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

Chan Soo Jun; Seung Hyuk Kwon; Hyoung Jin Choi; Yongsok Seo

doi:10.1021/acsami.7b13808

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

ACS Appl Mater Interfaces. 2017 Dec 27;9(51):44811-44819. doi: 10.1021/acsami.7b13808. Epub 2017 Dec 14.

Authors

Chan Soo Jun¹, Seung Hyuk Kwon¹, Hyoung Jin Choi¹, Yongsok Seo²

Affiliations

¹ Department of Polymer Science and Engineering, Inha University , Incheon 22212, Korea.
² RIAM, Department of Materials Science and Engineering, Seoul National University , Seoul 151-744, Korea.

PMID: 29193955
DOI: 10.1021/acsami.7b13808

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.

Keywords: Pickering emulsion polymerization; core−shell; electrorheology; nanoparticle; polyaniline.