AC electrophoretic deposition of organic-inorganic composite coatings

Tomohiko Yoshioka, A. Chávez-Valdez, J. A. Roether, D. W. Schubert, A. R. Boccaccini

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Alternating current electrophoretic deposition (AC-EPD) of polyacrylic acid (PAA)-titanium oxide (TiO2) nanoparticle composites on stainless steel electrodes was investigated in basic aqueous solution. AC square wave with duty cycle of 80% was applied at a frequency of 1kHz. FTIR-ATR spectra showed that both AC and direct current (DC) EPD successfully deposited PAA-TiO2 composites. The deposition rate using AC-EPD was lower than that obtained in direct current DC-EPD. However, the microstructure and surface morphology of the deposited composite coatings were different depending on the type of electric field applied. AC-EPD applied for not more than 5min led to smooth films without bubble formation, while DC-EPD for 1min or more showed deposits with microstructural defects possibly as result of water electrolysis. AC-EPD was thus for the first time demonstrated to be a suitable technique to deposit organic-inorganic composite coatings from aqueous suspensions, showing that applying a square wave and frequency of 1kHz leads to uniform PAA-TiO2 composite coatings on conductive materials.

Original languageEnglish
Pages (from-to)167-171
Number of pages5
JournalJournal of Colloid and Interface Science
Volume392
Issue number1
DOIs
Publication statusPublished - Feb 15 2013
Externally publishedYes

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carbopol 940
Inorganic coatings
Composite coatings
Acids
Deposits
Conductive materials
Bubble formation
Titanium oxides
Stainless Steel
Composite materials
Deposition rates
Electrolysis
Surface morphology
Suspensions
Stainless steel
Electric fields
Nanoparticles
Defects
Microstructure
Electrodes

Keywords

  • Alternating current (AC)
  • Coatings
  • Composites
  • Electrophoretic deposition (EPD)
  • Nanoparticles
  • Polyacrylic acid (PAA)
  • Titanium oxide (TiO)

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Colloid and Surface Chemistry

Cite this

AC electrophoretic deposition of organic-inorganic composite coatings. / Yoshioka, Tomohiko; Chávez-Valdez, A.; Roether, J. A.; Schubert, D. W.; Boccaccini, A. R.

In: Journal of Colloid and Interface Science, Vol. 392, No. 1, 15.02.2013, p. 167-171.

Research output: Contribution to journalArticle

Yoshioka, Tomohiko ; Chávez-Valdez, A. ; Roether, J. A. ; Schubert, D. W. ; Boccaccini, A. R. / AC electrophoretic deposition of organic-inorganic composite coatings. In: Journal of Colloid and Interface Science. 2013 ; Vol. 392, No. 1. pp. 167-171.
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