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Synthesis and sorption properties of organo-mineral sorbents based on poly(styrene-b-4-vinylpyridine) copolymer
Molecular Crystals and Liquid Crystals ( IF 0.7 ) Pub Date : 2022-08-09 , DOI: 10.1080/15421406.2022.2091268
M. S. Tovstenko-Zabelin 1 , L. O. Vretik 1 , E. S. Yanovska 1 , O. Kondratenko 2 , D. Sternik 3 , O. A. Nikolaeva 1 , I. O. Savchenko 1
Affiliation  

Abstract

New organo-mineral composites SiO2/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 1H 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.



中文翻译:

基于聚(苯乙烯-b-4-乙烯基吡啶)共聚物的有机矿物吸附剂的合成及吸附性能

摘要

新型有机矿物复合材料 SiO 2 /聚(苯乙烯-b-4-乙烯基吡啶)通过嵌段共聚物聚(苯乙烯-b-4-乙烯基吡啶)的吸附得到,苯乙烯(St)和 4-乙烯基吡啶(4)的摩尔比为-VP) St:4-VP = 1:4 和 St:4-VP = 1:5 从 THF 溶液到硅胶表面。通过苯乙烯与 RAFT 剂的受控自由基聚合并进一步与 4-乙烯基吡啶共聚来合成嵌段共聚物。还获得了具有硫醇端基的嵌段共聚物,并已用于制备复合材料。使用1确定嵌段共聚物的组成和所得复合材料的表面形态H NMR 和 FT-IR 光谱、差示扫描量热法、热重分析和扫描电子显微镜。已确定有机矿物复合材料对 Pb(ІІ)、Fe(ІІІ) 和 Cu(ІІ) 离子的吸附能力是母体硅胶的 2-4 倍。

更新日期:2022-08-09
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