Gas barrier properties of oxyfluorinated graphene filled polytetrafluoroethylene nanocomposites

Rooyen, L.J. van; Bissett, H.; Khoathane, M. C.; Karger‐Kocsis, J.

doi:10.1016/j.carbon.2016.07.063

Cited by 26 publications

(8 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, for many systems, the morphology obtained is significantly different from the ideal morphology (e.g., fully exfoliated structures lying in the plane of the film). Very often, all the dispersed objects are not perfectly lying perpendicular to the gas flow . Furthermore, in many cases, the dispersed objects do not have the same size due to the coexistence of exfoliated and intercalated structures .…”

Section: Modeling Approachesmentioning

confidence: 99%

Modeling diffusion mass transport in multiphase polymer systems for gas barrier applications: A review

Zid

Zinet

Espuche

2018

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

Polymer nanocomposites offer a great interest as gas barrier materials because of their much-enhanced properties arising from the nanoparticles shape, size, and spatial arrangement within the matrix. However, optimization and further development of such materials requires fundamental understanding of the influence of the nanocomposite structure on permeating gas diffusion. This step can be greatly facilitated through modeling/simulation strategies able to establish relationships between the material microstructure and the achieved enhancement of barrier properties. This review first presents the analytical models developed to estimate the effective diffusivity in polymer nanocomposites. The predictions of the models are analyzed with respect to experimental data reported in the literature and their ability to describe accurately the nanocomposite transport properties when the microstructure complexity increases is discussed. Then, modeling approaches based on numerical simulation techniques (e.g., the finite element method) that allow simulating the diffusion processes and assessing the effect of filler shape, orientation, dispersion, and spatial arrangement are reviewed and discussed. Finally, the importance of 3D simulation strategies for the understanding and prediction of transport properties in the most complex nanocomposite microstructures is addressed.

show abstract

Section: Modeling Approachesmentioning

confidence: 99%

Modeling diffusion mass transport in multiphase polymer systems for gas barrier applications: A review

Zid

Zinet

Espuche

2018

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

show abstract

“…Graphene is a kind of two-dimensional layered material with an exceptionally high Young’s modulus of ~ 1.0 Tpa, ultrahigh thermal conductivity of ~ 5000 W/(m · K), high transmittance of 97.7%, high intrinsic mobility of ~ 200,000 cm 2 /(V · s), and extremely high resistance to gas permeation [ 1 – 3 ]. Because of these outstanding properties, graphene has great potential for many applications including sensors, electronic devices, advanced polymer nanocomposites, energy storage, solar cells, smart coatings, ultrafast lasers, catalysis, and biological labeling [ 2 , 4 – 6 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Tip Sonication Parameters on Liquid Phase Exfoliation of Graphite into Graphene Nanoplatelets

Jiang

Zhang

2018

Nanoscale Res Lett

View full text Add to dashboard Cite

Graphene nanoplatelets (GNPs) can be produced by exfoliating graphite in solvents via high-power tip sonication. In order to understand the influence of tip sonication parameters on graphite exfoliation to form GNPs, three typical flaked graphite samples were exfoliated into GNPs via tip sonication at power of 60, 100, 200, or 300 W for 10, 30, 60, 90, 120, or 180 min. The concentration of GNP dispersions, the size and defect density of the produced GNPs, and the sedimentation behavior of GNP dispersions produced under various tip sonication parameters were determined. The results indicated that the concentration of the GNP dispersions was proportional to the square root of sonication energy input (the product of sonication power and time). The size and ID/IG values (determined by Raman spectrum) of GNPs produced under various tip sonication powers and times ranged from ~ 1 to ~ 3 μm and ~ 0.1 to ~ 0.3, respectively, which indicated that all the produced GNPs were of high quality. The sedimentation behavior of GNP dispersions showed that the dispersions were favorably stable, and the concentration of each GNP dispersion was ~ 70% of its initial concentration after sedimentation for 96 h. Moreover, the TEM images and electron diffraction patterns were used to confirm that the produced GNPs were few-layer. This study has important implications for selecting the suitable tip sonicating parameters in exfoliating graphite into GNPs.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2648-5) contains supplementary material, which is available to authorized users.

show abstract

“…For instance, recent study by Raine et al noted a drastic reduction in permeability of supercritical fluids such as hydrogen sulphide (H2S) and carbon dioxide (CO2) [61]. Also, studies by Rooyen et al [62] showed that graphene is capable of reducing helium (He) permeability by 88% -96% when used as nanofiller in polymer matrix. Several other studies have also reported remarkable barrier characteristics of graphene across various gaseous particulates such as oxygen [63], [64], nitrogen, methane [65], water vapour [66], [67] and fuel-vapour transmission [68].…”

Section: Intrinsic Properties Of Graphenementioning

confidence: 99%

Graphene and water-based elastomer nanocomposites – a review

2021

View full text Add to dashboard Cite

show abstract

Gas barrier properties of oxyfluorinated graphene filled polytetrafluoroethylene nanocomposites

Cited by 26 publications

References 59 publications

Modeling diffusion mass transport in multiphase polymer systems for gas barrier applications: A review

Modeling diffusion mass transport in multiphase polymer systems for gas barrier applications: A review

Effects of Tip Sonication Parameters on Liquid Phase Exfoliation of Graphite into Graphene Nanoplatelets

Graphene and water-based elastomer nanocomposites – a review

Contact Info

Product

Resources

About