Epoxy filled with bare and oxidized multi-layered graphene nanoplatelets: a comparative study of filler loading impact on thermal properties

Gorelov, B. M.; Gorb, Alla; Nadtochiy, Andriy; Starokadomsky, D.; Kuryliuk, Vasyl; Sigareva, Nadia; Shul’ga, Sergey V.; Оgenko, V. M.; Korotchenkov, О. A.; Polovina, Oleksiy

doi:10.1007/s10853-019-03523-7

Cited by 20 publications

(9 citation statements)

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“…These may originate from either low mobile macromolecular atomic segments and the absorbed water molecules and/or hydroxyl groups localized on the polymer chains. However, the latter reason appears unlikely due to the fact that the loading with MLGs leads to the essential reduction in the quantity of water molecules and OH groups captured in the epoxy structure [ 33 ]. Additionally, the low-frequency losses increase with increasing

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Section: Resultsmentioning

confidence: 99%

“…The atomic composition of the thermal destruction products of epoxy composites at low MLG loadings has been determined previously using thermal desorption mass spectrometry. It was established that loading polymer with MLGs has no effect on the atomic composition of volatile destruction products, but it changes both the desorption intensity and the outputs of the products [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

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Structural and Dipole-Relaxation Processes in Epoxy–Multilayer Graphene Composites with Low Filler Content

et al. 2021

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Multilayered graphene nanoplatelets (MLGs) were prepared from thermally expanded graphite flakes using an electrochemical technique. Morphological characterization of MLGs was performed using scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), Raman spectroscopy (RS), and the Brunauer–Emmett–Teller (BET) method. DGEBA-epoxy-based nanocomposites filled with synthesized MLGs were studied using Static Mechanical Loading (SML), Thermal Desorption Mass Spectroscopy (TDMS), Broad-Band Dielectric Spectroscopy (BDS), and Positron Annihilation Lifetime Spectroscopy (PALS). The mass loading of the MLGs in the nanocomposites was varied between 0.0, 0.1, 0.2, 0.5, and 1% in the case of the SML study and 0.0, 1.0, 2, and 5% for the other measurements. Enhancements in the compression strength and the Young’s modulus were obtained at extremely low loadings (C≤ 0.01%). An essential increase in thermal stability and a decrease in destruction activation energy were observed at C≤ 5%. Both the dielectric permittivity (ε1) and the dielectric loss factor (ε2) increased with increasing C over the entire frequency region tested (4 Hz–8 MHz). Increased ε2 is correlated with decreased free volume when increasing C. Physical mechanisms of MLG–epoxy interactions underlying the effects observed are discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural and Dipole-Relaxation Processes in Epoxy–Multilayer Graphene Composites with Low Filler Content

et al. 2021

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“…The X-ray diffraction analysis showed that the MLG contain graphene sheets of about 40 single-atom thickness. The additional information can be found elsewhere [10] where preparation technique and morphological studies of MLG have been presented in details.…”

Section: Methodsmentioning

confidence: 99%

Sound Velocities in Graphene-Based Epoxy Nanocomposites

Nadtochiy

Gorelov

Polovina

et al. 2022

Phys. Chem. Solid St.

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Elastic properties of epoxy-based nanocomposites (ENCs) filled with bare and TiO2-deposied multi-layered graphene nanoplatelets (MLG) have been tested by using a phase-frequency continuous-wave ultrasound probing (USP). The dian epoxy CHS-EPOXY 520 curried with diethylenetriamine (DETA) was the polymer matrix for the nanocomposites. The nanoplatelets of the specific surface area Sf ~ 790 m2/g consist of several dozen loosely bound monoatomic graphene layers with an area of about least 5×5 μm2. MLG-mass-loading (φf,m) of the nanocomposites varied from 0.1 % to 5.0 % by weight. Anatase- TiO2 particles, being of about 50 nm in diameter and of Sf ~ 1500 m2/g, have been deposited on MLG in mass concentration of about 1 %. Elastic moduli of the ENCs (namely, the Lame’s constants, the Young’s module, the compression module, and the Poisson’s ratio) have demonstrated negligible variation with φf,m varying regardless the type of filling particles. However, MLG:TiO2-hybrid nanoparticles have proven to impact stronger on the moduli as compared to bare MLG. This result shows a capability to modify molecular structure of epoxy resins by controlling surface reactivity of MLG embedded in the resin.

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“…The search for the optimal filling of epoxides aimed at enhancing their properties is underway [1,2]. The nanobasalt fibers are a sought-after material for the technologically simple amplification of epoxy, polyester, and other mesh polymers.…”

Section: Introductionmentioning

confidence: 99%

Determining the strength and thermal, chemical resistance of the epoxy polymercomposite filled with basalt micronano fiber in the amount of 15–80 % by weight

Rassokhin

Starokadomsky

Ishchenko

et al. 2020

EEJET

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Epoxy filled with bare and oxidized multi-layered graphene nanoplatelets: a comparative study of filler loading impact on thermal properties

Cited by 20 publications

References 120 publications

Structural and Dipole-Relaxation Processes in Epoxy–Multilayer Graphene Composites with Low Filler Content

Structural and Dipole-Relaxation Processes in Epoxy–Multilayer Graphene Composites with Low Filler Content

Sound Velocities in Graphene-Based Epoxy Nanocomposites

Determining the strength and thermal, chemical resistance of the epoxy polymercomposite filled with basalt micronano fiber in the amount of 15–80 % by weight

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Epoxy filled with bare and oxidized multi-layered graphene nanoplatelets: a comparative study of filler loading impact on thermal properties

Cited by 20 publications

References 120 publications

Structural and Dipole-Relaxation Processes in Epoxy–Multilayer Graphene Composites with Low Filler Content

Structural and Dipole-Relaxation Processes in Epoxy–Multilayer Graphene Composites with Low Filler Content

Sound Velocities in Graphene-Based Epoxy Nanocomposites

Determining the strength and thermal­, chemical resistance of the epoxy polymer­composite filled with basalt micronano fiber in the amount of 15–80 % by weight

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Product

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Determining the strength and thermal, chemical resistance of the epoxy polymercomposite filled with basalt micronano fiber in the amount of 15–80 % by weight