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Journal of Materials Science

, Volume 42, Issue 13, pp 4838–4844 | Cite as

Preparation and characterization of polyurea microcapsules containing colored electrophoretic responsive fluid

  • G. Li
  • Y. Q. FengEmail author
  • X. G. Li
  • P. Gao
  • J. Wang
  • J. Y. Xie
Article

Abstract

A kind of yellow–red microencapsulated electronic ink was prepared by interfacial polymerization. The shell of the polyurea (PU) microcapsules was fabricated from tolyene 2,4-diisocyanate (TDI) and triethylene tetraamine (TETA). Pigment Hansa Yellow 10G, as negatively charged electrophoretic particles, was homodispersed in tetrachloroethylene (TCE)/cyclohexane mixture to make the suspending fluid core. And Oil Red was also added in the core to make a red background. Emulsifiers influencing the dispersing process were experimentally investigated. PU microcapsules were characterized on structure, mean particle size and size distribution, morphology with FT-IR, ESEM and image analyzer. The prepared microcapsules were regular, transparent, smooth and optically clear, and had a wall thickness of around 1.5 μm and an excellent sealing property. The electric response behaviors of the electronic ink were studied under electrostatic field. The yellow particles moved quickly and reversibly inside the microcapsules while the electric field alternated, with a response time of 150 ms approximately at E = 30 V/mm.

Keywords

Polyurea Urea Formaldehyde Interfacial Polymerization Pigment Particle Urea Formaldehyde 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgement

This work was supported by the National High Technology Research and Development Program of China (863 Program) (Grant No.2004AA302010).

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • G. Li
    • 1
  • Y. Q. Feng
    • 1
    Email author
  • X. G. Li
    • 1
  • P. Gao
    • 1
  • J. Wang
    • 1
  • J. Y. Xie
    • 1
  1. 1.Department of Chemical Engineering and TechnologyTianjin UniversityTianjinP.R. China

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