Study of low weight percentage filler on dielectric properties of MCWNT-epoxy nanocomposites

Trihotri, Manindra; Dwivedi, Umesh Kumar; Malik, М. M.; Haque, Fozia Z.; Qureshi, M.S.

doi:10.1142/s2010135x16500247

Cited by 9 publications

(4 citation statements)

References 41 publications

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“…At 50 Hz and 200 °C, TiO 2 increases the permittivity more than three times, but the effect is null at 20 °C [ 35 ]. At 100 °C, the permittivity of the nanocomposite increases with the amount of added MWCNT [ 62 ].…”

Section: Resultsmentioning

confidence: 99%

Effect of Gold Nanoparticles on the Physical Properties of an Epoxy Resin

Fraga

Carrillo

Vázquez-Tato

et al. 2023

IJMS

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The effect of doping the bisphenol A diglycidyl ether (DGEBA)/m-xylylenediamine (mXDA) system with gold nanoparticles (AuNP) has been studied with differential scanning calorimetry (DSC), thermogravimetric analysis, dynamic mechanical analysis (DMA), and dielectric analysis (DEA). The evolved heat (ΔHt), the glass transition temperature (Tg), and the associated activation energies of this relaxation process have been determined. Below a certain concentration of AuNPs (=8.5%, in mg AuNP/g epoxy matrix), Tg decreases linearly with the concentration of AuNPs, but above it, Tg is not affected. The degree of conversion α of this epoxy system was analyzed by the semiempirical Kamal’s model, evidencing that diffusion correction is required at high values of α. Activation energy values suggest that AuNPs can cause some impediments at the beginning of the crosslinking process (n-order mechanism). The slight difference between the initial decomposition temperature, as well as the temperature for which the degradation rate is at a maximum, for both systems can be accepted to be within experimental error. Mechanical properties (tension, compression, and bending tests) are not affected by the presence of AuNPs. Dielectric measurements show the existence of a second Tg at high temperatures, which was analyzed using the Tsagarapoulos and Eisenberg model of the mobility restrictions of network chains bound to the filler.

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Section: Resultsmentioning

confidence: 99%

Effect of Gold Nanoparticles on the Physical Properties of an Epoxy Resin

Fraga

Carrillo

Vázquez-Tato

et al. 2023

IJMS

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“…Though their basic structures differ, these two nanofillers have remarkable intrinsic qualities, and the primary goal of mixing them was to generate synergistic effects with the two fillers [13]- [15]. Several researchers in recent investigations also reported an improvement of thermal properties in their observations [16]- [19]. The strong covalent connections formed between the nanofillers and polymer chains in nanocomposites give them outstanding thermal characteristics.…”

Section: Introductionmentioning

confidence: 99%

“…The strong covalent connections formed between the nanofillers and polymer chains in nanocomposites give them outstanding thermal characteristics. MWCNT posses electrical conductivity of 0.5S/m, tensile strength of 63GPa, and youngs modulus of 950GPa [19]- [22], whereas, GNP has 6×10 5 S/m, 130GPa and 1TPa respectively. The thermal conductivity of GNP is 290-380 Wm -1 K -1 [29], [30].…”

Section: Introductionmentioning

confidence: 99%

“…Several researchers used DSC and TGA to examine the thermal stability of GFRP composites [25]- [29]. The DSC results of epoxy composites modified with GNP [29], [30], MWCNT [19]- [22] and ATH [30]- [33] were reported in the literature. In this research paper, a comparative study on the experimental results of composites containing ATH, MWCNT and GNP is carried with the values reported in literature.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study on the Effect of Aluminium Trihydrate and Carbon Nanofillers on Thermal Properties of Glass Fiber Reinforced Epoxy Composites

Madhu¹,

Rashmi²,

Sailaja

et al. 2022

jmmf

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High performance glass fiber reinforced epoxy composites are in greater demand in several industrial applications, from civil structures to aviation industry. The epoxy has highly cross-linked structure and is found to be high performance polymer. Further, carbon nanofillers such as multi-walled carbon nanotubes (MWCNT), graphene nanoplatelets (GNP) and thermally stable microfiller aluminium trihydrate (ATH) are being used to improve the thermal properties. GNP and MWCNT posses high aspect ratio and specific surface area contributing to improvement in thermal properties of composites. In spite of this, there are difficulties connected with nanofiller addition, such as dispersion and interaction. The fabricated nanocomposites are based on ECR glass fiber and epoxy resin by adding GNP, MWCNT and ATH fillers using pultrusion process assisted by ultrasonication. For the purpose of comparison, composites containing only MWCNT, GNP and ATH were also tested. The XRD and SEM were used to study the fillers dispersion and interaction. The thermogravemetric analysis(TGA) was carried out to determine the thermal stability of composites. From the thermal analysis result, it is found that the epoxy-MWCNT-GNP-ATH composite has enhanced thermal stability due to the addition of ATH micro filler.

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Combined effect of multiwalled carbon nanotubes, graphene nanoplatelets, and aluminum trihydride on the thermal stability of epoxy composites

Bhaskaran¹,

Rashmi²,

Sailaja

et al. 2021

Polymer Composites

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Glass fiber reinforced epoxy matrix is modified with a hybrid combination of fillers, and composites were fabricated using the advanced pultrusion technique. The focus of the investigation was to comprehensively understand the synergy between the carbon nanofillers and the role of aluminum trihydride on the thermal characteristics. A ratio of 2 wt% of multiwalled carbon nanotubes and 3 wt% of graphene is established by prior optimization technique for improved thermal properties. Using X‐ray diffraction analysis, the presence of the two carbon fillers was confirmed. Aluminum trihydrate was incorporated in the epoxy matrix with the objective of improving the thermal properties. By thermogravimetric analysis and differential scanning calorimetry, assessment of the thermal properties of the composites has been undertaken. The use of the two carbon fillers leads to enhancement of the thermal properties and contrary to expectations, the composites with hybrid fillers undergo minimal degradation due to pyrolysis. Uniform dispersion of the nanoparticles and good interfacial bonding of fillers with the epoxy are observed to be critical for the enhancement of thermal properties. The ratio of the two carbon fillers used helps in their preferential alignment and hence significant improvements in thermal properties are observed. Glass transition temperature reveals a 13°C increase increases due to the inclusion of carbon nanofillers and aluminum trihydride.

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Study of low weight percentage filler on dielectric properties of MCWNT-epoxy nanocomposites

Cited by 9 publications

References 41 publications

Effect of Gold Nanoparticles on the Physical Properties of an Epoxy Resin

Effect of Gold Nanoparticles on the Physical Properties of an Epoxy Resin

Comparative Study on the Effect of Aluminium Trihydrate and Carbon Nanofillers on Thermal Properties of Glass Fiber Reinforced Epoxy Composites

Combined effect of multiwalled carbon nanotubes, graphene nanoplatelets, and aluminum trihydride on the thermal stability of epoxy composites

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