Sung, BH Choi, US Jang, HG Park, YS 2024-01-21T03:39:53Z 2024-01-21T03:39:53Z 2021-09-02 2006-02 0927-7757 https://pubs.kist.re.kr/handle/201004/135792 By this time, when electrorheological (ER) fluids were applied longterm, these have been limited because of problems with particle sedimentation. To solve the sedimentation problem, we report on the preparation of hollow polyaniline (PANI) sphere with nano-scale as the disperse phase for estimating electrical and ER properties. A procedure has been developed to coat colloidal polystyrene (PS) core within a PANI shell by chemical oxidation polymerization. The core-shell particles can be turned into spherical hollow PANI shells by dissolution of the PS cores by using organic solvent. The sedimentation of prepared hollow PANI spheres with nano-sized particle in the silicone oil (506) was observed using UV spectrum with time. Also, the suspension showed ER response and good dispersion stability in the silicone oil. (c) 2005 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV Novel approach to enhance the dispersion stability of ER fluids based on hollow polyaniline sphere particle Article 10.1016/j.colsurfa.2005.08.030 1 COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, v.274, no.1-3, pp.37 - 42 COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 274 1-3 37 42 N scie scopus 000235358100006 2-s2.0-31144470167 Chemistry, Physical Chemistry Article ELECTRORHEOLOGICAL FLUIDS POLYPYRROLE MECHANISMS POLYMERS dispersion stability ER fluids polyaniline hollow sphere sedimentation test