Water-Soluble Interpolyelectrolyte Complex Based on Poly(diallyldimethylammonium chloride) and Sodium Polyacrylate as a Component for Creating Stable Biocidal Coatings

• Published in: Colloid journal of the Russian Academy of Sciences Vol. 85; no. 3; pp. 433 - 441
• Main Authors: Pigareva, V. A., Bol’shakova, A. V., Marina, V. I., Sybachin, A. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.06.2023; Springer Nature B.V
• Subjects: Acrylic resins; Biocides; Chemistry; Chemistry and Materials Science; Chlorides; Phase separation; Polyelectrolytes; Polymer Sciences; Protective coatings; Sodium; Substrates; Surfaces and Interfaces; Thin Films; Water chemistry
• ISSN: 1061-933X; 1608-3067
• DOI: 10.1134/S1061933X23600100

Polycation-based coatings represent a promising class of protective antimicrobial coatings. Water-soluble complexes of poly(diallyldimethylammonium chloride) (PDADMAC) with sodium polyacrylate (PANa) have been studied by turbidimetry. It has been shown that the addition of the polyanion (12 mol %) to the polycation leads to the formation of an interpolyelectrolyte complex (IPEC) stable with respect to phase separation in water-salt media with salt concentrations as high as 0.1–0.2 M. In contrast to the traditional method of obtaining coatings from IPEC by layer-by-layer deposition, we have studied the preparation of the coatings directly from a solution of water-soluble IPEC on a hydrophilic glass surface and a surface of more hydrophobic polycarbonate. It has been found that the formation of IPEC makes it possible to increase the resistance of the coating to wash-off with water compared to the individual PDADMAC coating on both types of substrates.