Polymeric Nanoparticle-Coated Pickering Emulsion-Synthesized Conducting Polyaniline Hybrid Particles and Their Electrorheological Study

Abstract

To produce an electric stimuli-responsive electrorheological (ER) material, semiconducting core/shell-type polyaniline (PANI) hybrid particles were fabricated through Pickering emulsion-type polymerization, using poly(divinylbenzene-alt-maleic anhydride) (PDVMA) particles as a solid surfactant. The PDVMA nanoparticles were initially polymerized using a self-stable precipitation method. The fabricated PANI/PDVMA composite particles were subjected to various chemical characterizations; further, they were suspended in silicone oil at 10 vol % to prepare an ER fluid, and their viscoelastic behaviors were scrutinized using a rheometer under various input electric fields. We also adopted an LCR meter to evaluate its dielectric characteristics. Our results showed that the PANI/PDVMA composite particles display typical ER performance, such that both dynamic and elastic yield stresses follow a polarization mechanism with a slope of 2.0.

Electrorheological behavior of iron(ii) oxalate micro-rods

“…The observed ER performance is thus comparable with that of recently-developed ER uids containing the particles prepared via multi-step syntheses. 23,24 Hence, the presented material in this study can be characterized by two benets, the sufficient ER performance and its facile synthesis not requiring any special or toxic chemicals.…”

Reversible Actuation Ability upon Light Stimulation of the Smart Systems with Controllably Grafted Graphene Oxide with Poly (Glycidyl Methacrylate) and PDMS Elastomer: Effect of Compatibility and Graphene Oxide Reduction on the Photo-Actuation Performance

“…Smart materials belong to a group of matters. Such physical properties can be changed upon external stimulus i.e., electric [1,2,3,4] or magnetic field [5,6,7,8], pH [9,10,11,12], temperature [13,14,15,16], or light [17,18,19,20]. The systems exhibiting reversible photo-actuation and light-responsive properties are vital for the research community only during the last decade while the rest of the above mentioned properties have been part of the research community over the past 30 years.…”

Magnetic Polymer Composite Particles: Design and Magnetorheology

“…Both shear viscosity and elastic modulus of the MR fluids increase sharply, and they can be controlled by adjusting the magnetic field strength. All these characteristics are closely related to the formulation of the MR fluids such as the magnetism, shape, and size of the MR particles and the medium oil viscosity [32,33]. Similar behavior is shown by MR gels and MR elastomers when the fluid medium is replaced with gels and elastomers, respectively.…”