Photocontrol of zeta-potential of cationic polystyrene particles prepared by soap-free emulsion copolymerization

Hiroaki Kishimoto, Masaru Nakagawa, Tomokazu Iyoda, Masaru Watanabe, Katsutoshi Nagai

Research output: Contribution to conferencePaper

Abstract

We report the photo-oxidation method for preparing aqueous dispersions containing charge-photocontrollable cationic polystyrene particles with uniform diameter. The cationic polystyrene particles prepared by soap-free emulsion copolymerization had an average diameter of 195 nm and a zeta potential of +59 mV in aqueous solution containing 10 mmol/dm3 NaCI. When the aqueous dispersion containing the particles was irradiated with UV light, the zeta-potential was shifted negatively and the average diameter was maintained after UV exposure. FT-IR and elemental analysis suggested that carboxy groups were formed at a surface of the cationic polystyrene particles by photo-oxidation.

Original languageEnglish
Number of pages1
Publication statusPublished - 2005 Dec 1
Externally publishedYes
Event54th SPSJ Annual Meeting 2005 - Yokohama, Japan
Duration: 2005 May 252005 May 27

Other

Other54th SPSJ Annual Meeting 2005
CountryJapan
CityYokohama
Period05/5/2505/5/27

Keywords

  • Photo-oxidation
  • Photocontrol
  • Soap-free emulsion copolymerization
  • Surface reformation
  • Zeta-potential

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Kishimoto, H., Nakagawa, M., Iyoda, T., Watanabe, M., & Nagai, K. (2005). Photocontrol of zeta-potential of cationic polystyrene particles prepared by soap-free emulsion copolymerization. Paper presented at 54th SPSJ Annual Meeting 2005, Yokohama, Japan.