Core‐Shell Structured Monodisperse Poly(3,4‐Ethylenedioxythiophene)/Poly(Styrenesulfonic Acid) Coated Polystyrene Microspheres and Their Electrorheological Response

Abstract

We report the successful synthesis of transparent thin film of conducting poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonic acid) (PEDOT/PSS) coated monodisperse polystyrene (PS) microspheres via a simple physical adsorption route in an aqueous media and their electrorheological (ER) application under an applied electric field. Due to the insulating PS core, the PEDOT/PSS wrapped PS (PEDOT/PSS/PS) particles possess a low volume conductivity appropriately applied as ER active materials. Tested by a rotational rheometer under an applied electric field, the PEDOT/PSS/PS based ER fluid dispersed in a silicone oil shows a typical Bingham-fluid behavior with increased yield stresses according to the increase of electric field strength.

Monodisperse poly(2-methylaniline) coated polystyrene core–shell microspheres fabricated by controlled releasing process and their electrorheological stimuli-response under electric fields

“…Core-shell structured particles, possessing a thin conducting over-layer and a polymeric or inorganic core, are a type of welldesigned ER material that have attracted considerable attention because of their many benefits such that these particles combine the field-responsive properties of conducting shells and the morphological effects of core particles. In previous studies, simple and controllable methods were designed to prepare PANI, poly (3,4-ethylenedioxythiophene) or inorganic-coated poly(-methyl methacrylate) [20,21] or polystyrene (PS) [22] microspheres. As conducting materials, carbon nanotubes [23] and graphene oxide [24] have also been applied as shell materials.…”

Charge carrier relaxation studies in poly (3, 4-ethylenedioxythiophene) nanofibers

“…For its interesting electronic properties it has versatile applications in different fields such as organic light-emitting diodes, sensors, p h o t o d i o d e s , e l e c t r o c h r o m i c w i n d o w s a n d a s electrorheological materials etc. [5][6][7]. Most of the dynamical features e.g., polarizations of dipoles in condensed matter are accompanied by the motion of charge carriers.…”

“…poly(3,4-ethylenedioxythiophene) (PEDOT), as a polythiophene derivatives has gained considerable interest among the researchers because of the possibility of producing a material with linear chains due to the blocking of the 3, 4-positions of the thiophene ring [4]. Due to this reason it shows high electrical conductivity, high thermal stability, low band gap and more environmentally friendly nature [5]. For its interesting electronic properties it has versatile applications in different fields such as organic light-emitting diodes, sensors, p h o t o d i o d e s , e l e c t r o c h r o m i c w i n d o w s a n d a s electrorheological materials etc.…”

New electrorheological fluid obtained from mercaptosilsesquioxane-modified silicate suspensions

“…ER fluids are colloidal suspensions of polarizable solid organic or inorganic particles dispersed in a non-conducting liquid such as silicone oil, kerosene, paraffin, vegetable oil or halogenated hydrocarbon [10][11][12]. Since the pioneer work of Winslow on this subject [13], several particles have been employed on the development of electrorheological fluids, such as silica [14][15][16][17][18], titaniacoated silica [19], core-shell systems involving inorganic particles coated with organic compounds [20], conducting polymer in a semiconducting regime, coated polymer microspheres [21,22] confined into clay platelets [23,24] or into porous silica [25,26], etc.…”