Journal of Materials Science

, Volume 42, Issue 2, pp 545–550

Improvement in properties of epoxy-based electrophoretic coating by silica/polyurethane nanocomposites

  • Yan Zhu
  • Duo-xian Sun
  • Hua Zheng
  • Ming Wei
  • Lian-meng Zhang
Article

DOI: 10.1007/s10853-006-1066-8

Cite this article as:
Zhu, Y., Sun, D., Zheng, H. et al. J Mater Sci (2007) 42: 545. doi:10.1007/s10853-006-1066-8

Abstract

Silica/polyurethane (SiO2/PU) nanocomposites, prepared by in situ formation of silica from tetraethoxysilane (TEOS) in cationic polyurethane microreactor, are used to modify epoxy resin-based electrophoretic coating. The co-electrophoresis property of silica/PU nanocomposites with epoxy particles is verified by X-ray photoelectronic spectroscopy (XPS) analysis of the electrophoretically prepared membrane. The particle sizes and size distribution in the aqueous paint show a considerable reduction as demonstrated by dynamic light scattering. The surface morphology is investigated by scanning electron microscope. The properties of SiO2/PU-modified electrophoretically prepared membrane have a significant improvement compared to those of unmodified and PU-modified membranes. It is noteworthy that both strength and toughness of the electrophoretically prepared membrane increase considerably due to incorporation of rigid silica encapsulated by tough PU.

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  • Yan Zhu
    • 1
  • Duo-xian Sun
    • 2
  • Hua Zheng
    • 1
  • Ming Wei
    • 1
  • Lian-meng Zhang
    • 3
  1. 1.School of Chemical Engineering and TechnologyWuhan University of TechnologyWuhanChina
  2. 2.School of Chemical Engineering and TechnologyTianjin UniversityTianjinChina
  3. 3.State Key Laboratory of Advanced Technology for Materials Synthesis ProcessingWuhan University of TechnologyWuhanChina

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