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本文采用原子转移自由基聚合方法合成了聚丙烯酸叔丁酯-聚丙烯腈嵌段共聚物(PtBA-b-PAN),酸解得到聚丙烯酸-聚丙烯腈两亲嵌段共聚物(PAA-b-PAN).随后,PAA-b-PAN嵌段共聚物在水溶液中自组装形成以PAA为壳,PAN为核的胶束.用此胶束为模板,加入FeCl3溶液后得到了壳层负载Fe3+的聚合物纳米粒子,经230℃空气中预氧化,600℃氮气氛煅烧,得到了核壳结构的,具有磁性的碳纳米粒子.用1HNMR,IR,GPC,TGA,TEM,XRD,AGM等技术对嵌段共聚物及纳米粒子进行了表征,结果表明纳米粒子的壳层含γ-Fe2O3,Fe2.5C混合物,核含碳,直径为35±5nm,饱和磁化强度为2.16emu/g.在分离、吸波和传感器等方面具有潜在的应用前景.
In this paper, poly (t-butyl acrylate) / polyacrylonitrile block copolymer (PtBA-b-PAN) was synthesized by atom transfer radical polymerization. The polyacrylic acid-polyacrylonitrile amphiphilic block copolymer -PAN) .After that, the PAA-b-PAN block copolymer self-assembled in aqueous solution to form micelles with PAA shell and PAN nucleus.Using this micelles as a template, the Fe3 + Of polymer nano-particles, which were pre-oxidized in air at 230 ℃ and calcined in nitrogen atmosphere at 600 ℃ to obtain magnetic nanoparticles with core-shell structure. The structures of the polymer nanoparticles were characterized by 1HNMR, IR, GPC, TGA, TEM, XRD and AGM The block copolymer and the nanoparticles were characterized, the results show that the shell of the nanoparticles containing γ-Fe2O3, Fe2.5C mixture, the core containing carbon, a diameter of 35 ± 5nm, a saturation magnetization of 2.16emu / g in the separation , Wave absorption and sensors have potential applications.