Enhanced thermal conductivity of graphene nanoplatelets epoxy composites

Jarosinski, Lukasz; Rybak, Andrzej; Gąska, Karolina; Kmita, Grzegorz; Porębska, R.; Kapusta, Cz.

doi:10.1515/msp-2017-0028

Cited by 57 publications

(42 citation statements)

References 32 publications

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“…Notably, an enhanced thermal conductivity of the corresponding epoxy composites was demonstrated upon incorporation of graphene nanoplatelets. As a consequence, these fillers have thus a huge potential for applications in electrical insulation with enhanced thermal conductivity . Composites prepared are also lightweight and easily processed.…”

Section: Methodsmentioning

confidence: 99%

Fillers as Heaters for Photothermal Polymerization upon NIR Light

Bonardi

Dumur

et al. 2019

Macromol. Rapid Commun.

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into a highly crosslinked solid polymer. It allows the fabrication of a large range of materials, for example, coatings, inks, paints, adhesives, composites, 3D-printed objects. However, a strong limitation of the photopolymerization technology is the low UV light penetration for the curing of filled samples and in particularly for the access to composites. [1,2] In a recent paper, we have proposed the photothermal polymerization as a first answer to overcome the problem of composites polymerization. [3] In this work, the use of a near-infrared (NIR) light rather than a UV light was proposed, even if the UV light remains extensively used in industrial photopolymerization. As a specificity of the NIR light, this wavelength range allows a deeper light penetration inside the reaction media and especially for resins containing high contents of fillers. Initiation of the polymerization process was proposed, thanks to a unique combination of a thermal initiator and an organic molecule. The dyes proposed in this work were mostly based on the cyanine scaffold and could act as a light-to-heat convertor (NIR heater).The mechanisms of light-to-heat conversion is extensively described in the literature for phototherapy applications. [4] Various organic absorbers are known in the literature to be efficient for light-to-heat conversion. However, light-to-heat conversion is not restricted to organic absorbers and metal components or mineral fillers can also be used. As metal components, gold nanoparticles are often used. [5] But graphene oxide is also described in the literature. [6] In recent and elegant works, freeradical polymerization initiated by carbon black nanoparticles as NIR heaters has been reported. [7] However, with carbon black particles, the photothermal polymerization was much less efficient that with organic NIR dyes, for example, IR-780 borate. [3] In this communication, we propose the use of different other fillers as heaters for the polymerization of methacrylate upon NIR light exposure and compare their ability to an organic dye. The different fillers used in this work are as follows: multiwalled carbon nanotube, graphene nanoplatelets, graphene oxide and silicon carbide. These fillers are already commonly used for composites manufacturing in industry.Multi-walled carbon nanotubes are fillers that exhibit unique electronic and mechanical properties. More precisely, these compounds are characterized by their low density, high elastic modulus, strengths 10-100 times higher than that of the Photo-induced thermal polymerization upon near-infrared (NIR) light irradiation has been reported in the literature. In this approach, a component able to convert the NIR light into heat must be used in combination with a thermal initiator to initiate the free-radical polymerization of (meth)acrylates. In recent studies, some absorbers have been presented as very efficient heat generators (called heaters). In the present work, different fillers are investigated as heaters and compared to organic NIR absorbers. An alkoxyamin...

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Section: Methodsmentioning

confidence: 99%

Fillers as Heaters for Photothermal Polymerization upon NIR Light

Bonardi

Dumur

et al. 2019

Macromol. Rapid Commun.

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“…Average values were calculated from four measurements. Filler sedimentation effect and homogeneity of filler distribution can be observed due to fact that samples can be measured in different positions .…”

Section: Methodsmentioning

confidence: 99%

“…Another kind of HTC material is graphene and even a small addition of graphene flakes result in both thermal and mechanical properties enhancement . Unfortunately, graphene possesses high electrical conductivity and there is a risk of losing the required dielectric properties of the composite .…”

Section: Introductionmentioning

confidence: 99%

Aluminosilicate‐epoxy resin composite as novel material for electrical insulation with enhanced mechanical properties and improved thermal conductivity

Rybak

Nieroda

2018

Polymer Composites

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Material used as an electrical insulation has to combine many features, mainly dielectric, mechanical, and thermal parameters should be preserved. Appropriately selected polymer matrix and a suitable filler allow to obtain a multifunctional material for electrical devices. In the presented work, different types of commercial aluminosilicate fillers were used in order to obtain electrical insulation with enhanced properties in relation to reference silica‐epoxy resin composite. Thermal conductivity, mechanical parameters, dielectric properties and structure‐properties relationship were studied in order to examine the influence of size, amount and type of silanization of the filler. Composites filled with aluminosilicates exhibit much better mechanical properties as well as enhanced dielectric properties with 61% relative increase of thermal conductivity when they were compared with silica‐epoxy resin sample. The obtained results indicate that aluminosilicates are very attractive fillers for epoxy‐based composites used as an electrical insulation in power devices. POLYM. COMPOS., 40:3182–3188, 2019. © 2018 Society of Plastics Engineers

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“…Jarosinski et al, [10] examined the possibility of increasing the thermal conductivity of the filled epoxy resin systems, applicable for el the use of composites filled with graphene nanoplatelets. It is remarkable that the addition of only 4 wt.% of graphene could lead to 132 % increase in thermal conductivity.…”

Section: Literature Reviewmentioning

confidence: 99%

Review on Recent Advancements in the Field of Reinforced Epoxy Nano Composits

Sandesh¹,

Mahesh²,

Muralidhara³

2018

IJTSRD

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Composite materials especially the polymer matrix materials are well acknowledged for their applications in aerospace, automotive and structural applications. They are considerably light weight and offers high strength weight ratio. Epoxy is one of the widely used matrix material in PMCs (Polymer matrix composite) due to its exceptional bonding capabilities, it finds applications in the field of coating, adhesives and composite materials. Graphene is a novel material in the field of composite materials it offers high strength, very high electrical conduction and heat tr composites of Epoxy and Graphene hybrids exhibit very high mechanical and thermal properties.

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Enhanced thermal conductivity of graphene nanoplatelets epoxy composites

Cited by 57 publications

References 32 publications

Fillers as Heaters for Photothermal Polymerization upon NIR Light

Fillers as Heaters for Photothermal Polymerization upon NIR Light

Aluminosilicate‐epoxy resin composite as novel material for electrical insulation with enhanced mechanical properties and improved thermal conductivity

Review on Recent Advancements in the Field of Reinforced Epoxy Nano Composits

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