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首页> 外文期刊>Polymers for advanced technologies >Synergistic effect of hybrid graphene and boron nitride on the cure kinetics and thermal conductivity of epoxy adhesives
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Synergistic effect of hybrid graphene and boron nitride on the cure kinetics and thermal conductivity of epoxy adhesives

机译：杂交石墨烯与氮化硼对环氧粘合剂的固化动力学和导热率的协同作用

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In the present study, the synergistic effect of hybrid boron nitride (BN) with graphene on the thermal conductivity of epoxy adhesives has been reported. Graphene was prepared by chemical reduction of graphite oxide (GO) in a mixture of concentrated H2SO4/H3PO4 acid. The particle size distribution of GO was found to be similar to 10m and a low contact angle of 54 degrees with water indicated a hydrophilic surface. The structure of prepared graphene was characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), Raman spectroscopy and atomic force microscopy (AFM). The thermal conductivity of adhesives was measured using guarded hot plate technique. Test results indicated an improvement in the thermal conductivity up to 1.65W/mK, which was about ninefold increase over pristine epoxy. Mechanical properties of different epoxy formulations were also measured employing lap shear test. The surface characterization of different epoxy adhesive systems was characterized through XRD, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies. Fourier transform infrared also served to determine the nature of interactions between filler particles and epoxy resin. Non-isothermal differential scanning calorimetric (DSC) technique was used to investigate the effects of graphene and BN particles on the cure kinetics and cross-linking reaction of epoxy cured with amine curing agent. The Kissinger equation, the model-free isoconversional Flynn-Wall-Ozawa method and the Ozawa model were used to analyze the kinetic parameter. Copyright (c) 2017 John Wiley & Sons, Ltd.
机译：在本研究中，已经报道了杂交氮化硼（BN）与石墨烯对环氧粘合剂导热率的协同作用。石墨烯通过在浓H 2 SO 4 / H 3×4酸的混合物中的石墨氧化物（GO）的化学还原制备。发现去的粒度分布类似于10米，水的低接触角与水显示出亲水表面。制备石墨烯的结构的特征在于傅里叶变换红外（FTIR），X射线衍射（XRD），拉曼光谱和原子力显微镜（AFM）。使用防护的热板技术测量粘合剂的导热率。测试结果表明，高达1.65W / MK的导热率提高，这约为原始环氧树脂的九倍。还测量了不同环氧制剂的机械性能，采用膝盖剪切试验。不同环氧粘合剂系统的表面表征通过XRD，扫描电子显微镜（SEM）和透射电子显微镜（TEM）研究表征。傅里叶变换红外线还用于确定填料颗粒和环氧树脂之间的相互作用的性质。使用非等温差分扫描量热（DSC）技术研究石墨烯和BN颗粒对固化动力学对固化动力学的影响以及用胺固化剂固化的环氧树脂交联反应。基辛格方程式，无模型的异组梭 - 瓦上壁织物和欧扎瓦模型用于分析动力学参数。版权所有（c）2017 John Wiley＆Sons，Ltd。

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