Highly conductive graphene by low-temperature thermal reduction and in situ preparation of conductive polymer nanocomposites

Yang, Liping; Kong, Junhua; Yee, Wu Aik; Liu, Wanshuang; Phua, Si Lei; Toh, Cher Ling; Huang, Shuping; Lu, Xuehong

doi:10.1039/c2nr31258a

Cited by 68 publications

(43 citation statements)

References 30 publications

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“…Notably, there was a decrease in the content of C=O species during the PDA coating process ( Figure S2B in the Supporting Information), which implies the potential reduction of GO by the PDA layer. [39] This was further confirmed by XRD and FTIR investigations, as shown in Figure 5. With the PDA adhering on GO, a broad peak at 2q = 24.58 was observed for the PDRGO sample ( Figure 5A, red line), whereas the characteristic diffraction peak of the GO sample at 2q = 11.28 (the (001) peak) disappeared (Figure 5A, black line), which suggests the reductive capacity of the PDA layer.…”

Section: Resultssupporting

confidence: 79%

Self‐Assembled Platinum Nanoflowers on Polydopamine‐Coated Reduced Graphene Oxide for Methanol Oxidation and Oxygen Reduction Reactions

Wang

Guo

et al. 2014

Chemistry An Asian Journal

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The morphology- and size-controlled synthesis of branched Pt nanostructures on graphene is highly favorable for enhancing the electrocatalytic activity and stability of Pt. Herein, a facile approach is developed for the efficient synthesis of well-dispersed Pt nanoflowers (PtNFs) on the surface of polydopamine (PDA)-modified reduced graphene oxide (PDRGO), denoted as PtNFs/PDRGO, in high yield. The synthesis was performed by a simple heating treatment of an aqueous solution that contained K2PtCl4 and PDA-modified graphene oxide (GO) without the need for any additional reducing agent, seed, surfactant, or organic solvent. The coated PDA serves not only as a reducing agent, but also as cross-linker to anchor and stabilize PtNFs on the PDRGO support. The as-prepared PtNFs/PDRGO hybrid, with spatially and locally separated PtNFs on PDRGO, exhibits superior electrocatalytic activity and stability toward both methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) in alkaline solutions.

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Section: Resultssupporting

confidence: 79%

Self‐Assembled Platinum Nanoflowers on Polydopamine‐Coated Reduced Graphene Oxide for Methanol Oxidation and Oxygen Reduction Reactions

Wang

Guo

et al. 2014

Chemistry An Asian Journal

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“…They are required to present very good mechanical properties, stability at extreme conditions, possibilities of self-healing, sensitivity at different atmospheric conditions, electrical or thermal conductivity, etc. It has been used to introduce electrical conductivity, [9][10][11][12][13][14][15][16][17][18][19][20][21]26,[31][32][33] thermal stability, [21][22][23]26,30 flame retardancy, 28,29 or sensing properties, 24 or to improve the mechanical properties, 10,14,[17][18][19][20][21]26,30,32,34 etc. Different shape and morphology nanofillers have been incorporated into polymer matrices, such as spherical nanoparticles: silica, 1-3 titania, 4,5 noble metals, 6 etc; platelet-like two dimensional fillers: clays, 7,8 or graphene; and one dimensional fillers: nanotubes or fibers.…”

Section: Introductionmentioning

confidence: 99%

“…Different shape and morphology nanofillers have been incorporated into polymer matrices, such as spherical nanoparticles: silica, 1-3 titania, 4,5 noble metals, 6 etc; platelet-like two dimensional fillers: clays, 7,8 or graphene; and one dimensional fillers: nanotubes or fibers. 9,11,23,[29][30][31][32][33][34] The in situ polymerization techniques are rather challenging regarding the reproducibility and the control of the product microstructure and properties. It has been used to introduce electrical conductivity, [9][10][11][12][13][14][15][16][17][18][19][20][21]26,[31][32][33] thermal stability, [21][22][23]26,30 flame retardancy, 28,29 or sensing properties, 24 or to improve the mechanical properties, 10,14,[17][18][19][20][21]26,30,32,…”

Section: Introductionmentioning

confidence: 99%

Crosslinked reduced graphene oxide/polymer composites via in situ synthesis by semicontinuous emulsion polymerization

et al. 2015

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This work presents the in situ synthesis of crosslinked polymer/graphene nanocomposites by seeded semicontinuous emulsion polymerization. The OH functionalities on the rGO platelets and in the polymer chains (introduced by functional monomer hydroxylethyl methacrylate) were used as reactive sites, linked by the presence of NCO terminated polyurethane prepolymer (PU). The reaction was performed in semicontinous mode, using rGO and PU dispersed in water as a seed, whereas the monomers preemulsion was fed slowly. The hybrid latexes were kinetically stable enough to produce composite films by water evaporation, in which rGO platelets were uniformly dispersed and incorporated in a permanent way in the polymer matrix. The composites have highly crosslinked structure, the degree of which depends on the loading of rGO and PU e.g., NCO/OH ratio. The electrical conductivity of the composites depends highly on the degree of the crosslinking and the morphology, thus aligned platelets parallel to the top film surface being the most prospective morphology for the electrical conductivity. Determination of viscoelastic properties has shown that the composites are stiffer and contain less amount of mobile neat polymer phase with increasing content of rGO, which agrees well with increasing of their crosslinking.Electronic Supplementary Information (ESI) available: [FTIR spectra of nanocomposites are compared with that of polyurethane prepolymer]. See

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“…Thin films of carbon nanotubes (CNT) [7], graphene nanosheets [8], conductive polymers [9], and metal nanowires [10] have been explored extensively. Among them, CNTs and graphene films were reported with a sheet resistance of 160 X/sq at an average transmittance of 87 % [11], and 300 X/sq at an average transmittance of 80 % [12], respectively.…”

Section: Introductionmentioning

confidence: 99%

Highly bendable, transparent, and conductive AgNWs-PET films fabricated via transfer-printing and second pressing technique

Jing

Chen

et al. 2015

J Mater Sci

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Highly bendable, transparent, and conductive films composed of silver nanowires (AgNWs) network and polyethylene terephthalate (PET) substrate were prepared by a transfer-printing and second pressing technique using different dimensional AgNWs. The performance of the films as a function of optical and bending performances with low sheet resistance is enhanced, by controlling the diameter and length of AgNWs, area density, and the mechanical press condition. With the optimized mean diameter (D) *40 nm and length (L) *15 lm, the asprepared AgNWs-PET film possesses a sheet resistance of 11.5 X/sq, transmittance (T 550 ) of 93.4 %, and haze of 1.23 %. The AgNWs-PET film with the second press treatment at 10 MPa for 20 s shows a very excellent bending performance, with less than 8 % change of the sheet resistance after 46,000 bending cycles without any additional conductive polymer. This highly bendable, transparent, and conductive film is suitable for emerging technologies such as flexible display, electrical skins, and bendable solar cells.

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Highly conductive graphene by low-temperature thermal reduction and in situ preparation of conductive polymer nanocomposites

Cited by 68 publications

References 30 publications

Self‐Assembled Platinum Nanoflowers on Polydopamine‐Coated Reduced Graphene Oxide for Methanol Oxidation and Oxygen Reduction Reactions

Self‐Assembled Platinum Nanoflowers on Polydopamine‐Coated Reduced Graphene Oxide for Methanol Oxidation and Oxygen Reduction Reactions

Crosslinked reduced graphene oxide/polymer composites via in situ synthesis by semicontinuous emulsion polymerization

Highly bendable, transparent, and conductive AgNWs-PET films fabricated via transfer-printing and second pressing technique

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