Tuning of thermal and dielectric properties for epoxy composites filled with electrospun alumina fibers and graphene nanoplatelets through hybridization
Tuning of thermal and dielectric properties for epoxy composites filled with electrospun alumina fibers and graphene nanoplatelets through hybridization
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通过杂化调整填充电纺氧化铝纤维和石墨烯纳米片的环氧复合材料的热性能和介电性能
DOI：
10.1039/c5tc01552a
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发表时间：
2015-07
影响因子：
6.4
通讯作者：
Zhi-Min Dang
中科院分区：
文献类型：
--
作者：
Jun-Wei Zha;Tian-Xing Zhu;Yun-Hui Wu;Si-Jiao Wang;Robert K. Y. Li;Zhi-Min Dang
环氧树脂具有良好的粘接性、低固化收缩和良好的电绝缘性能，被广泛应用于各种形式的电子电气封装。然而，低导热系数和不匹配的介电性能限制了它在高集成度电路中的应用。本工作首先以溶胶-凝胶为前驱体，通过静电纺丝法制备了氧化铝纤维。采用热压法制备了石墨烯纳米片(GNPs)/AFS/EP复合材料。研究了EP混杂复合材料的微观结构、导热性能和介电性能。扫描电子显微镜显示，改性后的AFS和GNPs均匀分散在环氧树脂中，形成了导热网状结构。AFS不仅可以将GNPs与环氧树脂连接起来，还可以降低界面热阻，使EP-GNP-AF复合材料的导热系数达到1.62W m−1 K−1，约为纯EP的8倍。当GNP质量分数为2%、AF质量分数为50%时，复合材料的分解温度提高了约100度。EP复合材料的介电性能对频率有很强的依赖性，对温度有很弱的依赖性，这就产生了在不同的电场/电场应用中的电势。
Epoxy resin is widely used for electrical and electronics packaging in various forms due to its excellent adhesion, low cure shrinkage and good electrical insulation. However, the low thermal conductivity and mismatched dielectric properties limit its application in highly integrated circuits. In this work, alumina fibers (AFs) were firstly prepared via electrospinning with sol–gel precursor. Epoxy (EP) composites with graphene nanoplatelets (GNPs) and AFs were fabricated using a hot-pressing process. Microstructures, thermal conductivity and dielectric properties of EP hybrid composites were studied. Scanning electron microscopy images reveal that the modified AFs and GNPs were uniformly dispersed in the epoxy matrix and the thermal conductive reticular structures were formed. The AFs can not only link the GNPs and epoxy but also reduce the interfacial thermal resistance so that a high thermal conductivity of 1.62 W m−1 K−1 is realized in the EP–GNP–AF composite, which is about 8 times higher than pure EP. The decomposition temperature of the epoxy composites with 2 vol% GNP and 50 vol% AF loading was enhanced by about 100 degrees. Dielectric properties of EP composites have a strong dependence on frequency and a weak dependence on temperature, which gives rise to the potential in different electronic/electrical field applications.
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影响因子：
--
作者：
Tan CM;Baudot C;Han Y;Jing H
通讯作者：
Jing H
影响因子：
6
作者：
Yanfei Zhang;Jiayan Li;Qin Li;Ling Zhu;Xiangdong Liu;X. Zhong;J. Meng;Xueqiang Cao
通讯作者：
Yanfei Zhang;Jiayan Li;Qin Li;Ling Zhu;Xiangdong Liu;X. Zhong;J. Meng;Xueqiang Cao
影响因子：
4.6
作者：
Chung, Pao Tang;Yang, Chun Ting;Liu, Cheng-Yi
通讯作者：
Liu, Cheng-Yi
影响因子：
29.4
作者：
Song, Sung Ho;Park, Kwang Hyun;Jeon, Seokwoo
通讯作者：
Jeon, Seokwoo
影响因子：
4.5
作者：
Im, Hyungu;Kim, Jooheon
通讯作者：
Kim, Jooheon