Functionalization of Natural Graphite for Use as Reinforcement in Polymer Nanocomposites

Araújo, Rafael S.; Marques, Maria de Fátima Vieira; Jonas, Renato; Grafova, Iryna; Grafov, Andriy

doi:10.1166/jnn.2015.10033

Cited by 5 publications

(5 citation statements)

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“…Here, two G bands observed at 1580 and 1619 cm À1 can be attributed to G bands of exfoliated graphene and stage I FeCl 3 -GIC with strain shift, respectively. 34,35 This difference in band positions arises from the low Fermi energy level of FeCl 3 -GIC due to the charge transfer from graphene (donor) to FeCl 3 (acceptor). 36 Dodecylamine-incorporated FeCl 3 -GIC is thermally exfoliated with heating, and the remaining dodecylamine is completely removed after heating for 2 min at 900 1C, as confirmed by TGA measurements (Fig.…”

Section: Characterization Of the Heat-treated Expanded Graphene Compo...mentioning

confidence: 99%

Electrochemical properties of a thermally expanded magnetic graphene composite with a conductive polymer

Ahmed

Imae

2016

Phys. Chem. Chem. Phys.

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A magnetic graphene composite derived from stage-1 FeCl3-graphite intercalation compounds was thermally treated for up to 75 min at 400 °C or for 2 min at high temperatures up to 900 °C. These heat-treatments of the magnetic graphene composite gave rise to the cubical expansion of graphene with the enlargement of inter-graphene distances. The specific capacitance of the magnetic graphene composite increased upon heating and reached 42 F g(-1) at a scan rate of 5 mV s(-1) in 1.0 M NaCl, after being treated for 2 min at 900 °C. This value corresponds to 840% increase in the capacitance activity superior to that (5 F g(-1)) of the pristine magnetic graphene composite before heat-treatment. This capacitance enhancement can play a significant role in the increase of the surface area that reached 17.2 m(2) g(-1) during the non-defective inter-graphene exfoliation. Moreover, the magnetic graphene composite heated at 900 °C was hybridized with polyaniline by in situ polymerization of aniline to reach a specific capacitance of 253 F g(-1) at 5 mV s(-1). The current procedure of heat-treatment and hybridization with a conductive polymer can be an effective method for attaining a well-expanded magnetic graphene composite possessing an enhanced electrochemical activity with a relatively high energy density (141 W h kg(-1) in 1.0 M NaCl) and an excellent stability (99% after 9000 cycles of 20 A g(-1)).

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Section: Characterization Of the Heat-treated Expanded Graphene Compo...mentioning

confidence: 99%

Electrochemical properties of a thermally expanded magnetic graphene composite with a conductive polymer

Ahmed

Imae

2016

Phys. Chem. Chem. Phys.

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“…[12,13] For example, Geng et al have proposed a surface functionalization technique for the preparation of the functionalized GN, and then, amine and amide functional groups were identified to be present on the functionalized GN. [13] These polar groups on the GN can further serve as the active sites for promoting derivatization reactions, greatly improving the compatibility between the GN and polar polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, covalent functionalization is a very efficient and simple approach to modify the GN . For example, Geng et al have proposed a surface functionalization technique for the preparation of the functionalized GN, and then, amine and amide functional groups were identified to be present on the functionalized GN .…”

Section: Introductionmentioning

confidence: 99%

Morphology and performance of styrene butadiene rubber filled with modified graphite nanoplatelet and carbon black

Chen

Lin

Luo

et al. 2016

Polym. Adv. Technol.

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In our work, effects of 2-mercapto-1-methylimidazole modified graphite nanoplatelet (MMI-GN) and carbon black (CB) on static and dynamic mechanical properties of styrene butadiene rubber (SBR) composites were studied. MMI-GN is synthesized by ball-mill process, and the result reveals that π-π interactions existed between MMI and GN. The results demonstrate that the static and dynamic mechanical performances of SBR/CB/MMI-GN composites are significantly improved over these of SBR/CB and SBR/CB/GN composites. Compared with SBR/CB, the tensile strength, tear strength, and modulus at 300% elongation of SBR/CB/MMI-GN-3 are greatly improved by 45%, 27%, and 4%, respectively. And the rolling resistance of SBR/CB/MMI-GN-3 is reduced by 3.7% with remaining almost unchanged in the wet grip property. The superiority of MMI-GN in the enhancement for the overall performance of SBR/CB composites is attributed to the well dispersion of GN throughout the SBR matrix and the enhanced interfacial interactions between GN and the SBR matrix. This work might expedite synthesis of the graphite-based materials for enhancing rubber composites, and enlarge the potential applications of modified graphite to fabricate the high-performance rubber composites.

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“…Over the last few years, polymers have been most promising materials in the current science and technology due to its high mechanical and thermal properties, high processibility, light weight and low cost . However, the major disadvantage of the polymers is that, most of the polymers are insulating in nature which restricted the application of the polymers in the various fields, such as sensors, aerospace, electronics, device, automobile, electromagnetic interference (EMI) shielding materials, super capacitor, microwave and Li‐ion battery etc. Thus, preparation of conducting polymer has been a great challenge and current science has been turned in new direction.…”

Section: Introductionmentioning

confidence: 99%

High electromagnetic interference shielding with high electrical conductivity through selective dispersion of multiwall carbon nanotube in poly (ε‐caprolactone)/MWCNT composites

Bera

Maiti

Khatua

2015

J of Applied Polymer Sci

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This study presents the preparation of electrically conducting poly(e-caprolactone) (PCL)/multiwall carbon nanotube (MWCNT) composites with very low percolation threshold (p c ). The method involves solution blending of PCL and MWCNT in the presence of commercial PCL beads. The PCL beads were added into high viscous PCL/MWCNT mixture during evaporation of solvent. Here, the used commercial PCL polymer beads act as an 'excluded volume' in the solution blended PCL/MWCNT region. Thus, the effective concentration of the MWCNT dramatically increases in the solution blended region and a strong interconnected continuous conductive network path of CNT2CNT is assumed throughout the matrix phase with the addition of PCL bead which plays a crucial role to improve the electromagnetic interference shielding effectiveness (EMI SE) and electrical conductivity at very low MWCNT loading. Thus, high EMI SE value (23.8 dB) was achieved at low MWCNT loading (1.8 wt %) in the presence of 70 wt % PCL bead and the high electrical conductivity of 2.49310 22 S cm 21 was achieved at very low MWCNT loading (0.15 wt %) with 70 wt % PCL bead content in the composites. The electrical conductivity gradually increased with increasing the PCL bead concentration, as well as, MWCNT loading in the composites.

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Functionalization of Natural Graphite for Use as Reinforcement in Polymer Nanocomposites

Cited by 5 publications

References 0 publications

Electrochemical properties of a thermally expanded magnetic graphene composite with a conductive polymer

Electrochemical properties of a thermally expanded magnetic graphene composite with a conductive polymer

Morphology and performance of styrene butadiene rubber filled with modified graphite nanoplatelet and carbon black

High electromagnetic interference shielding with high electrical conductivity through selective dispersion of multiwall carbon nanotube in poly (ε‐caprolactone)/MWCNT composites

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