Bonini Massimo, Lenz Sebastian, Falletta Ester, Ridi Francesca, Carretti Emiliano, Fratini Emiliano, Wiedenmann Albrecht, Baglioni Piero
Department of Chemistry and CSGI, University of Florence, via della Lastruccia 3-50019 Sesto Fiorentino, Florence, Italy.
Langmuir. 2008 Nov 4;24(21):12644-50. doi: 10.1021/la802425k. Epub 2008 Oct 10.
Nanocomposite materials consisting of CoFe2O4 magnetic nanoparticles and a polyethylene glycol-acrylamide gel matrix have been synthesized. The structure of such materials was studied by means of small-angle scattering of X-rays and polarized neutrons, showing that the CoFe2O4 nanoparticles were successfully and homogeneously embedded in the gel structure. Magnetic, viscoelastic, and water retention properties of the nanocomposite gel confirm that the properties of both nanoparticles and gel are combined in the resulting nanomagnetic gel. Scanning electron microscopy highlights the nanocomposite nature of the material, showing the presence of a gel structure with different pore size distributions (pores with micron and nano-size distributions) that can be used as active sponge-like nanomagnetic container for water-based formulations as oil-in-water microemulsions.
由CoFe2O4磁性纳米颗粒和聚乙二醇 - 丙烯酰胺凝胶基质组成的纳米复合材料已被合成。通过X射线小角散射和极化中子对这类材料的结构进行了研究，结果表明CoFe2O4纳米颗粒成功且均匀地嵌入到凝胶结构中。纳米复合凝胶的磁性、粘弹性和保水性能证实，纳米颗粒和凝胶的性能在所得的纳米磁性凝胶中得以结合。扫描电子显微镜突出了该材料的纳米复合性质，显示出具有不同孔径分布（微米级和纳米级分布的孔）的凝胶结构的存在，这种结构可用作水基制剂（如水包油微乳液）的活性海绵状纳米磁性容器。
