4.7 Article

Modification of Polydiallyldimethylammonium Chloride with Sodium Polystyrenesulfonate Dramatically Changes the Resistance of Polymer-Based Coatings towards Wash-Off from Both Hydrophilic and Hydrophobic Surfaces

期刊

POLYMERS
卷 14, 期 6, 页码 -

出版社

MDPI
DOI: 10.3390/polym14061247

关键词

polycation; polyanion; interpolyelectrolyte complex; coating; sodium polystyrenesulfonate; polydiallyldimethylammonium chloride; AFM; SEM

资金

  1. Ministry of Science and Higher Education of the Russian Federation [075-15-2020-775]

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Polymer coatings based on polycations, such as PDADMAC, and their water-soluble complexes with polyanions, like PSS, were studied for their stability in water-salt media and application for antimicrobial coatings. The formation of stable interpolyelectrolyte complexes (IPEC) was shown to enhance the wash-off resistance of the coatings on different substrates. The study utilized techniques like dynamic light-scattering and microscopy for characterization.
Polymer coatings based on polycations represent a perspective class of protective antimicrobial coatings. Polydiallyldimethylammonium chloride (PDADMAC) and its water-soluble complexes with sodium polystyrenesulfonate (PSS) were studied by means of dynamic light-scattering, laser microelectrophoresis and turbidimetry. It was shown that addition of six mol.% of polyanion to polycation results in formation of interpolyelectrolyte complex (IPEC) that was stable towards phase separation in water-salt media with a concentration of salts (NaCl, CaCl2, Na2SO4, MgSO4) up to 0.5 M. Most of the polyelectrolyte coatings are made by layer-by-layer deposition. The utilization of water-soluble IPEC for the direct deposition on the surface was studied. The coatings from the PDADMAC and the PSS/PDADMAC complex were formed on the surfaces of hydrophilic glass and hydrophobic polyvinylchloride. It was found that formation IPEC allows one to increase the stability of the coating towards wash-off with water in comparison to individual PDADMAC coating on both types of substrates. The visualization of the coatings was performed by atomic force microscopy and scanning electron microscopy.

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