Al_(2)O_(3)@SiO_(2)核壳纳米球添加对聚丙烯介电和空间电荷特性的影响  

Effects of Blending Al_(2)O_(3)@SiO_(2) Core-Shell Nanospheres on the Dielectric Properties and Space Charge Properties of Polypropylene

作　　者：韩坤莹 门汝佳 郭美卿 雷志鹏 王心雨 王轶飞 石志杰 HAN Kunying;MEN Rujia;GUO Meiqing;LEI Zhipeng;WANG Xinyu;WANG Yifei;SHI Zhijie(Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control,College of Electrical and Power Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;School of Engineering,Computing and Mathematics,University of Plymouth,Plymouth PL48AA,United Kingdom;Institute of Materials Science,University of Connecticut,Storrs 06066,USA)

机构地区：[1]太原理工大学电气与动力工程学院,煤矿电气设备与智能控制山西省重点实验室,太原030024 [2]太原理工大学机械与运载工程学院,太原030024 [3]普利茅斯大学工程、计算机与数学学院,普利茅斯PL48AA [4]康涅狄格大学材料系,斯托尔斯06066

出　　处：《材料导报》2024年第6期227-233,共7页Materials Reports

基　　金：国家自然科学基金(51977137);中央引导地方科技发展资金项目(YDZJSX2021A021);山西省基础研究计划(202103021224115)。

摘　　要：为研究核壳结构Al_(2)O_(3)@SiO_(2)球形纳米颗粒对聚丙烯(Polypropylene, PP)复合电介质性能的影响,本工作利用表面沉淀法合成了Al_(2)O_(3)@SiO_(2)核壳纳米球,并制备了聚丙烯基Al_(2)O_(3)@SiO_(2)核壳纳米球复合电介质,研究了添加不同含量Al_(2)O_(3)@SiO_(2)核壳纳米球的聚丙烯纳米复合电介质的理化性能、介电谱和空间电荷特性。结果表明:添加Al_(2)O_(3)@SiO_(2)核壳纳米球降低了聚丙烯复合电介质的储存模量,增强了其韧性;Al_(2)O_(3)@SiO_(2)核壳纳米球添加量对聚丙烯复合电介质介电性能和空间电荷特性影响较明显,添加含量较低时,核壳结构Al_(2)O_(3)@SiO_(2)纳米球增强了其与基体的相容性及界面区域的相互作用,受界面区及其对体内电荷密度和载流子迁移率的影响,聚丙烯复合电介质的相对介电常数和介质损耗因数均有所降低,且抑制了异极性空间电荷积聚,因此Al_(2)O_(3)@SiO_(2)/PP复合电介质的介电性能和空间电荷特性得到提高。In order to study the effect of Al_(2)O_(3)@SiO_(2) core-shell nanoparticles on the properties of polypropylene(PP)nanocomposites,spherical Al_(2)O_(3)@SiO_(2) core-shell nanoparticles were synthesized by the surface precipitation method,and the PP nanocomposites with Al_(2)O_(3)@SiO_(2) core-shell nanospheres were prepared.The physicochemical properties,dielectric spectra,and space charge properties of PP nanocomposites with different contents of Al_(2)O_(3)@SiO_(2) nanoparticles were studied.The experimental results show that Al_(2)O_(3)@SiO_(2) nanospheres reduce the sto-rage modulus of PP nanocomposites and enhance their toughness.The filler content of Al_(2)O_(3)@SiO_(2) nanospheres has an evident effect on the dielectric properties and space charge properties.When the filler content is low,the core-shell structure of Al_(2)O_(3)@SiO_(2) nanospheres enhances the compatibility between fillers and the matrix and the interaction in the interface region,which further affects the charge density and carrier mobi-lity.Consequently,the relative permittivity and dielectric loss factor of PP nanocomposites decrease.The heterocharge accumulation is also suppressed,improving PP nanocomposites’dielectric and space charge properties.

关 键 词：纳米复合电介质 聚丙烯 核壳纳米球 介电特性 空间电荷 

分 类 号：TM21[一般工业技术—材料科学与工程] TM85[电气工程—电工理论与新技术]