摘要
为了研究不同形貌氧化铝在硅橡胶基体中构成三维导热网络结构的效率,研究了制备条件对填料形貌的影响,通过改变水热反应条件制得了长度约6μm、直径0.2μm和1μm的棒状氧化铝(AF-2和AF-5)及直径在1~10μm的球形氧化铝(AF-6)。利用Hashin-Shtrikman模型表征了3种形貌氧化铝填料在硅橡胶基体中构建三维网络结构的效率,研究表明,填料AF-2、AF-5和AF-6质量分数为20%时的相互作用率(Χinter)分别为0.056,0.093和0.034。与此同时,实验结果表明,AF-5对硅橡胶的介电性能破坏最小,其复合材料具有最低的介电常数和介电损耗,更有利于复合材料在电子行业的应用。
In order to study the efficiency of alumina with different morphologies in obtaining 3-D thermally conductive networks in silicon rubber(LSR)matrix,the influence of preparation conditions on the morphologies of alumina was studied.Rod-shaped alumina(AF-2 and AF-5)with a length of about 6μm,diameters of 0.2μm and 1μm,respectively,and spherical alumina(AF-6)with a diameter of 1~10μm were obtained by changing the hydrothermal reaction conditions.The Hashin-Shtrikman model was used to characterize the efficiency of aluminum oxide fillers in the construction of 3-D network in the silicone rubber matrix.The results show that the interaction rates,Χinter,for AF-2,AF-5 and AF-6 at a loading level of 20%are 0.056,0.093 and 0.034,respectively.At the same time,the thermal properties and dielectric properties of these alumina/LSR composites were studied.The results show that AF-5 causes the least changes in the dielectric properties of silicone,and the AF-5/LSR composite displays the lowest dielectric constant and dielectric loss,which is benefit to applications of the composites in the electronic industry.
作者
邹志强
吴唯
王懿
Wolfgang Kern
Dietmar Drummer
Zhiqiang Zou;Wei Wu;Yi Wang;Wolfgang Kern;Dietmar Drummer(Sino-German Joint Research Center of Advanced Materials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;Montanuniversitaet Leoben,Chair of Chemistry of Polymeric Materials,Leoben 8700,Austria;University Erlangen Nuremberg,Institution of Polymer Technology,Erlangen 91058,Germany)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2020年第4期128-134,141,共8页
Polymer Materials Science & Engineering
关键词
氧化铝
微观形貌
硅橡胶
导热性能
alumina
microscopic morphology
silicone rubber
thermal conductivity
