2016 (3) 6

https://doi.org/10.15407/polymerj.38.03.225

Biocompatible nanocomposites based on polyurethane-poly(2-hydroxyethyl methacrylate) matrix and filler modified by biologically active amino acid glycine: structure and thermodynamics of interactions

L.V. Karabanova, Yu.P. Gomza, S.D. Nesin, O.M. Bondaruk, E.F. Voronin, L.V. Nosach

Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivske shose, Kyiv, 02660, Ukraine; BondarukOksanaM@i.ua

Chuiko Institute of Surface Chemistry NAS of Ukraine

17, General Naumov str., Kyiv, 03680, Ukraine

Polym. J., 2016, 38, no. 3: 225-235.

Section: Structure and properties.

Language: Ukrainian.

Abstract:

The biocompatible nanocomposites based on polyurethane, poly(2-hydroxyethyl methacrylate) (РНЕМА) and nanosilica modified by biologically active amino acid glycine are synthesized. The structure of the created nanocomposites was investigated by small-angle X-ray scattering. The dependence of the characteristics from the content of polymer matrix’s components and nanofiller concentration was detected. The thermodynamic parameters of interaction between polymer matrix and nanofiller during formation of the nanocomposites were investigated.It was shown that the free energy of mixing of polyurethane, PHEMA and semi-IPNs with filler is negative for systems with low content of PHEMA, and thus the energy is released during process of the nanocomposites formation, and dence, durable polymer layers on the surface of nanofiller are formed. With increasing the PHEMA content the free energy of mixing moves to the positive value, which is the result of competition of two processes: the formation of dense surface layers on the surface of the filler, and the formation of interfacial layers with excess free volume.

Key words: nanocomposites, polyurethane, poly(2-hydroxyethyl methacrylate), biologically active substances, glycine, structure, thermodynamics interactions.

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