Investigation of Thermostability of Modified Graphene Oxide/Methylsilicone Resin Nanocomposites

Yin, Yue; Jiang, Bo; Zhu, Xiaofei; Ling-hui, Meng; Huang, Yongbo

doi:10.30919/es8d762

Cited by 20 publications

(15 citation statements)

References 4 publications

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“…The mass loss of GO − CaPi is 9.6% which is much lower than that of GO and CaPi. The result shows that the thermal stability of GO − CaPi is improved and only a little amount of labile oxygenated groups and organic molecule are decomposed 47 . It further confirms that the oxygenated groups on GO surface chemically react with CaPi.…”

Section: Resultsmentioning

confidence: 60%

Combined effect of chemically compound graphene oxide‐calcium pimelate on crystallization behavior, morphology and mechanical properties of isotactic polypropylene

Zhang

Lin

2020

Polymers for Advanced Techs

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The combined nucleation effect of graphene oxide (GO) and calcium pimelate (CaPi) which are chemically compound together (expressed in GO − CaPi) in isotactic polypropylene (iPP) was investigated. Fourier transform infrared (FTIR), X‐ray diffraction (XRD) and thermogravimetric analysis (TGA) verified that CaPi was chemically compound with GO by chelate bonds. The crystallization behavior and crystalline morphologies of iPP nucleated with different mass ratio of GO and CaPi were investigated. The crystallization peak temperature of iPP nucleated with 0.2 wt% GO − CaPi with the mass ratio of 1:5 (GO1 − C5) was increased by 8.3°C when compared with that of pure iPP, and the relative content of β‐crystal reached up to 0.7962. Whereas, the crystallization peak temperature of iPP nucleated with 0.2 wt% GO and CaPi which are blended together by mechanical force (expressed in GO + CaPi) with the mass ratio of 1:5 (GO1 + C5) was only increased by 5.0°C. It was attributed to that the aggregation of GO + CaPi caused the decrease of the crystallization peak temperature, while the GO1 − C5 uniformly dispersed in the iPP matrix. Unexpectedly, the relative content of β‐crystal of iPP nucleated with 0.02 wt% GO1 − C5 reached up to 0.8094, and the crystallization peak temperature was increased by 6.7°C compared with that of pure iPP. Meanwhile, the impact strength, tensile strength and heat deflection temperature of iPP nucleated with 0.02 wt% GO1 − C5 increased by almost 45.86%, 2.03% and 7.7°C, respectively. The iPP nucleated with GO1 − C5 obtained a balance between stiffness and toughness and the thermo‐mechanical property of nucleated iPP was improved.

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Section: Resultsmentioning

confidence: 60%

Combined effect of chemically compound graphene oxide‐calcium pimelate on crystallization behavior, morphology and mechanical properties of isotactic polypropylene

Zhang

Lin

2020

Polymers for Advanced Techs

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“…Recently, GO-based nanocomposites have found various applications in many fields due to its active surface functional groups and unique two-dimensional structure [14]- [16]. Of particular note is that there is a growing interest in the tuning of the material conductivity by GO filler [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Improved Electric Field Distribution Within Bushing Insulation by EP/GO Nanocomposites With Reduced Temperature Coefficient of Conductivity

Sun

Kong

et al. 2020

IEEE Access

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Field grading within the dry-type bushing insulation presents a major challenge for DC applications due to the highly temperature-dependent conductivity of the epoxy resin insulation. An electric field regulation method based on the epoxy/graphene oxide (EP/GO) nanocomposites with the reduced temperature coefficient of conductivity is proposed and investigated in this paper. DC conductivity of EP/GO nanocomposites with different loadings of 0, 0.05, 0.1 and 0.5 wt% at various temperature are investigated. Trap level distributions are characterized by the isothermal discharge current (IDC) method to clarify the conduction mechanism. Obtained results show that more shallower traps are introduced and the thermal activation energies of the nanocomposites are reduced by the GO nanoparticles, indicating that the temperature coefficient of conductivity of the nanocomposites is reduced. The improvement of electric field distribution within the bushing insulation under operating voltage is verified when the EP/GO nanocomposite with an appropriate content is employed, based on an established ±800 kV valve-side bushing for a converter transformer. However, more defects will be introduced by the GO fillers with excessive content (0.5 wt%), resulting in an obvious reduction of the DC breakdown strength. INDEX TERMS Valve-side bushing, electric field regulation, temperature coefficient of conductivity, graphene oxide, epoxy-based nanocomposites.

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“…The use of carbon‐based nanofillers in polymer membranes has gained a huge attention, 1‐4 in particular, carbon nanotubes and graphene‐based nanomaterials have found increasing attraction in polymer modification fields including thermal conductivity and stability, self‐healing polymers, aerogels and 3D networks, gas separation, energy storage devices, anti‐corrosion and other coatings industry, and so on 5‐14 . The performance of these membranes has revealed high water fluxes and considerable rejection levels against both organic and inorganic solids 15‐18 .…”

Section: Introductionmentioning

confidence: 99%

Investigation of electric field‐aligned edge‐oxidized graphene oxide nanoplatelets in polyethersulfone matrix in terms of pure water permeation and dye rejection

Besharat

Manteghian

Russo

et al. 2020

Polymers for Advanced Techs

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Herein, we have evaluated the impact of orientated edge‐oxidized graphene oxide nanoplatelets (EOGO) in polyether sulfone (PES) membrane on the pure water permeability (PWP) and organic dye molecule rejection values. Aligned PES/EOGO nanocomposite films were prepared through electric field induction. Morphological, structural, and chemical‐physical characterizations including atomic force microscopy, thermogravimetric analysis (TGA), contact angle, zeta potential, porosity, and PWP measurements were carried out. The results revealed successful aligned/oriented PES/EOGO nanocomposite formation at low‐to‐moderate EOGO loadings. Membrane function tests demonstrated an increase in water permeability at higher EOGO contents, up to 0.5 wt%, followed by a decrease at 1 wt% nanoplatelets due to nanoparticles agglomeration. The horizontal electric field (1000 Hz) processed samples indicated lower PWP in comparison with their vertical‐field (34% decrement) and No‐field (29% increment) counterparts as well as a better dye molecule rejection at 0.1 wt%, referring to nanoplatelets successful alignment at this loading level.

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Investigation of Thermostability of Modified Graphene Oxide/Methylsilicone Resin Nanocomposites

Cited by 20 publications

References 4 publications

Combined effect of chemically compound graphene oxide‐calcium pimelate on crystallization behavior, morphology and mechanical properties of isotactic polypropylene

Combined effect of chemically compound graphene oxide‐calcium pimelate on crystallization behavior, morphology and mechanical properties of isotactic polypropylene

Improved Electric Field Distribution Within Bushing Insulation by EP/GO Nanocomposites With Reduced Temperature Coefficient of Conductivity

Investigation of electric field‐aligned edge‐oxidized graphene oxide nanoplatelets in polyethersulfone matrix in terms of pure water permeation and dye rejection

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