Electrical and mechanical properties of poly(dopamine)-modified copper/reduced graphene oxide composites

Jia, Zhengfeng; Li, Haoqi; Zhao, Yao; Frazer, Laszlo; Qian, Bosen; Borguet, Eric; Ren, Fei; Dikin, Dmitriy A.

doi:10.1007/s10853-017-1307-z

Cited by 48 publications

(16 citation statements)

References 23 publications

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“…They discovered that all these conductive additives improved the conductivity and tribological performances of conductive greases. Jia et al [25,26] discovered that graphene can significantly enhance the tribological and electrical properties of electrical contact materials. Cao et al [27] used three types of nano-montmorillonite additives to afford lubricating greases.…”

Section: Introductionmentioning

confidence: 99%

Conductive and tribological properties of TiN-Ag composite coatings under grease lubrication

2020

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TiN-Ag composite coatings were prepared by pulsed bias arc ion plating. X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS) were applied to analyze the compositions of the coatings. Tribological properties of the coatings were studied using an MFT-R4000 ball-on-disk friction tester in the presence of lubricating greases containing multilayer graphene. Scanning electron microscopy (SEM), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) were used to analyze the worn surface compositions of the lubricating films. The results show that with the decrease in Ag in the film, hardness increased but electrical conductivity decreased. The coating with 10 at% Ag content shows the best friction-reducing and anti-wear properties, which can be attributed to the moderate content of Ag embedded in the TiN crystal gap that enhanced the grain bonding force to improve the anti-wear and self-lubricating ability. Graphene can be adsorbed on the coating as a solid lubricant.

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Section: Introductionmentioning

confidence: 99%

Conductive and tribological properties of TiN-Ag composite coatings under grease lubrication

2020

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“…Thus, the initiator molecules could be anchored on the surface the materials due to the high concentration of catechol and amine groups on PDA. In addition, it has been recently founded that dopamine could also be used as a reducing agent for GO . In comparison to other reduced procedures, PDA coating is a more green protocol.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, it has been recently founded that dopamine could also be used as a reducing agent for GO. [53][54][55][56] In comparison to other reduced procedures, PDA coating is a more green protocol.…”

mentioning

confidence: 99%

Polymer brushes grafted from graphene via bioinspired polydopamine chemistry and activators regenerated by electron transfer atom transfer radical polymerization

Wang

Meng

et al. 2018

J. Polym. Sci. Part A: Polym. Chem.

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Polymer brushes decorated reduced GO (rGO) with advanced applications have been prepared by bioinspired polydopamine (PDA) chemistry integrated with activators regenerated by electron transfer atom transfer radical polymerization (ARGET‐ATRP) technique. First, rGO/PDA was obtained by the process for graphene oxide (GO) coated with a homogeneous bio‐adhesive PDA layer. Then the initiator 2‐bromoisobutyryl bromide (BIBB) was immobilized on the surface of PDA functionalized rGO. Finally, rGO/PDA‐Br was polymerized with N, N‐diethylaminoethyl methacrylate (DEAEMA) and glycidyl methacrylate (GMA) to obtain rGO/PDA‐g‐polymer brushes by ARGET‐ATRP process. The prepared rGO/PDA‐g‐PGMA brush would be subjected to further functionalization with ethylenediamine (EDA), which would impart the obtained products (rGO/PDA‐g‐PGMA‐NH2) with good adsorption ability toward cationic dyes. The chemical structures and morphologies of the functionalized GO products have been characterized in detail by Fourier transform infrared spectroscopy (FTIR), X‐ray photoelectron spectroscopy (XPS), Raman spectroscopy, thermal gravimetric analysis (TGA), scanning electron microscope (SEM), transmission electron microscope(TEM), and atomic force microscopy (AFM). The distinctive pH‐responsive character of rGO/PDA‐g‐PDEAEMA and adsorption ability of rGO/PDA‐g‐PGMA‐NH2 for cationic dyes have been explored by UV–vis spectrophotometer. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 689–698

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“…For the analysis of PDA, the peaks at 398.7, 399.5, and 400.6 eV are ascribed to imine (N-), secondary amine (-NH-) and primary amine (-NH 2 ), confirming the existence of 5,6-hydroxyindole and 5,6-indolequinone structures of PDA polymers. The peaks at 285.9, 286.4, and 288.5 eV belong to binding energy of C1s of CC, CN, and CO (quinone), [43] further demonstrating the PDA structure. Additionally, the O1s peaks at 531.5 and 532.9 eV are assigned to CO and COH, respectively.…”

Section: Surface Analysismentioning

confidence: 81%

Bioinspired Strategy for HMX@hBNNS Dual Shell Energetic Composites with Enhanced Desensitization and Improved Thermal Property

Zhang

Gao

Jia

et al. 2020

Adv Materials Inter

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tetraoxaisowurtzitane (TEX), [8] and so forth. However, long-terms of researches manifest that there exist two opposite aspects in most HEDMs since the inherent defects of their molecular structures, the contradiction between high energy and low sensitivity. [9,10] Most powerful energetic materials are susceptible to external stimulations, and the investigation and storage of them may bring momentous disaster. Several strategies have been used to address this problem so far, such as designing and synthesizing new energetic compounds, [11-13] morphology optimization of EM, [14] cocrystallization with low sensitivity energetic crystals, [15] and preparing polymer bonded explosive (PBX). [16-18] Among these approaches, PBXs consisting of 90-95 wt% of energetic crystals and 5-10 wt% of polymer binder or other components is facile and efficient, which can combine the merits of polymer materials without destroying the inherent structures of energetic crystals. [19] One of the key indicators evaluating the PBXs is the coverage degree of fillers on energetic crystals, while it is not ideal by the traditional method such as water suspension and kneading. [20] Up to now, it has been proved that in situ polymerization is an important and matured way to construct polymer coated core-shell structures, [21,22] and it is also applied to prepare the core-shell energetic materials. [10,16,20] 1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane (HMX) has been regarded as a kind of high-performance explosive with good thermal stability, high energy and density, and has extensive application in aerospace industry and military engineering. However, the high sensitivity remains the major constraint to its applications. In our previous works, we have prepared the HMX@urea-formaldehyde (UF) composites and HMX@polyaniline (PANI) composites with significant reduced sensitivity via in situ polymerization.

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Electrical and mechanical properties of poly(dopamine)-modified copper/reduced graphene oxide composites

Cited by 48 publications

References 23 publications

Conductive and tribological properties of TiN-Ag composite coatings under grease lubrication

Conductive and tribological properties of TiN-Ag composite coatings under grease lubrication

Polymer brushes grafted from graphene via bioinspired polydopamine chemistry and activators regenerated by electron transfer atom transfer radical polymerization

Bioinspired Strategy for HMX@hBNNS Dual Shell Energetic Composites with Enhanced Desensitization and Improved Thermal Property

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