Large‐scale synthesis of hexagonal boron nitride nanosheets and their improvement in thermal properties of epoxy composites

Jin, Xing; Fan, Ying; Tian, Ruijun; Xu, Xuewen; Li, Jie; Lin, Jianming; Zhang, Jun; Hu, Long; Tang, Chengchun

doi:10.1002/pc.22824

Cited by 35 publications

(21 citation statements)

References 35 publications

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“…Most straightforwardly, increasing the filler content in the composite can improve the thermal conductivity; for example, a thermal conductivity of 32.5 W/mK was reported when BN reached a loading fraction of 78.5 vol% in polybenzoxazine matrix . Surface modification of BN assists with homogenous dispersion of filler in resin matrix . Mixing multiple sized particles leads to high packing density and easy formation of conductive pathways .…”

Section: Introductionmentioning

confidence: 99%

Densely packed polymer/boron nitride composite for superior anisotropic thermal conductivity

Zhu

Wang

et al. 2017

Polymer Composites

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High heat conduction performance of electrical insulating composite is highly desired in thermal management of electronics. In this study, densely packed boron nitride (BN) composites with resin matrices of epoxy, polymethyl methacrylate, and an acrylic copolymer based binder were prepared through a solvent mediated mixing and compression molding method. The solvent mediated mixing assisted homogeneous dispersion; the compression molding removed excessive resin and led to alignment of BN flakes with high filler content. The resulted composites exhibited superior in‐plane thermal conductivity k// up to 21.3 W/mK and pronounced anisotropic heat conduction properties. The thermal conductivity was positively correlated with density bold-italicρ of a specimen in experimental. A presentation of thermal conductivity bold-italick=bold-italick|bold-italicρ was proposed, and the dependence of thermal conductivity on specimen density bolddbold-italicktrue(bold-italicρtrue)/bolddbold-italicρ > 0 was proven mathematically. The application of BN composite in LED thermal management was demonstrated. An epoxy/BN heat spreader was used to efficiently cool down a 0.3‐W LED. The cooling effect was close to that with Al board heat spreader. POLYM. COMPOS., 39:E1653–E1658, 2018. © 2017 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Densely packed polymer/boron nitride composite for superior anisotropic thermal conductivity

Zhu

Wang

et al. 2017

Polymer Composites

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“…ERs are utilized as an adhesive, coating, construction material, laminate and matrix to obtain composite material . However, ERs have some shortcomings such as brittleness, low toughness and thermal conductivity, and so on . Different fillers play an important role to overcome aforementioned deficiencies in the polymer composites.…”

Section: Introductionmentioning

confidence: 99%

Properties of polymer composites based on bisphenolAepoxy resins with original/modified steel slag

Guzel

Deveci

2016

Polymer Composites

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Recently, many inorganic solid wastes have accumulated as a byproduct in several industries and their storage is one of the major problems. Among these wastes, steel slag has attracted attention to utilize with different purposes. In this study, original steel slag (OS) and modified steel slag (MS) were evaluated as a filler to prepare low-cost epoxy composites. The effect of components on the properties of steel slag/ epoxy composites (SECs) was investigated with various analyses and tests. Physicomechanical and thermal properties of the SECs were compared with each other and neat epoxy resin (ER). Good dispersion of OS and MS in the ER matrix was determined with Xray diffraction (XRD) pattern and scanning electron microscopy (SEM). Tensile strength, Young modulus, and hardness values of the SECs were enhanced after modification of OS. Any change on adhesion and corrosion resistance of the SECs was not observed; however water sorption percent was increased with the addition of components. As per thermogravimetric analyses (TGA) and vicat softening temperature (VST) analyses, SECs cured with anhydride showed higher decomposition temperature than the other hardener.

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“…By adding 25 wt% of BNNS into epoxy, the thermal conductivity of the composite has an enhancement of 180% compared to the pure epoxy resin, while the temperature corresponding to 10% of the thermal weight loss increases by nearly 20 °C. Surface modification of BNNS and the hybrid nano-fillers have become one of the research hotspots [30,31]. Yao et al [32] prepared a high thermal conductivity polyvinyl alcohol-paper by using polyvinyl alcohol as a matrix and BNNS/AgNP/SiC hybrid as a ternary mixed filler.…”

Section: Introductionmentioning

confidence: 99%

Thermal and mechanical properties study of boron nitride nanosheets decorated by silver/epoxy nanocomposites

Zhang

2020

SN Appl. Sci.

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Epoxy is widely used in mechanical and electronic industries due to its excellent adhesive properties and mechanical performances. However, the poor thermal conductivity limits its application, especially in high density equipment. In order to improve the thermal conductivity of epoxy, silver nanoparticles decorated boron nitride nano-sheets (Ag-BN) were prepared and incorporated into the epoxy matrix to obtain nanocomposites (EP-AB) in this work. The EP-AB behaves a significant enhancement of 1089% at an Ag-BN loading of 25 vol% compared to the pure epoxy. The thermogravimetric curve shows that the thermal stability of nanocomposites is improved with the addition of Ag-BN. Moreover, dynamic thermomechanical analysis reveals that Ag-BN can effectively reduce the segmental mobility of the epoxy matrix, which helps to improve the stiffness, decrease the mechanical loss, and increase the glass transition temperature of EP-AB. Those three properties gain an optimum value when the content of Ag-BN is 20 vol%. Also, the nanocomposites perform more stability in mechanical properties than pure epoxy under a varied frequency. The Cole-Cole plot of storage modulus and loss modulus shows that the pure epoxy and nanocomposites with low nanomaterial content are homogenous and the uniformity begins to decrease when the addition of Ag-BN is 20 vol%.

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Large‐scale synthesis of hexagonal boron nitride nanosheets and their improvement in thermal properties of epoxy composites

Cited by 35 publications

References 35 publications

Densely packed polymer/boron nitride composite for superior anisotropic thermal conductivity

Densely packed polymer/boron nitride composite for superior anisotropic thermal conductivity

Properties of polymer composites based on bisphenolAepoxy resins with original/modified steel slag

Thermal and mechanical properties study of boron nitride nanosheets decorated by silver/epoxy nanocomposites

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