Improved electrical insulating properties of LDPE based nanocomposite: Effect of surface modification of magnesia nanoparticles

被引：51

作者：

Ju, Siting ^{[1
,3
]}

Zhang, Hui ^{[1
]}

Chen, Mingji ^{[1
]}

Zhang, Chong ^{[2
]}

Chen, Xin ^{[2
]}

Zhang, Zhong ^{[1
]}

机构：

[1] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China

[2] State Grid Smart Grid Res Inst, Beijing 102211, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2014年 / 66卷

基金：

国家高技术研究发展计划(863计划);

关键词：

Polymer-matrix composites (PMCs); Nano-structures; Electrical properties; BREAKDOWN STRENGTH; DENSITY; TEMPERATURE; DIELECTRICS; DEPENDENCE; MORPHOLOGY; BEHAVIOR; OXIDE;

D O I：

10.1016/j.compositesa.2014.07.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Three silane coupling agents with amino, long alkyl chain or vinyl functional groups were used to modify magnesia (MgO) nanoparticles. The modified nanoparticles were then mechanically mixed with low-density polyethylene (LDPE) to fabricate insulating nanocomposites. The average size of the modified MgO aggregates dispersed in LDPE matrix was below 100 nm. The pulsed electroacoustic method indicated that the MgO nanoparticles regardless of surface modification were effective to suppress the packet-like charge injection and accumulation in the LDPE sample, decrease the permittivity and tan delta, and also improved the direct-current breakdown strength of LDPE at different temperatures. The best insulating properties were found in the case of vinyl-silane-modified-MgO/LDPE samples probably owing to the improved interfacial adhesion. A multi-core model was used to discuss the results obtained. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：183 / 192

页数：10

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