Interlayer polymerization in amine-terminated macromolecular chain-grafted expanded graphite for fabricating highly thermal conductive and physically strong thermoset composites for thermal management applications

Zhang, Yinhang; Choi, Jang Rak; Park, Soo‐Jin

doi:10.1016/j.compositesa.2018.04.001

Cited by 116 publications

(37 citation statements)

References 28 publications

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“…As shown in Fig. 4(a), pure PTFE exhibits a sharp diffraction peak at 2 θ = 18.1° as well as two weak characteristic peaks at 2 θ = 31.4° and 36.8° 35 . In contrast with those of pure PTFE, the intensity of the characteristic diffraction peaks for pristine PES can be almost ignored, and only wide diffraction peaks in the range 17.5°–20° are visible (Fig.…”

Section: Resultsmentioning

confidence: 93%

Retracted: Influence of organic montmorillonite nanoparticles on the microstructures and thermal and tribological properties of polyethersulfone and polytetrafluoroethylene composites

Yan

Xue

Wang³

et al. 2020

Polymer International

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Because of high wear rate and low thermal deformation temperature, the generalization and application of polytetrafluoroethylene (PTFE) in the field of tribology is restrained to a certain extent. In order to improve the wear resistance and thermal stability of this self‐lubricating polymer, organic montmorillonite (OMMT) nanoparticle reinforced polyethersulfone (PES) and PTFE ternary composites were prepared by the cold molding and vacuum sintering technology. The effects of sodium montmorillonite (Na‐MMT) and OMMT on the microstructures, thermal stabilities and tribological properties of PTFE composites were comparatively studied. The results show that the thermal stability of the PES/PTFE composites is clearly improved by the incorporation of OMMT nanoparticles. Not only the friction coefficients but also the wear rates of OMMT/PES/PTFE composites are less than those of Na‐MMT/PES/PTFE composites under identical tribological tests. Of all these PTFE composites, the PES/PTFE composite containing 10.0 wt% OMMT nanoparticles exhibits the best friction and wear properties (μ = 0.14, k = 5.78 × 10−15 m3 N–1 m−1). This can be attributed to the existence of a polymer multicomponent layer consisting of PTFE, PES and OMMT on the composite surface as well as the formation of uniform PTFE transfer film on the worn surfaces of metal counterparts.

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Section: Resultsmentioning

confidence: 93%

Retracted: Influence of organic montmorillonite nanoparticles on the microstructures and thermal and tribological properties of polyethersulfone and polytetrafluoroethylene composites

Yan

Xue

Wang³

et al. 2020

Polymer International

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“…Two crucial challenges of synthesis are to achieve: (1) chemical compatibility between the polymer matrix and the nanofiller at the nanoscale; and (2) homogeneous dispersion of the nanofiller within the polymer matrix. The interfacial interaction between nanoclay fillers and polymer matrix, as well as the quality of nanoclay dispersion, has a significant influence on the performance of polymer/nanoclay composites [27]. These intercorrelated features determine the polymer/nanoclay composites' morphology and, thus, their final bulk properties such as strength, elastic modulus, thermal stability, heat distortion temperature, self-healing, shape memory abilities and gas barrier [28,29].…”

Section: Introductionmentioning

confidence: 99%

A Review of the Synthesis and Applications of Polymer–Nanoclay Composites

et al. 2018

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Recent advancements in material technologies have promoted the development of various preparation strategies and applications of novel polymer–nanoclay composites. Innovative synthesis pathways have resulted in novel polymer–nanoclay composites with improved properties, which have been successfully incorporated in diverse fields such as aerospace, automobile, construction, petroleum, biomedical and wastewater treatment. These composites are recognized as promising advanced materials due to their superior properties, such as enhanced density, strength, relatively large surface areas, high elastic modulus, flame retardancy, and thermomechanical/optoelectronic/magnetic properties. The primary focus of this review is to deliver an up-to-date overview of polymer–nanoclay composites along with their synthesis routes and applications. The discussion highlights potential future directions for this emerging field of research.

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“…On one hand, the solid solution deriving from inter-diffusion between the TiC coating and Cu matrix can trigger a growth of phonon scattering thus deteriorates the heat transfer ability [17,18]. On the other hand, the formation of amorphous layer between the GF and TiC interfacial layer not only can induce the phonon scattering but also possess extremely low TC, resulting in a reduction in the interfacial thermal conductance [34,35]. Although the introduction of TiC coating reduces the TC, whereas the TiC-coated graphite flake/Cu composites still exhibit a very high value.…”

Section: Bending Strengthmentioning

confidence: 99%

“…The highest TC of TiC coated graphite flake/Cu composites reaches 571 W m −1 K −1 , which is acquired at the volume fraction of 60%. TC, resulting in a reduction in the interfacial thermal conductance [34,35]. Although the introduction of TiC coating reduces the TC, whereas the TiC-coated graphite flake/Cu composites still exhibit a very high value.…”

Section: Bending Strengthmentioning

confidence: 99%

Improvement in Mechanical and Thermal Properties of Graphite Flake/Cu Composites by Introducing TiC Coating on Graphite Flake Surface

Zhang

Liu

et al. 2019

Metals

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In this work, TiC coating was successfully deposited on a graphite flake surface via molten salt technique, for the purpose of promoting the interfacial connection between Cu and graphite flake. Vacuum hot pressing was then employed to prepare TiC-coated graphite flake/Cu composite. The results indicate that introducing TiC coating on graphite flake surface can evidently reduce the pores and gaps at the interface, resulting in a significant improvement on the bending strength. When the TiC-coated graphite flake content is 60 vol%, the bending strength is increased by 58% compared with the uncoated one. The coefficient of thermal expansion dropped from 6.0 ppm·K−1 to 4.4 ppm·K−1, with the corresponding thermal conductivity as high as 571 W·m−1·K−1. The outstanding thermal conductivity, apposite coefficient of thermal expansion, as well as superior processability, make TiC-coated graphite flake/Cu composite a satisfactory electronic packaging material with vast prospect utilized in microelectronic industry.

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Interlayer polymerization in amine-terminated macromolecular chain-grafted expanded graphite for fabricating highly thermal conductive and physically strong thermoset composites for thermal management applications

Cited by 116 publications

References 28 publications

Retracted: Influence of organic montmorillonite nanoparticles on the microstructures and thermal and tribological properties of polyethersulfone and polytetrafluoroethylene composites

Retracted: Influence of organic montmorillonite nanoparticles on the microstructures and thermal and tribological properties of polyethersulfone and polytetrafluoroethylene composites

A Review of the Synthesis and Applications of Polymer–Nanoclay Composites

Improvement in Mechanical and Thermal Properties of Graphite Flake/Cu Composites by Introducing TiC Coating on Graphite Flake Surface

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