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.

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。