Instituto de Ciencia y Tecnologia de Polimeros, CSIC, Juan de la Cierva, 6 Madrid, 28006, Spain.
Langmuir. 2009 Nov 17;25(22):13212-8. doi: 10.1021/la902441s.
The structural organization of iron oxide nanoparticles (NPs) obtained through in situ coprecipitation of iron salts in semi-interpenetrating polymer networks (semi-IPNs) constituted of alginate (Alg) and poly(N-isopropylacrylamide) (PNiPAAm) has been investigated by means of small-angle X-ray scattering and transmission electron microscopy. The oxidation reaction was repeated up to two times to increase the amount of iron oxide NPs formed. The results were compared to the synthesis of iron oxide nanoparticles in an alginate solution. It has been demonstrated that the polymeric gel acts as a spatial framework for iron oxide nanoparticles that controls their particle size distribution and that the application of repeating oxidation cycles does not increase the polydispersity of the iron oxide nanoparticles.
采用原位共沉淀法在藻酸盐（Alg）和聚（N-异丙基丙烯酰胺）（PNiPAAm）组成的互穿聚合物网络（semi-IPNs）中制备了氧化铁纳米粒子（NPs），通过小角 X 射线散射和透射电子显微镜对其结构组织进行了研究。氧化反应重复进行了两次，以增加形成的氧化铁 NPs 的数量。结果与在藻酸盐溶液中合成氧化铁纳米粒子进行了比较。结果表明，聚合物凝胶作为氧化铁纳米粒子的空间框架，控制其颗粒尺寸分布，并且重复氧化循环的应用不会增加氧化铁纳米粒子的多分散性。
