Preparation and dielectric behavior of epoxy resin containing graphene oxide

Mancinelli, Paolo; Fabiani, Davide; Saccani, Andrea; Toselli, Maurizio; Heid, Thomas; Fréchette, M.F.; Savoie, S.; David, Éric

doi:10.1109/icsd.2013.6619697

Cited by 10 publications

(6 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of destructive characterization methods (tensile testing), prior to the postcuring, new samples were prepared. It is worthy of note that, in the case of nanocomposite samples, there was a considerable colour change from brown to black after the post-curing, something that has been observed before and associated with reduction in the GO [6,30,31].…”

Section: Epoxy Nanocomposite Preparationmentioning

confidence: 76%

“…For this, GO was synthesized using methods based on the process introduced by Tour et al [18] in order to achieve high functionalization densities and was subsequently incorporated into a simple epoxy system. Characterization was conducted before and after a post-curing thermal treatment, in line with studies reported elsewhere [30][31][32], in order to understand the reactions between the GO surface chemistry and the epoxy matrix.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Understanding the cross-linking reactions in highly oxidized graphene/epoxy nanocomposite systems

et al. 2018

View full text Add to dashboard Cite

Graphene oxide (GO) was produced using acidic graphite oxidation and dispersed within an epoxy matrix using a solvent-based technique, to give nanocomposites containing up to 2 wt% of GO. Transmission and scanning electron microscopy revealed a fine dispersion of graphitic sheets which alters the nanocomposite's fractured surface morphology, while Fourier transform infrared spectroscopy revealed an excess of epoxide groups in the system, which are associated with the included GO. These additional moieties react with hardener amine groups and, consequently, displace the reaction stoichiometry away from the optimum. The result of this is a change in the network architecture and, in particular, the introduction of epoxy-terminated branches, which modify the dielectric c relaxation. During post-curing, hydroxyl groups on the GO surface react with residual epoxide groups through etherification reactions, to give a marked increase in the glass transition temperature. These reactions lead to increased interfacial interactions between the GO and the matrix, which contribute to an increase in tensile performance. In addition, post-curing also reduces the defect content within the GO lattice which, in turn, increases the electrical conductivity, dielectric permittivity and low frequency losses of the system. Associated chemical pathways are proposed.

show abstract

Section: Epoxy Nanocomposite Preparationmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Understanding the cross-linking reactions in highly oxidized graphene/epoxy nanocomposite systems

et al. 2018

View full text Add to dashboard Cite

show abstract

“…RESULTS Table I presents DSC Tg values for all samples, which are considered reasonable for this epoxy resin [8]. It can be seen that the incorporation of GO powder inside the epoxy resin does not provide any significant alteration in the Tg of the system.…”

Section: Characterizationmentioning

confidence: 94%

“…Next, the resulting solid samples were taken out of the molds, placed back into the fan oven and post cured at 125 o C for 3 h and, again, left to cool down slowly. The beneficial effect of post curing treatment on GO/epoxy nanocomposites is discussed elsewhere [8]. Finally, the samples were stored inside a desiccator to prevent uptake of ambient moisture from the environment.…”

Section: B Sample Preparationmentioning

confidence: 99%

Improved lightning protection of carbon fiber reinforced polymer wind turbine blades: Epoxy/graphene oxide nanocomposites

Vryonis

Andritsch

Vaughan

et al. 2016

2016 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

View full text Add to dashboard Cite

Abstract-Nanodielectric composites belong to a type of materials engineered for improved performance in several different fields. Advanced technology devices require a new class of materials, combining suitable electrical and thermal properties, as well as, mechanical performance and easy processing. In nanocomposites, a key parameter is the interaction between the matrix and the nanofiller. In the present work, the effect of filler load of graphene oxide (GO), on the thermal and electrical response of epoxy-based nanocomposites was investigated. The final goal of the project is to develop epoxy nanocomposite systems which will meet the requirements to be utilized as a matrix, in carbon fiber reinforced polymer (CFRP) wind turbine blades with improved lightning protection performance. It was found that a filler load of 3 wt% leads to percolation threshold. The dielectric spectroscopy results confirm the percolation and also show inert dipoles with increasing filler load. The high filler load leads also to lower impulse breakdown strength. The thermal response is affected by the oxygen-based groups of the GO. It was also found that the dispersion/exfoliation method used affects the response of the epoxy resin.

show abstract

“…A fairly good GO dispersion has been already obtained into epoxy through ultrasonication of GO powder [2]. Actually GO hydrophilicity allows this material to exfoliate completely into polar solutions.…”

Section: Introductionmentioning

confidence: 99%

Thermal in situ reduction of graphene oxide in epoxy-based nanodielectrics: Influence on dielectric properties

Mancinelli

Heid

Fabiani

et al. 2013

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

Self Cite

View full text Add to dashboard Cite

Graphene oxide (GO) water solution has been added and mixed to epoxy resin. Water has been evaporated at low pressure and the resulting mixture has been cured through an amine. Heating GO-epoxy samples at 130 °C in situ chemical reduction of GO has been carried out. Dielectric constant of these graphene-based samples shows an increase of more than 50% compared to neat epoxy even for 0.3 wt% of GO dispersed into the matrix. This procedure may open a new way on tuning electrical properties of insulating materials.

show abstract

Preparation and dielectric behavior of epoxy resin containing graphene oxide

Cited by 10 publications

References 9 publications

Understanding the cross-linking reactions in highly oxidized graphene/epoxy nanocomposite systems

Understanding the cross-linking reactions in highly oxidized graphene/epoxy nanocomposite systems

Improved lightning protection of carbon fiber reinforced polymer wind turbine blades: Epoxy/graphene oxide nanocomposites

Thermal in situ reduction of graphene oxide in epoxy-based nanodielectrics: Influence on dielectric properties

Contact Info

Product

Resources

About