding effectiveness of 40.2 dB. Furthermore, benefiting from the strong interface interaction, the as‐prepared composite fabrics retain stable performances after undergoing a series of physical and chemical tests, confirming promising practical applications even under harsh conditions.

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Effects of carbon fiber modification with multiwall CNT on the electrical conductivity and EMI shielding effectiveness of polycarbonate/carbon fiber/CNT composites

Cited by 30 publications

References 41 publications

High-Temperature Tribological Behavior of HDPE Composites Reinforced by Short Carbon Fiber under Water-Lubricated Conditions

High-Temperature Tribological Behavior of HDPE Composites Reinforced by Short Carbon Fiber under Water-Lubricated Conditions

Enhanced impact resistance and electromagnetic interference shielding of carbon nanotubes films composites

High‐electromagnetic‐shielding cotton fabric prepared using multiwall carbon nanotubes/nickel–phosphorus electroless plating

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