High thermal conductivity composites obtained by novel surface treatment of boron nitride

Wie, Jaehyun; Kim, Kwanwoo; Kim, Jooheon

doi:10.1016/j.ceramint.2020.04.063

Cited by 22 publications

(8 citation statements)

References 35 publications

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“…The Maxwell–Garnett model, the Hasselman–Johnson model, every model, the Agari model, and other equations can be used to calculate and estimate the thermal conductivity (λ) of composite materials. The Agari model has been shown to be suitable for systems with high filler loading and a formable thermal route and can be expressed by the following equation , where C 1 represents the effects of the fillers on polymer crystallinity or crystal size, and C 2 represents the ability of the filler particles to form a thermally conductive network in the composite system, where the larger the value, the stronger the ability of the filler to form a thermally conductive network in the composite system. The weight fractions of the BN filler, thermal conductive fillers (primarily, BN, 300 W/m K), and pure EP (0.22 W/m K) were represented by λ C, λ F , and λ P in the EP-based composites, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The Maxwell−Garnett model, the Hasselman−Johnson model, every model, the Agari model, and other equations can be used to calculate and estimate the thermal conductivity (λ) of composite materials. The Agari model has been shown to be suitable for systems with high filler loading and a formable thermal route and can be expressed by the following equation 29,30 VC 1 V C log log ( ) log( )…”

Section: Preparation Andmentioning

confidence: 99%

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Facile Strategy for Constructing Highly Thermally Conductive Epoxy Composites Based on a Salt Template-Assisted 3D Carbonization Nanohybrid Network

Jiang

Sun

ShangGuan

et al. 2022

ACS Appl. Mater. Interfaces

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The construction of an interconnected nanofiller network is critical for the preparation of highly effective thermal management composites, though it remains a challenge to eliminate the anisotropic thermal conductivity of the nanofiller-induced defective interfacial heat-flow efficiency. In this work, a facile and novel approach is proposed to optimize phonon transport by building a salt template-assisted three-dimensional (3D) carbonization nanohybrid network in an epoxy system. The advantage of the salt template relied on green and scalable merits to construct a 3D nanofiller network and supporting abundant holes for the introduction of a polymer matrix after washing. Meanwhile, the contained carbonization materials contributed to reducing the interfacial phonon scattering issues of the filler/filler and filler/ polymer for an efficient heat-flow pathway. As a result of this effect, the prepared epoxy nano-composites presented a high thermal conductivity of 4.27 W/m K, resulting in a 1841% increase compared to the thermal conductivity of the pure epoxy resin. In addition, the epoxy composites exhibited good mechanical properties and thermal conductive performance during heating and cooling. Therefore, this study may provide new insights into the design and preparation of thermal management polymers to meet the applicational requirements of electronics.

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Section: Resultsmentioning

confidence: 99%

Section: Preparation Andmentioning

confidence: 99%

Facile Strategy for Constructing Highly Thermally Conductive Epoxy Composites Based on a Salt Template-Assisted 3D Carbonization Nanohybrid Network

Jiang

Sun

ShangGuan

et al. 2022

ACS Appl. Mater. Interfaces

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“…It is known that borax contributes to the creation of a cross-linked bonding network between the PVA molecular chains and enhancement of the viscoelasticity of PVA 27 , 28 . In addition, because hydrogels formed by the PVA-borax complexation have high inherent water solubility, it seems that the dispersibility of filler nanoparticles in the solution mixture was maintained despite the increase in its viscoelastic characteristics 22 .…”

Section: Resultsmentioning

confidence: 99%

Crosslinking effect of borax additive on the thermal properties of polymer-based 1D and 2D nanocomposites used as thermal interface materials

Chen

Yadav

Jung

et al. 2022

Sci Rep

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Recently, polymer-based materials have been used in various filed of applications, but their low thermal conductivity restricts their uses due to the high interfacial thermal resistance. Therefore, in this study, one-dimensional thin-walled carbon nanotube (1D-TWCNT) and two-dimensional boron nitride nanosheet (2D-BNNS) fillers were used to enhance the thermal properties of polyvinyl alcohol (PVA). An important factor to be considered in enhancing the thermal properties of PVA is the interfacial configuration strategy, which provides sufficient pathways for phonon transport and the controlled loss of the intrinsic thermal properties of the filler nanomaterial. In this study, the effect of sodium tetraborate (borax) additive on the thermal properties of 1D-TWCNT/PVA and 2D-BNNS/PVA nanocomposites was explored. Borax is a well-known crosslinking additive that can be used with PVA. The crosslink density of the PVA-borax nanocomposite was controlled by changing its borate ion concentration. The addition of borax into nanocomposites improves the conductivity of 1D-TWCNT/PVA nanocomposites up to 14.5% (4 wt.% borax) and of 2D-BNNS/PVA nanocomposite up to 30.6% for BNNS (2 wt.% borax). Thus, when borax was added, the 2D-BNNS/PVA nanocomposite showed better results than the 1D-TWCNT/PVA nanocomposite.

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“…In addition, four fitting peaks were observed in the Si 2p deconvolution of VTES-BN. Peaks at 101.0 eV, 102.5 eV, 103.3 eV, and 104.4 eV corresponded to Si–C, Si–OH, Si–O–B, and Si–O–Si, respectively [ 26 ]. The presence of Si-O-B confirmed bonding between the BN and VTES.…”

Section: Resultsmentioning

confidence: 99%

Thermal Properties of Surface-Modified and Cross-Linked Boron Nitride/Polyethylene Glycol Composite as Phase Change Material

Wie

Kim

2021

Polymers

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A thermally conductive phase change material (PCM) was fabricated using polyethylene glycol (PEG) and boron nitride (BN). However, the interfacial adhesion between the BN and the PEG was poor, hindering efficient heat conduction. Grafting polyvinyl alcohol (PVA) onto the surface of BN and cross-linking due to hydrogen bonding between the hydroxyl groups in PVA and oxygen atoms in PEG improved the wettability of fillers. By employing this strategy, we achieved a thermal conductivity value of 0.89 W/mK, a 286% improvement compared to the thermal conductivity of the pristine PEG (0.23 W/mK). Although the latent heat of composites decreased due to the mobility of the polymer chain, the value was still reasonable for PCM applications.

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High thermal conductivity composites obtained by novel surface treatment of boron nitride

Cited by 22 publications

References 35 publications

Facile Strategy for Constructing Highly Thermally Conductive Epoxy Composites Based on a Salt Template-Assisted 3D Carbonization Nanohybrid Network

Facile Strategy for Constructing Highly Thermally Conductive Epoxy Composites Based on a Salt Template-Assisted 3D Carbonization Nanohybrid Network

Crosslinking effect of borax additive on the thermal properties of polymer-based 1D and 2D nanocomposites used as thermal interface materials

Thermal Properties of Surface-Modified and Cross-Linked Boron Nitride/Polyethylene Glycol Composite as Phase Change Material

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