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Effect of surfactant on the dielectric and electrorheological properties of zinc borate/silicone oil dispersions
International Journal of Minerals, Metallurgy and Materials ( IF 5.6 ) Pub Date : 2019-12-07 , DOI: 10.1007/s12613-019-1853-2
Omer Yunus Gumus , Halil Ibrahim Unal

Zinc borate (ZB) particles dispersed in silicone oil (SO) at concentrations of ϕ = 5vol%-20vol% were subjected to dielectric analysis to elucidate their polarization strength, time, and mechanism. Results revealed that all virgin dispersions lacked polarization. Triton X-100, a non-ionic surfactant, was added to ZB/SO dispersions to enhance the polarizability of ZB particles. The addition of 1vol% Triton X-100 enhanced the polarizability of ZB/SO dispersions, and the 15vol%ZB/SO system provided the highest dielectric difference Δε′ (the difference in ε′ values at zero and infinite frequency, Δε′ = ε0 - ε221D) of 3.64. The electrorheological (ER) activities of the ZB/SO/Triton-X dispersion system were determined through the ER response test, and viscoelastic behaviors were investigated via oscillation tests. A recoverable deformation of 36% under an applied electrical field strength of 1.5 kV/mm was detected through creep and creep recovery tests.



中文翻译:

表面活性剂对硼酸锌/硅油分散体介电和电流变特性的影响

对分散在硅油(SO)中浓度为ϕ = 5vol%-20vol%的硼酸锌(ZB)颗粒进行介电分析,以阐明其极化强度,时间和机理。结果表明,所有原始分散体均未极化。将非离子型表面活性剂Triton X-100添加到ZB / SO分散体中,以增强ZB颗粒的极化性。添加1vol%的Triton X-100可增强ZB / SO分散体的极化率,而15vol%ZB / SO系统可提供最高的介电差Δε'(零和无限频率下的ε'值之差Δε') = ε 0 - ε 221D)的3.64。通过ER反应测试确定ZB / SO / Triton-X分散体系的电流变(ER)活性,并通过振荡测试研究粘弹性行为。通过蠕变和蠕变恢复测试,在施加的1.5 kV / mm电场强度下,可恢复变形为36%。

更新日期:2019-12-07
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