RETRACTED ARTICLE: Formation of polyelectrolyte multilayer films with controlled wettability via layer-by-layer electric-assembly


Taking the positive charged poly (diallyldimethylammonium chloride), PDDA, and negative charged polymaleic acid, PMA, as raw materials, the polyelectrolyte multilayer film, PMF, with oppositely charged surfaces was prepared by the layer-by-layer electric-assembly, LBLEA, method. Experimentally, the applied voltage was varied and the electrostatic force, EF, was controlled in enhancement or reduction, respectively. Results showed that these PMFs have oppositely surface wettability because the PDDA surface was sensitively responded to the voltage increase with EF enhancement to form the hydrophobic C=C structure, and the PMA surface was oppositely sensitively responded to the voltage increase with EF reduction to form the hydrophilic Cl–COOH structure, respectively. A related mechanism has been discussed by investigating the effect of voltage increase on the surface tension of these two polyelectrolyte solutions.

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Change history

  • 23 June 2020

    The editors have retracted this article [1] because after publication concerns were raised regarding the validity of the conclusions drawn.


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Donghua University financially supported this work.

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Correspondence to Qing Shen.

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The editors have retracted this article because after publication concerns were raised regarding the validity of the conclusions drawn. Post-publication peer review has revealed that the experimental procedure is not described adequately, that the assignment of the signals in the Fourier-Transform infrared spectra are partially wrong, and that the mechanism proposed for the effect of the applied voltages on the surface tension is not justified by the data. The main claim of the paper cannot be reliably reached. All authors do not agree to this retraction.

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Zhang, M., Shen, Q. RETRACTED ARTICLE: Formation of polyelectrolyte multilayer films with controlled wettability via layer-by-layer electric-assembly. Colloid Polym Sci 297, 883–889 (2019).

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  • Polyelectrolyte multilayer film
  • Layer-by-layer electric-assembly
  • Electrostatic forces
  • Wettability