Improving the thermal conductivity and mechanical property of epoxy composites by introducing polyhedral oligomeric silsesquioxane‐grafted graphene oxide

Zhang, Chengxiang; Li, Tingxi; Song, Hui; Han, Yongqin; Dong, Yaoyao; Wang, Yanmin; Wang, Qing

doi:10.1002/pc.24868

Cited by 22 publications

(9 citation statements)

References 33 publications

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“…The mechanical properties of the rGO-based nanocomposites were assessed by tensile testing and compared to the neat EBA matrix (Figure 4). Young’s modulus was found to increase by 70%, 91%, and 102% for the 2%, 3%, and 4% nanocomposites by the mere addition of neat rGO to the matrix [16,17,18,19,20,21]. At the same time, the nanocomposites showed a significant decrease in tensile strain, from approximately 1400% to 400%, as a consequence of failure points related to the addition of 3-4% nanofiller and the appearance of nanofiller-clusters or even percolated networks.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Reduced and Surface-Modified Graphene Oxide in Poly(Ethylene-co-Butyl Acrylate) Composites for Electrical Applications

et al. 2019

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Promising electrical field grading materials (FGMs) for high-voltage direct-current (HVDC) applications have been designed by dispersing reduced graphene oxide (rGO) grafted with relatively short chains of poly (n-butyl methacrylate) (PBMA) in a poly(ethylene-co-butyl acrylate) (EBA) matrix. All rGO-PBMA composites with a filler fraction above 3 vol.% exhibited a distinct non-linear resistivity with increasing electric field; and it was confirmed that the resistivity could be tailored by changing the PBMA graft length or the rGO filler fraction. A combined image analysis- and Monte-Carlo simulation strategy revealed that the addition of PBMA grafts improved the enthalpic solubility of rGO in EBA; resulting in improved particle dispersion and more controlled flake-to-flake distances. The addition of rGO and rGO-PBMAs increased the modulus of the materials up to 200% and the strain did not vary significantly as compared to that of the reference matrix for the rGO-PBMA-2 vol.% composites; indicating that the interphase between the rGO and EBA was subsequently improved. The new composites have comparable electrical properties as today’s commercial FGMs; but are lighter and less brittle due to a lower filler fraction of semi-conductive particles (3 vol.% instead of 30–40 vol.%).

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Section: Resultsmentioning

confidence: 99%

Characterization of Reduced and Surface-Modified Graphene Oxide in Poly(Ethylene-co-Butyl Acrylate) Composites for Electrical Applications

et al. 2019

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“…In this case, the temperature decrease showed in Figure 12 may be explained by the enhancement of the GFRPs thermal conductivity. Other researches have shown the capacity of graphene to improve thermal conductivity of polymers [21,23]. Because the workpiece is more conductive, the tool accumulates less heat and remains cooler.…”

Section: Cutting Temperaturesmentioning

confidence: 99%

“…One of the most promising applications is its use as filler into polymers. Graphene based nanocomposites have shown significant improvement on electrical and thermal conductivity as well as mechanical properties [21][22][23]. In recent years, thermal behavior of FRP machining has retained the attention of researchers.…”

Section: Introductionmentioning

confidence: 99%

Effect of Graphene on Machinability of Glass Fiber Reinforced Polymer (GFRP)

El-Ghaoui

Châtelain

Ouellet-Plamondon

2019

JMMP

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Glass fiber reinforced polymers (GFRPs) are used extensively in many industries because of their low cost and high mechanical properties. Even if composite manufacturing processes are well controlled and allow to fabricate near net shapes, machining operations are still necessary to complete the manufacturing. As a composite material, GFRP machining remains difficult because of its heterogeneous and anisotropic character. This work intends to investigate the effect of graphene addition to the epoxy matrix of GFRP on its machinability. The epoxy was filled with 1 wt% graphene by mixing, sonicating, and then being used to produce unidirectional GFRP laminate by hand layup methods. Thermocouples were bonded on a chemical vapor deposition (CVD) diamond coated tool in order to record cutting temperatures during the trimming process. The cutting forces were recorded and the resulting surface roughness after trimming was measured to qualify properly the machinability of the modified GFRP. Compared to the reference material (GFRP without graphene), the additive improved the machining process by decreasing the cutting temperature and forces as well as the surface roughness without deteriorating the inter-laminar shear strength.

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“…The thermal conductivity values reported in the present work are analogous with the reported values for the GO-epoxy nanocomposites and comparison is given in Table 6. Zhang et al 54 prepared polyhedral oligomeric silsesquioxane graphene oxide (POSS-GO) and incorporated it in epoxy. They observed 63% enhancement in thermal conductivity with 1phr POSS-GO in epoxy.…”

Section: Thermal Analysismentioning

confidence: 99%

High performance epoxy nanocomposites with enhanced thermal and mechanical properties by incorporating amine-terminated oligoimide-grafted graphene oxide

Khan

Siddiqi

Park

et al. 2019

High Performance Polymers

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In this work, thermal conductivity and mechanical strength of a commercial epoxy resin were improved by incorporating an amine-terminated oligoimide modified graphene oxide (ATO-GO). For this purpose, the surface of GO was modified with flexible/stable imide backbone and amine terminals. The ATO-GO was incorporated in epoxy proportion to prepare series of nanocomposites. The terminal amino group of ATO-GO also acted as curing moiety for epoxy resin leading to good interfacial compatibility and dispersion in the epoxy matrix resulting in improved properties. The epoxy resin was cured with hardener Aradur-22962 and ATO-GO separately and the results of curing behavior were compared with each other, which clearly showed the curing action of ATO-GO. In the prepared ATO-GO-epoxy nanocomposites, the filler enhanced the thermal conductivity, hardness and elastic modulus without decrease in thermal stability even at higher filler loading. In previous studies, it is reported that at higher GO, filler-loading properties like elastic modulus, hardness values, and glass transition temperature ( T g) were decreased. An enhancement of 59.5% in thermal conductivity was achieved for 5 wt% loading of ATO-GO filler as compared to neat epoxy. Along with this, thermal analysis revealed that the nanocomposites with 5 wt% filler loading have high T g and thermal strength. Nanoindentation results revealed that elastic modulus and hardness values enhanced by 104% and 147%, respectively, for the same nanocomposites. The enhanced thermal conductivity and good elastic behavior of the ATO-GO-epoxy nanocomposites demonstrated that these can be used as high-performance materials in electronic packing and electronic devices.

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Improving the thermal conductivity and mechanical property of epoxy composites by introducing polyhedral oligomeric silsesquioxane‐grafted graphene oxide

Cited by 22 publications

References 33 publications

Characterization of Reduced and Surface-Modified Graphene Oxide in Poly(Ethylene-co-Butyl Acrylate) Composites for Electrical Applications

Characterization of Reduced and Surface-Modified Graphene Oxide in Poly(Ethylene-co-Butyl Acrylate) Composites for Electrical Applications

Effect of Graphene on Machinability of Glass Fiber Reinforced Polymer (GFRP)

High performance epoxy nanocomposites with enhanced thermal and mechanical properties by incorporating amine-terminated oligoimide-grafted graphene oxide

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