Nanostructured surfaces

Synthesis and sorption properties of silica gel modified with poly(4-vinylpyridine-b-styrene) copolymer
M. Tovstenko-Zabelin1, L.O. Vretik1, E.S. Yanovska1, O.A. Nikolaeva1, I.O. Savchenko1,O. Kondratenko2, D. Sternik3

1 Taras Shevchenko National University of Kyiv, Volodymyrs’ka Str., 64/13, Kyiv-01601, Ukraine
E-mail: lvretik@gmail.com; elina_yanovska@ukr.net
2 Ivan Franko Zhytomyr State University, 42 Pushkina  Str., 10008 Zhytomyr, Ukraine
3Maria Curie-Skłodowska University, 2 Maria Curie-Sklodowska Sq., 20-031 Lublin, Poland

Surface modification of porous inorganic materials with pyridine-based polymers was proved in our investigations [1,2] as perspective approach to produce new composite materials that can be employed as effective sorbents of metal cations. In situ immobilization of 4-vinylpyridine and styrenene statistic copolymers on an inorganic carriers was carried out by precipitated radical polymerization of these monomers in the presence of silica gel or saponite clay. Obtained organo-mineral composites showed high sorption capacity to Pb (II), Cd (II), Zn (II), Cu (II), and Fe (III) ions.
This work is devoted to the syntheses  of block-copolymers of 4-vinylpyridine and styrene by RAFT polymerization. The obtained S-functionalized block-copolymers were immobilized on the silica gel mineral carriers from the THF solutions. The amount of immobilized copolymer was calculated by thermogravimetry.  The sorption properties of the obtained organo-mineral composites towards Pb (II), Cu (II), Fe (III) ions will be discussed.

1.	Yanovska E.S., Vretik L.O., Nikolaeva O.A. et al Synthesis and adsorption properties of 4-vinylpyridine and styrene copolymer in situ immobilized on silica surface // Nanoscale Research Letters.- 2017.- 12.- P. 217-222.
2.	Yanovska E.S., Vretik L.O., Kondratenko O. et al Synthesis and adsorption properties of 4-vinylpyridine, styrene and maleic anhydride copolymer in situ immobilized on silica surface // Molecular Crystals and Liquid Crystals.- 2018.- 672 (1, part 3), 104-114.