Customizing thermally-reduced graphene oxides for electrically conductive or mechanical reinforced epoxy nanocomposites

Vázquez-Moreno, Jose M.; Yuste-Sánchez, V.; Sánchez-Hidalgo, R.; Verdejo, Raquel; López–Manchado, Miguel A.; Fernández‐García, Laura; Blanco, Clara; Menéndez, Rosa

doi:10.1016/j.eurpolymj.2017.05.026

Cited by 24 publications

(17 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result further confirms that a higher pyrolysis temperature is beneficial in removing the oxygen‐containing group on the surface, resulting in increased crystal structure distortion. Furthermore, prominent peaks at 2θ = 44° on both RGO corresponded to the distortion force between graphene layers, and hence, these observations confirmed the formation of RGO from Sengon wood biomass.…”

Section: Resultssupporting

confidence: 69%

Noble‐free oxygen reduction reaction catalyst supported on Sengon wood ( Paraserianthes falcataria L. ) derived reduced graphene oxide for fuel cell application

et al. 2019

View full text Add to dashboard Cite

Summary Reduced graphene oxide (RGO) has progressed as one of key emerging carbon for catalyst support material. As an alternative to the conventional RGO precursor, biomass Sengon wood was converted into RGO for use as a noble metal free catalyst support in oxygen reduction reaction (ORR). This work intends to reveal the applicability of Sengon wood‐derived RGO in anchoring/doping iron and nitrogen particles onto its surface and to study its ORR performance in a half‐cell environment. Thin‐sheet layer and highly defective (ID/IG) was gradually obtained at elevated pyrolysis temperature of Sengon wood graphene oxide (GO) at range 700°C to 900°C. As prepared RGO was further doped into catalyst (Fe/N/RGO) through the same pyrolysis procedure at a selected temperature after mixing the GO powder with iron chloride and different nitrogen precursors (urea, choline chloride, and polyaniline) at a fixed ratio. The ORR activity reached a current density up to 2.43 mA/cm2, which in conjunction with smooth multilayer sheet morphology and high graphitic‐N content as the active sites. Stability analysis indicated an 85% current efficiency and only 0.03 V reduction in onset potential on methanol resistant test for Fe/ChoCl/RGO catalyst. This study revealed that Sengon wood‐derived RGO successfully supported Fe‐N‐C catalyst which showed comparable oxygen reduction activity to Pt/C.

show abstract

Section: Resultssupporting

confidence: 69%

Noble‐free oxygen reduction reaction catalyst supported on Sengon wood ( Paraserianthes falcataria L. ) derived reduced graphene oxide for fuel cell application

et al. 2019

View full text Add to dashboard Cite

show abstract

“…This is due to a higher reduction's temperature; the functional groups can be degraded or eliminated from the GO's surface. A recent study by Vazquez‐Moreno et al showed that the numbers of functional groups in thermally reduced GO decreased with increasing temperature during the thermal reduction process. The authors determined that the content of oxygen was 47.8% for GO, 11.1 and 1.1% for GO reduced at 700 and 1000 °C, respectively.…”

Section: Resultsmentioning

confidence: 97%

“…Therefore, although the functional groups on the surface of the TRGO nanoparticles can affect the interaction with PP and PA6 matrices, BET surface area plays a crucial role in the dispersion of the nanoparticles in the polymer matrices, being the most important factor to be considered. Similar results have been found in the dispersion of TRGO reduced at different temperatures in epoxy resin composites, where BET surface area resulted the key factor for their dispersion .…”

Section: Resultsmentioning

confidence: 97%

“…a and b), more agglomerations are seen in the materials containing TRGO obtained at higher temperature. This is likely due to the fact that the TRGO 600 has a larger BET surface area (304 m 2 /g), allowing the intercalation of the PP's chain between the layers . On the other hand, in PA6/TRGO nanocomposites (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Its high Young's modulus of 1 TPa and the tensile strength of 130 GPa allows to name graphene as the strongest material ever measured. These properties, together with its high specific surface area (~2,630 m 2 /g) and impermeability to gases, show the great potential of graphene to be used as a filler to improve mechanical, barrier, thermal, electrical, and flame retardant properties of polymers, showing a huge potential for application in different industries . Due to all these unique properties, graphene has been often called a “supermaterial” in the world of materials science .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of thermally reduced graphene oxides obtained at different temperatures on the barrier and mechanical properties of polypropylene/TRGO and polyamide‐6/TRGO nanocomposites

et al. 2018

View full text Add to dashboard Cite

Polypropylene (PP) and polyamide‐6 (PA6) nanocomposites containing thermally reduced graphene oxide (TRGO), obtained either at 600°C (TRGO600) or 800°C (TRGO800), were prepared by melt mixing in order to study the effect of the thermal treatments on their barrier and mechanical properties. Transmission electron microscopy images of nanocomposites showed a relative good dispersion of TRGO in polymer matrices with some agglomerations. Differential scanning calorimetry analyses showed a slight reduction in crystallinity for both polymers in the presence of TRGO. The permeability to oxygen and water vapor was decreased in almost all nanocomposites due to a more tortuous path to gas permeation, being more evident for PP/TRGO800. Tensile stress–strain tests showed that all nanocomposites had higher elastic modulus, but PA6/TRGO600 nanocomposites showed better mechanical properties. These findings indicated that TRGO obtained at a higher temperature imparts better barrier and mechanical properties to PP, while TRGO obtained at a lower temperature imparts better barrier and mechanical properties to PA6. POLYM. COMPOS., 40:E1746–E1756, 2019. © 2018 Society of Plastics Engineers

show abstract

Epoxy Nanocomposites Filled with Carbon Nanoparticles

Martin-Gallego

Yuste-Sánchez

Sánchez-Hidalgo

et al. 2018

The Chemical Record

Self Cite

View full text Add to dashboard Cite

Over the past decades, the development of high performance lightweight polymer nanocomposites and, in particular, of epoxy nanocomposites has become one the greatest challenges in material science. The ultimate goal of epoxy nanocomposites is to extrapolate the exceptional intrinsic properties of the nanoparticles to the bulk matrix. However, in spite of the efforts, this objective is still to be attained at commercially attractive scales. Key aspects to achieve this are ultimately the full understanding of network structure, the dispersion degree of the nanoparticles, the interfacial adhesion at the phase boundaries and the control of the localization and orientation of the nanoparticles in the epoxy system. In this Personal Account, we critically discuss the state of the art and evaluate the strategies to overcome these barriers.

show abstract

Customizing thermally-reduced graphene oxides for electrically conductive or mechanical reinforced epoxy nanocomposites

Cited by 24 publications

References 29 publications

Noble‐free oxygen reduction reaction catalyst supported on Sengon wood ( Paraserianthes falcataria L. ) derived reduced graphene oxide for fuel cell application

Noble‐free oxygen reduction reaction catalyst supported on Sengon wood ( Paraserianthes falcataria L. ) derived reduced graphene oxide for fuel cell application

Effect of thermally reduced graphene oxides obtained at different temperatures on the barrier and mechanical properties of polypropylene/TRGO and polyamide‐6/TRGO nanocomposites

Epoxy Nanocomposites Filled with Carbon Nanoparticles

Contact Info

Product

Resources

About