Enhancement of the thermal conductivity of aluminum oxide-epoxy terminated poly(dimethyl siloxane) with a metal oxide containing polysiloxane
Enhancement of the thermal conductivity of aluminum oxide-epoxy terminated poly(dimethyl siloxane) with a metal oxide containing polysiloxane
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DOI：
10.1007/s10853-011-5604-7
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发表时间：
2011-10-01
影响因子：
4.5
通讯作者：
Kim, Jooheon
中科院分区：
文献类型：
--
作者：
Im, Hyungu;Kim, Jooheon
合成了含聚二甲基-甲基乙烯基硅氧烷的氧化铝（PMDMS:Al2O3），并与端环氧基二甲基硅氧烷（ETDS）共混制备了导热复合材料。添加PMDMS:Al2O3是为了在Al2O3和聚合物基体之间提供界面相互作用。在一定的填料浓度下，PMDMS:Al2O3复合材料表现出更强的热传导性能，这是因为界面结合得到了加强。电导率作为填料浓度的函数与Agari的模型相关。根据Agari模型得出的系数，PMDMS:Al2O3影响了复合材料中导电路径的形成。结果表明，与不含PMDMS:Al2O3的化合物相比，PMDMS:Al2O3的存在有助于建立导电路径。所有复合材料的导热系数都随工作温度的升高而降低。正如预期的那样，无论工作温度如何，含PMDMS:Al2O3的复合材料（P-ETDS/Al2O3）的导热性都比不含PMDMS:Al2O3的复合材料表现出更高的导热性。
Aluminum oxide containing poly(dimethyl-methylvinyl)siloxane (PMDMS:Al2O3) was synthesized and blended with epoxy-terminated dimethylsiloxane (ETDS) to fabricate a thermally conducting composite. PMDMS:Al2O3 was added to provide interfacial interactions between the Al2O3 and polymer matrix. The PMDMS:Al2O3 containing composites revealed more enhanced thermal conduction properties because of the strengthened interfacial bonding at a fixed filler concentration. The conductivity as a function of the filler concentration was correlated with Agari's models. Based on the coefficient obtained from Agari's model, PMDMS:Al2O3 affected the formation of the conducting path in the composite. The results indicated that the presence of PMDMS:Al2O3 would help to establish a conducting path compared to compounds without it. All composites showed a decrease in thermal conductivity with increasing operating temperature. As expected, the PMDMS:Al2O3 containing composite (P-ETDS/Al2O3) showed more enhanced thermal conductivity than those without, regardless of the operating temperature.