Electrorheological properties of polyphenylene suspensions

Janusz Płocharski , Hubert Drabik , Henryk Wyciślik , Tomasz Ciach

Abstract

Electrorheological (ER) fluids are currently being extensively investigated since their technical applications look very promising. The effect relies on rapid and reversible changes of viscosity of an ER fluid upon application of electric field. Doping of a conjugated polymer increases its electrical conductivity σ and dielectric constant ε. Since factors determining values of these two parameters are different, it is sometimes possible to prepare a material of high ε and low σ, which is the basic requirement for a main component of an ER fluid. Thus, conjugated polymers can be used in formulation of these fluids. Poly(p-phenylene) (PPP) treated with ferrous chloride was chosen and its bulk electrical properties were investigated by means of impedance spectroscopy. The values of ε were 40–130 and the values of σ were 10−8-10−6 S/cm. ER fluids were prepared from the polymer powder and silicone oil, and their ER properties were studied. The fluids exhibited Bingham-like behaviour. The magnitude of the ER effect increases with ε but saturation at dielectric constants exceeding 100 is observed. This saturation seems to be a general feature of any ER fluid. Correlations between material parameters of the doped bulk PPP and the ER effect are shown.
Author Janusz Płocharski (FC / CICSST)
Janusz Płocharski,,
- Chair Of Inorganic Chemistry And Solid State Technology
, Hubert Drabik
Hubert Drabik,,
-
, Henryk Wyciślik (FC)
Henryk Wyciślik,,
- Faculty of Chemistry
, Tomasz Ciach (FCPE / DBBE)
Tomasz Ciach,,
- Department of Biotechnology and Bioprocess Engineering
Journal seriesSynthetic Metals, ISSN 0379-6779
Issue year1997
Vol88
No2
Pages139-145
Publication size in sheets0.5
Keywords in Englishelectrorheological behaviour, polyphenylene
ASJC Classification2505 Materials Chemistry; 2506 Metals and Alloys; 2210 Mechanical Engineering; 2211 Mechanics of Materials; 3104 Condensed Matter Physics; 2504 Electronic, Optical and Magnetic Materials
DOIDOI:10.1016/S0379-6779(97)03848-4
URL http://ac.els-cdn.com/S0379677997038484/1-s2.0-S0379677997038484-main.pdf?_tid=7f7e0934-dbe2-11e6-b9cd-00000aacb35d&acdnat=1484567833_2e9e4aa986606cd13f700c0e22a0c5a1
Languageen angielski
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Płocharski J. (i in.) - Electrorheological properties of....pdf 686.46 KB
Score (nominal)30
Score sourcejournalList
Publication indicators WoS Citations = 29; GS Citations = 40.0; Scopus SNIP (Source Normalised Impact per Paper): 2014 = 0.943; WoS Impact Factor: 2006 = 1.685 (2) - 2007=1.681 (5)
Citation count*40 (2020-05-09)
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