Preparation of graphene modified epoxy resin with high thermal conductivity by optimizing the morphology of filler

Sun, Yunfei; Tang, Bo; Huang, Weiqiu; Wang, Shuli; Wang, Zhengwei; Wang, Xiaobin; Zhu, Yuejin; Tao, Chongben

doi:10.1016/j.applthermaleng.2016.05.005

Cited by 58 publications

(40 citation statements)

References 35 publications

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“…3 The potential application of resin materials as heat dissipaters has recently attracted considerable attention due to their good thermal stability and excellent mechanical properties. 4 However, their further application is limited by their low thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Surface modification and thermal performance of a graphene oxide/novolac epoxy composite

Fang

et al. 2018

RSC Adv.

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Functionalized graphene oxide (GO) was successfully modified by grafting 1,3,5-triglycidylisocyanurate (TGIC) onto the surface of GO. The modified GO was then added to a novolac epoxy composite at various volume fractions to improve the interfacial compatibility between the filler and matrix. Samples of the modified GO/novolac epoxy composite were fabricated through the hot-pressing method.Microstructural analysis revealed that the modified GO dispersed well in the matrix and formed thermal conductive pathways across the matrix. The thermal degradation temperature of 50% weight loss of the modified GO/novolac epoxy composite was 166 C higher than that of the novolac epoxy. The data for loss factor tan d demonstrated that when the composite contained 36.8 wt% of modified GO, the glass transition temperature of the modified GO/novolac epoxy composite was 222 C, which is 90 C higher than that of the novolac epoxy. The thermal conductivity of the modified GO/novolac epoxy composite. Results indicated that the incorporation of surface-modified GO into the novolac epoxy positively affects the thermal conductivity and various properties of the modified GO/novolac epoxy composite.

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Section: Introductionmentioning

confidence: 99%

Surface modification and thermal performance of a graphene oxide/novolac epoxy composite

Fang

et al. 2018

RSC Adv.

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“…Although both the RGO nanosheets and 3DGNs are constituted with graphene basal sheets, the distinctions from the morphology of these two fillers and chemical state of carbon atoms endow the different functions of them in the TIMs. On the one hand, the high quality and the continuous structure of the 3DGNs make it an excellent fast transport network for phonons, which has been proven in our previous reports [8]. On the other hand, due to the high defect density and the lack of a continuous structure, the phonon transport ability of the RGO filler is weaker than the 3DGNs [7].…”

Section: Resultsmentioning

confidence: 79%

“…The amount of boundaries is determined by the average size of the adopted RGO nanosheets, while the amount of the functional group is dependent on the reduction procedure. More details on the reduction degree of the RGO nanosheets by XPS spectra are discussed in our previous reports and the Supplementary materials [7, 8]. The enlarged FTIR is a useful tool to observe the chemical bond between various materials according to the intensities and positions of the corresponding signals.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, overmuch interfaces of the RGO nanosheets lead to a high total thermal boundary resistance (Kapitza scattering), which results in a strong phonon scattering [7]. At last, the high defect density of the RGO nanosheets due to the violent oxidation-reduction processes also brings about an extra thermal resistance source (shortening the mean free path of phonon, Umklapp scattering) [8]. …”

Section: Introductionmentioning

confidence: 99%

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RGO and Three-Dimensional Graphene Networks Co-modified TIMs with High Performances

Wang

Huang

et al. 2017

Nanoscale Res Lett

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With the development of microelectronic devices, the insufficient heat dissipation ability becomes one of the major bottlenecks for further miniaturization. Although graphene-assisted epoxy resin (ER) display promising potential to enhance the thermal performances, some limitations of the reduced graphene oxide (RGO) nanosheets and three-dimensional graphene networks (3DGNs) hinder the further improvement of the resulting thermal interface materials (TIMs). In this study, both the RGO nanosheets and 3DGNs are adopted as co-modifiers to improve the thermal conductivity of the ER. The 3DGNs provide a fast transport network for phonon, while the presence of RGO nanosheets enhances the heat transport at the interface between the graphene basal plane and the ER. The synergy of these two modifiers is achieved by selecting a proper proportion and an optimized reduction degree of the RGO nanosheets. Moreover, both the high stability of the thermal conductivity and well mechanical properties of the resulting TIM indicate the potential application prospect in the practical field.Electronic supplementary materialThe online version of this article (10.1186/s11671-017-2298-z) contains supplementary material, which is available to authorized users.

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“…Several additives have been used as fillers, including carbon nanofibers, short carbon fibers, graphite and graphene nanosheets [13][14][15][16][17][18][19][20][21][22]. In particular, graphite has beneficial properties that include high lubricating ability, heat resistance, corrosion resistance and thermal/electrical conductivity.…”

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confidence: 99%

The effects of carbon coating onto graphite filler on the structure and properties of carbon foams

Kim¹,

Kim²,

Lee³

2017

Carbon letters

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Carbon foams (CFms) are of crucial importance in electrical and mechanical devices due to their high thermal conductivity used for eliminating high heat flow and maintaining low temperatures [1]. The most common CFms are types of aluminum alloys, copper and diamond. However, the mechanical properties of metal-based heat sink materials are difficult to control at temperatures over 550°C [2,3]. Thus, CFms are actively investigated as heat sink materials because of their good properties, such as high thermal stability, high thermal/electrical conductivity, low density, high porosity and high specific surface area [4,5]. CFms are suitable materials for applications in phase-change materials, such as in latent heat thermal energy storage and lithium-ion batteries [6][7][8][9].CFms are prepared from thermoplastic graphitizable precursors, such as petroleum-derived, coal-derived and mesophase pitch (MP). In particular, MP has been widely used as an appropriate precursor for high-performance carbon materials due to its attractive properties, i.e., high coke yield, low softening point, and high fluidity [10]. Previous processes used a blowing technique, or pressure release, to produce foam from MP. These manufacturing techniques have many disadvantages: the volume fraction of generated cells cannot be precisely controlled, and controlling the shape and distribution of cells is difficult, if not impossible [11]. To better control and tailor the structure of such foams, polymer template methods are actively being researched. Hydrogel template methods are suitable for preparing high-strength CFms due to their large quantities of carbon precursors and the pressure generated through hydrogel shrinkage via heat treatment [10,12]. However, their mechanical strengths are low because of their high porosities.One method for improving the mechanical strength of CFms is adding fillers with a high mechanical strength. Several additives have been used as fillers, including carbon nanofibers, short carbon fibers, graphite and graphene nanosheets [13][14][15][16][17][18][19][20][21][22]. In particular, graphite has beneficial properties that include high lubricating ability, heat resistance, corrosion resistance and thermal/electrical conductivity. It has been widely applied in various fields as a highly functional component with efficient properties. Additionally, the theoretical thermal conductivity of graphite is high, with values ranging from 3000 to 5000 W/mK, and its mechanical strength is 1100 GPa [23,24]. The thermal/mechanical properties of CFms could be improved by the addition of carbon nanofillers with good thermal/mechanical properties through the formation of network structures comprising CFms and carbon nanofillers. Furthermore, carbon nanofillers can be carbon-coated (C-coated) to improve the interfacial bonding with metal. For example, Katzman [25] showed that carbon fibers could be C-coated using amorphous pitch to improve the interfacial bonding with metal oxide and prepare a carbon-fiber-reinforced metal-matrix compo...

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Preparation of graphene modified epoxy resin with high thermal conductivity by optimizing the morphology of filler

Cited by 58 publications

References 35 publications

Surface modification and thermal performance of a graphene oxide/novolac epoxy composite

Surface modification and thermal performance of a graphene oxide/novolac epoxy composite

RGO and Three-Dimensional Graphene Networks Co-modified TIMs with High Performances

The effects of carbon coating onto graphite filler on the structure and properties of carbon foams

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