The effect of polyaniline content deposited on silica gel particles on the electrorheology of silicone-oil suspensions

被引：2
|
作者：
Pavlínek, V
Sáha, P
Kitano, T
机构：
[1] Tomas Bata Univ Zlin, Fac Technol, Zlin 76272, Czech Republic
[2] Natl Inst Adv Ind Sci & Technol, Macromol Technol Res Ctr, Tsukuba, Ibaraki 3058565, Japan
[3] Acad Sci Czech Republ, Inst Macromol Chem, CR-16206 Prague, Czech Republic
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2005年 / 19卷 / 7-9期
关键词：
D O I：
10.1142/S0217979205029912
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Investigation of the electrorheological effect of silicone-oil suspensions of silica particles coated with polyaniline base in a DC electric field revealed that breaking stress, as a criterion the intensity of the electrorheological phenomenon, steeply increased at first with coating thickness. At relatively low polyaniline content (volume fraction approximate to 0.05), it has reached a value several times higher than that with suspension of pure silica Then they became virtually constant or slightly increased. The frequency spectra of dielectric characteristics of these systems reflect high relaxation times. The results suggest that the interfacial polarization of particles is predominantly controlled by polarizability of their surface layer, and the influence of the thickness is of secondary importance.
引用
收藏
页码：1097 / 1103
页数：7
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