№3 (2017) 3

https://doi.org/10.15407/polymerj.39.03.163

Structure and properties of sol-gel synthesized silver-containing hybrid oligourethane-siloxane systems

А.L. Tolstov1, V.F. Matyushov1, O.N. Malanchuk2, D.A. Klimchuk3, E.V. Lebedev1 

1 Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivs’ke shose, Кyiv, 02160, Ukraine; E-mail: tolstov@nas.gov.ua

2 Institute of Molecular Biology and Genetics NAS of Ukraine

150, Zabolotnogo str., Kyiv, 03680, Ukraine

3 N.G. Kholodny Institute of Botany NAS of Ukraine

2, Tereshchenkivska str., Kyiv, 01601, Ukraine

Polym. J., 2017, 39, № 3: 163-170.

Section: Structure and properties.

Language: Russian.

Abstract:

Hybrid materials were synthesized by interaction of oligomeric diisocyanate with 3-aminopropyltriethoxysilane (APTS) and sol-gel processing of oligomer-monomer composition. A formation of hybrid network as a result of coupling of –NCO and –NH2 functionalized components, and a condensation of –Si(OC2H5)3 terminated oligomer and excess of APTS was detected by FTIR. In accordance with EDX microanalysis a growing APTS content from 50 to 70 % wt. initiates phase inversion process and non-uniform distribution of components and active additives in a bulk of hybrid compositions were observed. The results demonstrate an increasing averaged molecular weight between cross-links from 525 to 554 Da, decreasing crosslinking density from 1,51 to 1,38 mmol/cm3, and increasing theoretical hybrid network mesh size from 2,6 to 4,1 nm while APTS content grows up to 70 wt.%. Appropriate changes in molecular structure parameters of hybrid matrix and its chemical nature increase a sorption capacity of the composites against H2O from 700 to 2400 %. Introducing Ag+ into hybrid composites and its UV irradiation pretreatment provides a high bactericidal effect.

Keywords: oligourethane, silsesquioxane, hybrid materials, sol-gel synthesis, bactericidal activity.

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