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Preparation and Characterization of Phosphate Cellulose‐Based Electrorheological Fluids
Author(s) -
Kim Seong G.,
Choi Hyoung J.,
Jhon Myung S.
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010201)202:4<521::aid-macp521>3.0.co;2-q
Subject(s) - phosphoric acid , electrorheological fluid , cellulose , phosphate , rheology , anhydrous , chemical engineering , polymer chemistry , materials science , chemistry , silicone oil , organic chemistry , composite material , electric field , physics , quantum mechanics , engineering
Phosphate cellulose particles were synthesized via the phosphoric ester reaction of cellulose particles, phosphoric acid and urea, with various molar concentrations of the phosphoric acid, and then dispersed in silicone oil to produce anhydrous dry base electrorheological (ER) fluids. The effect of the phosphoric ester reaction on ER properties was examined under various applied electric field strengths. An ER system with phosphate cellulose particles formed in a 2.0 M phosphoric acid solution exhibited the highest yield stress (ER performance) via rheological measurements under both controlled shear rate and shear stress modes. A difference in the flow behavior of the phosphate cellulose‐based ER fluids prepared from different molar concentrations of phosphoric acid solution was also investigated via the dielectric spectra. It was found that the interfacial polarization mechanism provides an accurate description of the ER characteristics of phosphate cellulose‐based ER fluids.