Raman spectroscopic imaging of graphene dispersion in polymer composites

Shojaee, S.A.; Zandiatashbar, Ardavan; Koratkar, Nikhil; Lucca, D.A.

doi:10.1016/j.carbon.2013.05.068

Cited by 49 publications

(27 citation statements)

References 10 publications

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“…The agglomeration will decrease the interfacial contact area of the graphene filler and reduce its effectiveness in enhancing the mechanical properties of the polymers [30]. In order to disperse and/or exfoliate graphene in polymer matrix, the solution mixing is widely employed [3,27,31,32].…”

Section: Exfoliation and Dispersion Of Mpts-go In Bmimentioning

confidence: 99%

Silane functionalization of graphene oxide and its use as a reinforcement in bismaleimide composites

Zhou

Wang

et al. 2015

J Mater Sci

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Silane-functionalized graphene oxide (GO) nanosheets were synthesized by chemically grafting cmethacryloxypropyltrimethoxysilane (MPTS) onto GO sheets. The resulting MPTS-functionalized GO (MPTS-GO) nanosheets were characterized by Fourier transform infrared spectroscopy, energy dispersive X-ray analysis, X-ray photoelectron spectra, X-ray diffraction, and Raman spectroscopy. Bismaleimide (BMI) composites filled with GO and MPTS-GO were prepared at different filler loading levels. The study showed that the exfoliation and dispersion of graphene sheets in BMI resin were significantly improved due to the surface functionalization effect. The tensile test indicated that the MPTS-GO/BMI nanocomposites showed higher tensile strength and modulus than the neat BMI resin and GO/BMI composites. Meanwhile, the impact strength of composites was also improved. The maximum increment of the tensile strength, tensile modulus, and impact strength of MPTS-GO/BMI nanocomposites were 22.17, 33.05, and 66.64 %, respectively. The fracture surface analysis revealed that the highly dispersed MPTS-GO nanosheets could trigger large-scale plastic deformation of resin matrix.

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Section: Exfoliation and Dispersion Of Mpts-go In Bmimentioning

confidence: 99%

Silane functionalization of graphene oxide and its use as a reinforcement in bismaleimide composites

Zhou

Wang

et al. 2015

J Mater Sci

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“…Raman spectroscopy is capable of identifying the edge effects/defects and chemical composition of the material by recording the presence of specific chemical bonds. The nanofiller dispersion in polymer composites was captured and presented by Shijae et al by scanning the specimen with a Raman beam. They collected 14 400 individual spectra over a 30 × 30‐μm 2 area of the composite and achieved a lateral resolution of 0.36 μm.…”

Section: Introductionmentioning

confidence: 99%

Infrared thermography for void mapping of a graphene/epoxy composite and its full‐field thermal simulation

Manta

Grésil

Soutis

2019

Fatigue Fract Eng Mat Struct

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Important challenges are faced during the manufacturing of graphene nanoplatelet (GNP)/polymer composites, associated with material quality and how to eliminate or reduce fabrication‐induced defects in the effort to improve performance. In the present work, infrared thermography (IRT) is used to measure void content and map void distribution, formed during fabrication of GNP/epoxy nanocomposites. Taking into consideration the size of each pixel (~100 μm), this method enables the non‐destructive detection of flaws with a size of approximately 200 μm. Their effect on thermal conductivity of the nanocomposite is studied by a 3D multiscale finite element analysis. Generic and full‐field comparisons demonstrate a good agreement between measurements and numerical predictions, validating assumptions and simplifications made in the proposed model.

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“…The typical Raman spectrum of a GO film, as expected, displays a prominent G peak at 1350 cm −1 and a D peak at 1670 cm −1 due to sp 2 –hybridized C-C bonds. The Raman spectrum of the PrGO film also contains D, G, and 2D peaks at 1400 cm −1 , 1710 cm −1 , and 2650 cm −1 , respectively1632. PVA/PrGO hybrid films show a 2D peak at 2810 cm −1 (compared with the 2D peak of graphene at 2700 cm −1 ), and 2D peaks of the pointed PVA films generally appear around 2800 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Impermeable flexible liquid barrier film for encapsulation of DSSC metal electrodes

Yang

Min

Yoon

et al. 2016

Sci Rep

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Encapsulation of electronic devices such as dye-sensitized solar cells (DSSCs) is prone to degradation under normal atmospheric conditions, even with hermetic barriers on the metal electrodes. Overcoming this problem is crucial to increasing DSSC lifetimes and making them commercially viable. Herein, we report a new impermeable flexible liquid barrier film using polyvinyl alcohol (PVA) and partially reduced graphene oxide (PrGO), which dramatically enhances the lifetime of Ag metal electrodes (typically used in DSSCs) immersed in a highly acidic iodolyte solution. The Ag metal electrode encapsulated by the PVA/PrGO film survived for over 500 hrs, superior to existing barriers of glass frits, epoxy resins and polymers. The PVA/PrGO film strongly adheres to the Ag metal surface, and the resulting PVA/PrGO/Ag electrode is stable even on a curved substrate, with a sheet resistance nearly independent of curvature. These results give new insight for the design of high-performance and solution-processable flexible liquid barrier films for a wide range of applications, in particular for the encapsulation of electronic devices with liquid electrolytes.

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Raman spectroscopic imaging of graphene dispersion in polymer composites

Cited by 49 publications

References 10 publications

Silane functionalization of graphene oxide and its use as a reinforcement in bismaleimide composites

Silane functionalization of graphene oxide and its use as a reinforcement in bismaleimide composites

Infrared thermography for void mapping of a graphene/epoxy composite and its full‐field thermal simulation

Impermeable flexible liquid barrier film for encapsulation of DSSC metal electrodes

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