2019 (2) 6

Polymeric composites based on poly(vinyl butyral) and Ag+ ions containing aminated oligomeric silsesquioxanes

A.L. Tolstov, V.F. Matyushov, E.V. Lebedev

Institute of Macromolecular Chemistry of the NAS of Ukraine

48, Kharkivske shose, Kyiv, 02160, Ukraine; E-mail: a.tolstov@ukr.net

Polym. J., 2019, 41, no. 2: 130-135

Section: Synthesis of polymers.

Language: Ukrainian.

Abstract:

Here we proposed a method of synthesis of oligomeric silsesquioxanes by hydrolysis of amine-containing organosilicon compound, as well as their applying as a complex-forming agent and a carrier of Ag+ ions for producing bactericidal polymer composites and coatings. Introducing [H2N(CH2)3SiO1,5]n/Ag+ complex into poly (vinyl butyral) (PVB), as a polymer matrix, which has enhanced film-forming ability, allows to prepare the polymer composites with stabilized ionic silver. FTIR spectral analysis demonstrates a complexation interaction of highly reactive primary aminopropyl moieties of oligomeric silsesquioxanes with Ag+ ions when AgNO3 salt was introduced in reactive mixture. Analysis of morphology shows high level of heterogeneity of the composites obtained due to poor compatibility of the constituents. Oligomeric silsesquioxanes containing dispersed phase of the composites consists of the particles of spherical shape with averaged size of 258 ± 46 nm. Sub-micron size of dispersed phase reduces transparency of composite films compared to neat PVB films. The PVB polymer matrix and their composite are characterized by increased diffusion coefficients DH2O that values was determined as ~2‡10-6 cm2/s due to non-uniform distribution of hydrophilic structure fragments (hydroxyl groups, ionic functional additive) in neat PVB matrix or the composite. High Ag+ ion content provides moderate bactericidal activity of the polymer composites in spite of reduced hydrophilicity of PVB matrix. Due to enhanced exploitation characteristics the Polymeric materials obtained are recommended as coatings with improved protective and bactericidal properties.

Keywords: poly(vinyl butyral), oligomeric silsesquioxanes, silver, hydrophilicity, bactericidal properties.

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