The influence of multiscale fillers on the rheological and mechanical properties of carbon-nanotube–silica-reinforced epoxy composite

Rahmanian, S.; Aziz, Sarah; Roshanravan, Bita; Othman, Raja Nor Izawati Raja; Nasser, Ali; Zahari, Rizal; Zainudin, E.S.

doi:10.1016/j.matdes.2015.08.149

Cited by 35 publications

(16 citation statements)

References 35 publications

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“…It might be due to the high aspect ratio of layered structure graphite and higher intrinsic TC of Gr (ie, 400 W/mK), which forms more heat conductive pathways inside the epoxy matrix. The occurrence of layered structures favors in the formation of heat transfer contact channel points, which indicates that the TR of the layer‐structured graphite‐epoxy matrix decreased …”

Section: Resultsmentioning

confidence: 99%

“…However, the viscosity of uncured epoxy resin containing 60 wt% of Gr/h‐BN hybrid filler is 1.4 times higher than epoxy containing 60 wt% of Gr/Ag hybrid filler, 2.8 times higher than epoxy containing 60 wt% of Gr filler, 5.5 times higher than epoxy containing 40 wt% of Gr filler, and 11 times higher than neat epoxy resin at the shear rate of 15 s −1 . This is due to the high internal dispersion of two phases of silver flakes (10 μm) and BN (1 μm) powder in between graphite powder (50 μm) and epoxy chains, thereby increasing the surface area of graphite units within the epoxy matrix for better interaction without any agglomeration . Initially, viscosity profile of hybrid filler–based epoxy resin was higher than single filler–based epoxy resin while increasing shear rate.…”

Section: Resultsmentioning

confidence: 99%

“…As evident from indicates that the TR of the layer-structured graphite-epoxy matrix decreased. 21,22 Hybrid filler incorporated epoxy composites were fabricated using Gr, BN, and Ag flakes. The TC of 60%(Gr/h-BN) + 40%Ep…”

Section: From Equation 2mentioning

confidence: 99%

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Epoxy‐based composite adhesives: Effect of hybrid fillers on thermal conductivity, rheology, and lap shear strength

Kumar

Mishra

Sahoo

et al. 2019

Polymers for Advanced Techs

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Thermal management is an important parameter in an electronic packaging application. In this work, three different types of fillers such as natural graphite powder (Gr) of 50‐μm particle size, boron nitride powder (h‐BN) of 1‐μm size, and silver flakes (Ag) of 10‐μm particle size were used for thermal conductivity enhancement of neat epoxy resin. The thermal properties, rheology, and lap shear strength of the neat epoxy and its composite were investigated. The analysis showed that the loading of different wt% of Gr‐based fillers can effectively increase the thermal conductivity of the epoxy resin. It has also been observed that the thermal conductivity of the hybrid filler (Gr/h‐BN/Ag) reinforced epoxy adhesive composite increased six times greater than that of neat epoxy resin composite. Further, the viscosity of hybrid filler reinforced epoxy resin was found to be increased as compared with its virgin counterpart. The adhesive composite with optimized filler content was then subsequently subjected to determine single lap shear strength. The degree of filler dispersion and alignment in the matrix were determined by scanning electron microscopy (SEM) analysis.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Epoxy‐based composite adhesives: Effect of hybrid fillers on thermal conductivity, rheology, and lap shear strength

Kumar

Mishra

Sahoo

et al. 2019

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…On the other hand, some studies have examined valuable results for nanocomposites comprising two or more geometrically different fillers [24]. For example, an attempt to identify reinforcement effect of hybrid fillers of carbon nanotube -silica within epoxy resin to fabricate a multiscale composite [25]. Moreover, a study revealed that hybrid fillers could offer synergistic effect and cost reduction simultaneously [26].…”

Section: Introductionmentioning

confidence: 99%

Acoustic properties of polyurethane compositions enhanced with multi‐walled carbon nanotubes and silica nanoparticles

Yıldırım

Sancak

Navidfar

et al. 2018

Materialwissenschaft Werkst

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In this study, in order to enhance acoustic properties of polyurethane (PU) foams multi‐walled carbon nanotubes (MWCNT) and/or silica nanoparticles were added to polyol‐isocyanate composition up to 2 wt%, and acoustic properties of polyurethane foam samples with small amount of carbon nanotubes and silica nanoparticles (spherical and/or amorphous types) were determined in the frequency range from 50 Hz up to 6400 Hz. Acoustic properties, especially absorption coefficient of the produced samples were measured for all the prepared samples and results were investigated to come up with the best polyurethane samples that can be applied for sound absorption application at the desired frequency range. It was found that double combination of carbon nanotubes and silica nanoparticles, especially 0.7 wt% carbon nanotubes and 0.2 wt% spherical silica nanoparticle added polyurethane composition has better sound absorption ratio overall all frequencies levels compared to the other samples. Thus, it is possible to obtain polyurethane nanocomposite with a higher amount of carbon nanotube by weight at the same time enhancing sound absorption properties. Moreover, there is a synergic effect between carbon nanotubes and silica nanoparticles when mixed and added into polyurethane matrix at predetermined levels to get enhanced acoustic response with a higher level of carbon nanotube in polyurethane foam.

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“…More specifically, both micro-and nano-scale fillers have been developed as additives to epoxy composites to achieve high performance. Various carbon materials, such as graphene, graphene oxide (GO), carbon nanotubes, chopped fibers, and long fibers, have been used as additives to compensate for the weak and brittle properties of epoxy composites [8][9][10][11]. These carbon materials enhance the properties of epoxy composites by providing support or forming a network structure.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of epoxy composites reinforced with ammonia-treated graphene oxides

Park¹,

Lee²,

Lee³

2017

Carbon letters

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The effects of ammonia-treated graphene oxide (GO) on composites based on epoxy resin were investigated. Ammonia solutions of different concentrations (14-28%) were used to modify GO. Nitrogen functional groups were introduced on the GO surfaces without significant structural changes. The ammonia-treated GO-based epoxy composites exhibited interesting changes in their mechanical properties related to the presence of nitrogen functional groups, particularly amine (C-NH 2 ) groups on the GO surfaces. The highest tensile and impact strength values were 42.1 MPa and 12.3 J/m, respectively, which were observed in an epoxy composite prepared with GO treated with a 28% ammonia solution. This improved tensile strength was 2.2 and 1.3 times higher than those of the neat epoxy and the non-treated GO-based epoxy composite, respectively. The amine groups on the GO ensure its participation in the cross-linking reaction of the epoxy resin under amine curing agent condition and enhance its interfacial bonding with the epoxy resin.

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The influence of multiscale fillers on the rheological and mechanical properties of carbon-nanotube–silica-reinforced epoxy composite

Cited by 35 publications

References 35 publications

Epoxy‐based composite adhesives: Effect of hybrid fillers on thermal conductivity, rheology, and lap shear strength

Epoxy‐based composite adhesives: Effect of hybrid fillers on thermal conductivity, rheology, and lap shear strength

Acoustic properties of polyurethane compositions enhanced with multi‐walled carbon nanotubes and silica nanoparticles

Mechanical properties of epoxy composites reinforced with ammonia-treated graphene oxides

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