Effect of water adsorption at nanoparticle-oil interface on charge transport in high humidity transformer oil-based nanofluid

被引：38

作者：

Du, Yuefan ^{[1
,3
]}

Lv, Yuzhen ^{[2
]}

Li, Chengrong ^{[1
,3
]}

Zhong, Yuxiang ^{[1
,3
]}

Chen, Mutian ^{[1
,3
]}

Zhang, Shengnan ^{[2
]}

Zhou, You ^{[1
,3
]}

Chen, Zhengqi ^{[1
,2
,3
]}

机构：

[1] N China Elect Power Univ, Sch Elect & Elect Engn, Beijing Key Lab High Voltage & EMC, Beijing 102206, Peoples R China

[2] N China Elect Power Univ, Sch Energy Power & Mech Engn, Beijing 102206, Peoples R China

[3] N China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing 102206, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2012年 / 415卷

基金：

中国国家自然科学基金;

关键词：

Nanofluid; Nanoparticle-oil interface; Charge transport; Shallow trap; Water adsorption; Breakdown; SPACE-CHARGE; INSULATION;

D O I：

10.1016/j.colsurfa.2012.10.002

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Transformer oil-based nanofluids (NFs) with TiO2 semiconductive nanoparticles (SNFs) exhibit substantially higher AC breakdown voltage than that of pure transformer oils at variable relative humidity from 20% to 80%. Charge accumulation and decay characteristics of pure oils and SNFs were measured by the pulse electroacoustic technique (PEA). It reveals that SNFs have more uniform internal electric fields and higher charge decay rate compared to pure oils under high relative humidity. It is confirmed by the test results of electrophoresis and thermally stimulated current (TSC) that the nanoparticles adsorb water molecules at the nanoparticle-oil interface, giving rise to the higher shallow trap density and resulting in better charge transport in SNFs. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：153 / 158

页数：6

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