Synthesis and sorption properties of organo-mineral sorbents based on poly(styrene-b-4-vinylpyridine) copolymer

• Published in: Molecular Crystals and Liquid Crystals Vol. 752; no. 1; pp. 8 - 22
• Main Authors: Tovstenko-Zabelin, M. S., Vretik, L. O., Yanovska, E. S., Kondratenko, O., Sternik, D., Nikolaeva, O. A., Savchenko, I. O.
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 11.02.2023; Taylor & Francis Ltd
• Subjects: Adsorption; Block copolymers; Calorimetry; Composite materials; Copolymerization; Copper; heavy metal ions; Infrared spectroscopy; NMR; Nuclear magnetic resonance; poly(4-vinylpyridine- b-styren); Polystyrene resins; RAFT-polymerization; Silica; Silica gel; silica gel surface modification; Silicon dioxide; Sorbents; Sorption; Styrene; Styrenes; Thermogravimetric analysis
• ISSN: 1542-1406; 1563-5287; 1527-1943
• DOI: 10.1080/15421406.2022.2091268

New organo-mineral composites SiO 2 /poly(styrene-b-4-vinylpyridine) were obtained by adsorption of block- copolymers poly(styrene-b-4-vinylpyridine) with molar ratios of styrene (St) and 4-vinylpyridie (4-VP) St:4-VP = 1:4 and St:4-VP = 1:5 from THF solution onto silica gel surface. Block-copolymers were synthesized by controlled radical polymerization of styrene with RAFT agent and further copolymerization with 4-vinylpyridine. Also blok-copolymer with thiol end-group was obtained and has been employed for preparation of the composite. Composition of the block-copolymers and surface morphology of composites obtained were determined using 1 H NMR and FT-IR spectroscopy, differential scanning calorimetry, thermogravimetric analysis and scanning electron microscopy. It was established that sorption capacity of the organo-mineral composites toward Pb(ІІ), Fe(ІІІ) and Cu(ІІ) ions is in 2-4 times higher in comparison with parent silica gel.