Water-Dispersible Tetrablock Copolymer Synthesis, Aggregation, Nanotube Preparation, and Impregnation
Water-Dispersible Tetrablock Copolymer Synthesis, Aggregation, Nanotube Preparation, and Impregnation
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DOI：
10.1021/la035263w
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发表时间：
2003-11
期刊：
影响因子：
3.9
通讯作者：
Z. Li;Guojun Liu
中科院分区：
文献类型：
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作者：
Z. Li;Guojun Liu
合成了一种四嵌段共聚物聚异戊二烯-嵌段聚（丙烯酸叔丁酯）-嵌段聚[（2-肉桂酰氧乙基甲基丙烯酸酯）-ran-（2-甲基丙烯酸羟乙基）]-嵌段聚（甲基丙烯酸溶胶）或PI-b-PtBA-b-P(cma -r- hema)-b- psma。在PSMA水解成聚（甲基丙烯酸甘油酯）或PGMA后，四块体在水中形成圆柱形聚集体，具有PGMA电晕和由PI和P（cma -r- phema）核壳圆柱体组成的不溶性部分，它们夹在PtBA薄层中。通过P（cma -r- hema）交联和臭氧解理，得到了水分散纳米管。含有臭氧化PI片段的纳米管和交联PI-b- ptba -b- p (cma -r- hema)-b-PGMA圆柱形聚集体都通过Pd2+和PI双键之间形成π-烯丙基络合物从二甲基甲酰胺中吸附Pd2+。吸附的Pd2+被还原成Pd纳米粒子，并通过催化Pd在表面进一步沉积使粒子重叠。
A tetrablock copolymer polyisoprene-block-poly(tert-butyl acrylate)-block-poly[(2-cinnamoyloxyethyl methacrylate)-ran-(2-hydroxyethyl methacrylate)]-block-poly(solketal methacrylate), or PI-b-PtBA-b-P(CEMA-r-HEMA)-b-PSMA, was synthesized and characterized. After PSMA hydrolysis to poly(glyceryl methacrylate), or PGMA, the tetrablock formed cylindrical aggregates in water with a PGMA corona and an insoluble part consisting of PI and P(CEMA-r-PHEMA) core−shell cylinders that sandwich a PtBA thin layer. Water-dispersible nanotubes were obtained after the cross-linking of the P(CEMA-r-HEMA) layer and cleavage of the PI cores with ozone. Both nanotubes containing some ozonized PI fragments and the cross-linked PI-b-PtBA-b-P(CEMA-r-HEMA)-b-PGMA cylindrical aggregates sorbed Pd2+ from dimethylformamide as a result of the π-allyl complex formation between Pd2+ and the PI double bonds. The sorbed Pd2+ was reduced to Pd nanoparticles, and the particles were made to overlap by catalyzing further Pd deposition on the...