Interface design of graphene/copper composites by matrix alloying with titanium

Chu, Ke; Wang, Fan; Wang, Xiaohu; Li, Yubiao; Geng, Zhongrong; Huang, Dajian; Zhang, Hu

doi:10.1016/j.matdes.2018.02.038

Cited by 210 publications

(71 citation statements)

References 45 publications

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“…The use of other types of nanotubes and nanoplatelets in a polymer matrix composite has also been reported . Moreover, the thermal and structural properties may also be enhanced by introducing a reaction layer at the matrix/filler interface .…”

Section: Introductionmentioning

confidence: 99%

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

et al. 2018

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A percolating network of hybrid fillers can provide significant synergic enhancement of thermal conductivity in polymer matrix composites. Especially, when platelets and fibers of high aspect ratios are mixed to form a percolating network, the percolation thresholds are small. However, the optimum ratio of platelets to fibers must be acquired for the maximum synergic enhancement. In this work, polysulfone (PSU) matrix‐hybrid fillers composite is designed with high thermal conductivity using a computational model. The calibration of computational model with several experimentally measured thermal conductivities of polymer matrix‐hybrid nanocomposites leads to the composition where maximum synergic effect/maximum thermal conductivity is expected. For the specific PSU–Graphene nano‐platelets (GNPs)/Carbon nano‐tubes (CNTs) hybrid composites synthesized in this study, the composition with maximum thermal conductivity as designed by the model is PSU/8.4% GNPs/1.6% CNTs. The samples produced experimentally around this composition have shown close agreement with the predictions of the model. Sensitivity analyses and parametric studies conducted on the model highlight that the dimensional parameters and the interface resistance of the fillers are the most sensitive to enhance the effective thermal conductivity. POLYM. COMPOS., 40:1419–1432, 2019. © 2018 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

et al. 2018

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“…The C/O ratio of ZnO/RGO (9.3) was determined to be significantly higher than that of GO (2.7), and this proves that the most of the oxygen functional groups of GO were effectively removed during the MAS process . This can be further proved by the high‐resolution C 1s XPS spectra (Figure S1 in the Supporting Information), in which ZnO/RGO (Figure S1 a in the Supporting Information) shows a considerably reduced concentration of oxygen‐containing groups relative to the GO precursor (Figure S1 b in the Supporting Information) . Figure d shows the Zn 2p XPS spectrum of ZnO/RGO.…”

Section: Resultsmentioning

confidence: 67%

ZnO Quantum Dots Coupled with Graphene toward Electrocatalytic N₂ Reduction: Experimental and DFT Investigations

Liu

Huang

et al. 2019

Chemistry A European J

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Electrochemical reduction of N2 to NH3 is a promising method for artificial N2 fixation, but it requires efficient and robust electrocatalysts to boost the N2 reduction reaction (NRR). Herein, a combination of experimental measurements and theoretical calculations revealed that a hybrid material in which ZnO quantum dots (QDs) are supported on reduced graphene oxide (ZnO/RGO) is a highly active and stable catalyst for NRR under ambient conditions. Experimentally, ZnO/RGO was confirmed to favor N2 adsorption due to the largely exposed active sites of ultrafine ZnO QDs. DFT calculations disclosed that the electronic coupling of ZnO with RGO resulted in a considerably reduced activation‐energy barrier for stabilization of *N2H, which is the rate‐limiting step of the NRR. Consequently, ZnO/RGO delivered an NH3 yield of 17.7 μg h−1 mg−1 and a Faradaic efficiency of 6.4 % in 0.1 m Na2SO4 at −0.65 V (vs. RHE), which compare favorably to those of most of the reported NRR catalysts and thus demonstrate the feasibility of ZnO/RGO for electrocatalytic N2 fixation.

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“…The solid solubility of Ti in CuTi alloy is estimated to be below 0.01 at.% at room temperature based on the Cu‐Ti phase diagram . This implies the supersaturation state of Ti for the present CuTi powder, which is attained by the very high cooling speed of gas atomization process …”

Section: Resultsmentioning

confidence: 93%

“…The spherical CuTi powder was first modified to flaky powder by ball‐milling as previously reported . The GO was dissolved in 200 mL of 9:1 ethanol/water mixed solvent under sonication for 1 h to obtain a GO suspension (0.5 mg mL −1 ).…”

Section: Methodsmentioning

confidence: 99%

Enhanced Interfacial Bonding and Mechanical Properties of Graphene/Cu Composites: A Matrix-Alloying Method

Wang

Chu

et al. 2018

Phys. Status Solidi A

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Strong graphene‐metal interface is of significant importance for the enhanced mechanical properties of graphene/metal composites. However, the design of robust interface for the specific graphene/Cu composites remains challenging. Here, the authors present a matrix‐alloying method for the interface optimization of reduced graphene oxide (RGO)/CuTi composites in which the Cu matrix is alloyed with a trace of Ti (0.3 at.%). It is found that a 5–20 nm thick TiC layer is in situ formed at the interface of RGO/CuTi composites, which shows a specific orientation relationship with RGO: (200)TiC//(0002)RGO[01¯1]TiC//[1¯210]RGO. The generated TiC layer dramatically enhances the interfacial bonding of RGO/CuTi composite, leading to a yield strength of 242 MPa and a tensile strength of 307 MPa at 2 vol.% RGO loading, 24 and 16% higher than those of 2 vol.% RGO/Cu composite without alloying, respectively. Therefore, the matrix‐alloying is an effective approach for enhancing the interfacial bonding and mechanical properties of graphene/Cu composites.

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Interface design of graphene/copper composites by matrix alloying with titanium

Cited by 210 publications

References 45 publications

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

ZnO Quantum Dots Coupled with Graphene toward Electrocatalytic N₂ Reduction: Experimental and DFT Investigations

Enhanced Interfacial Bonding and Mechanical Properties of Graphene/Cu Composites: A Matrix-Alloying Method

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Interface design of graphene/copper composites by matrix alloying with titanium

Cited by 210 publications

References 45 publications

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

Design and development of thermally conductive hybrid nano‐composites in polysulfone matrix

ZnO Quantum Dots Coupled with Graphene toward Electrocatalytic N2 Reduction: Experimental and DFT Investigations

Enhanced Interfacial Bonding and Mechanical Properties of Graphene/Cu Composites: A Matrix-Alloying Method

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ZnO Quantum Dots Coupled with Graphene toward Electrocatalytic N₂ Reduction: Experimental and DFT Investigations