2005 Volume 33 Issue 5 Pages 239-247
Composite particles consisting of polymer core and inorganic shell are formed by suspension polymerization. The ER behavior of suspensions is studied in relation to column structures in electric fields. It is demonstrated that the surface modification of particles is very useful to improve the ER performance of suspensions. The highly anisotropic structures are induced in electric fields and hence the ER suspensions show striking electrooptical effects. On the application of high electric fields to some insulating oils, a fluid jet with a velocity of about 1 ms−1 is generated from the electrode. New fluid devices such as liquid motors, inkjet nozzles, and ER elements are developed by active control of jetflow. Their performance will be discussed in relation to the rheological properties of electrosensitive liquids for future device technology.