title: Synthesis and electrical response of polyaniline/poly(styrene sulfonate)-coated silica spheres prepared by seed-coating method.
abstract: The polyaniline/poly(styrene sulfonate) (PANI/PSS)-coated silica spheres with three different sizes (50, 100, and 250 nm) are fabricated through seed-coating method and adopted as dispersing materials for electrorheological (ER) fluids to examine the influence of particle diameter on ER activity. Interestingly, the ER properties of PANI/PSS-coated silica spheres exhibit a dependence on their size. Performances of PANI/PSS-coated silica spheres-based ER fluids enhanced with decreasing the diameter of particle. It is believed that the size effect played a dominant role in enhancing the performance of ER fluid. Furthermore, the fibrillation phenomenon of prepared PANI/PSS-coated silica spheres-based ER fluid was observed via an optical microscope in the applied electric field. Sedimentation properties were also analyzed to provide additional insight into the size effect of ER fluids.
authors.affiliation: School of Chemical and Biological Engineering, Seoul National University, Gwanak-gu, Seoul, Republic of Korea.
authors.forename: Seungae
authors.initials: S
authors.lastname: Lee
authors.forename: Jin-Yong
authors.initials: JY
authors.lastname: Hong
authors.forename: Jyongsik
authors.initials: J
authors.lastname: Jang