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...

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Bibliographic Details
Published in:Colloid and polymer science 2019-06, Vol.297 (6), p.883-889
Main Authors: Meng-Yuan, Zhang, Shen, Qing
Format: Article
Language:English
Subjects:
Assembly
Charging
Electric potential
Electrons
Multilayers
Polyelectrolytes
Raw materials
Reduction
Surface tension
Wettability
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Summary: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.
ISSN:0303-402X
1435-1536
DOI:10.1007/s00396-019-04513-6