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Preparation of poly (ethylene oxide)-graft-poly (acrylic acid) copolymer stabilized iron oxide nanoparticles via an in situ templated process

机译:通过原位模板化工艺制备聚环氧乙烷-接枝-聚丙烯酸(丙烯酸)共聚物稳定的氧化铁纳米粒子

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Superparamagnetic iron oxide nanoparticles were prepared in the presence of poly (ethylene oxide)graft-poly (acrylic acid) copolymers via an in situ templated coprecipitation process. The resulted composite nanoparticles consisted of clusters of iron oxide monocrystals embedded inside the polymer chains, and were highly dispersible in aqueous solution. hi these graft copolymers, the PAA segments were chemisorbed onto the Fe3O4 nanoparticle surface through their carboxylic acid groups by forming carboxylate groups with the Fe atoms, while PEO segments as the stabilizers extended into the water matrix. Thus the composite nanoparticles exhibited narrow size distribution by the dynamic light scattering measurement. X-ray diffraction and magnetometer data confirmed the crystalline structure and superparamagnetic property of the particles. This procedure provided a good choice for preparing stable iron oxide magnetic nanoparticles with PEO modified surfaces. (c) 2008 Wiley Periodicals, Inc.
机译:在原位模板共沉淀过程中,在聚环氧乙烷接枝聚丙烯酸共聚物的存在下制备了超顺磁性氧化铁纳米粒子。所得的复合纳米颗粒由嵌入聚合物链内部的氧化铁单晶簇组成,并且在水溶液中高度分散。在这些接枝共聚物中,PAA链段通过与Fe原子形成羧酸酯基团,通过其羧酸基团被化学吸附到Fe3O4纳米颗粒表面,而PEO链段作为稳定剂则延伸到水基中。因此,通过动态光散射测量,复合纳米颗粒表现出窄的尺寸分布。 X射线衍射和磁力计数据证实了颗粒的晶体结构和超顺磁性。该程序为制备具有PEO改性表面的稳定的氧化铁磁性纳米粒子提供了一个很好的选择。 (c)2008年Wiley Periodicals,Inc.

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