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首页> 外文期刊>Journal of Applied Polymer Science >Related physicochemical, rheological, and dielectric properties of nanocomposites of superparamagnetic iron oxide nanoparticles with polyethyleneglycol
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Related physicochemical, rheological, and dielectric properties of nanocomposites of superparamagnetic iron oxide nanoparticles with polyethyleneglycol

机译：用聚乙二醇的超顺磁性氧化铁纳米粒子纳米复合材料的相关物理化学，流变学和介电性能

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In this study, we present the physicochemical, rheological, and dielectric properties of the superparamagnetic iron oxide nanoparticles (SPIONs) coated with polyethyleneglycol (PEG). It was observed that the increase of the concentration of PEG prohibited the sedimentation of nanoparticles, which increased the colloidal stability of nanocomposites. The surface study of the polymer and the nanocomposites using TOF-SIMS showed that the samples did not have the same surface properties. The analysis of the intensity ratios of the FeO+/Fe+ and OH-/O- peaks of the nanocomposites of bare, positively, and negatively charged SPIONs with PEG revealed that no reduction occurred for these nanoparticles when coated with PEG, whereas the iron atoms on the surface of PEG negatively charged SPIONs were less oxidized than those on the surface of PEG-bare SPIONs, and the iron atoms on the surface of PEG positively charged SPIONs were more oxidized than the second ones. The rheological study of the polymer and the nanocomposites revealed that the presence of SPIONs did not change the rheological behavior of PEG. The analysis of the dielectric properties of PEG and its composites with SPIONs showed that when SPIONs particles (bare and positively charged) were included in PEG, low frequency dispersion (LFD) was strongly enhanced, that the iron oxide nanoparticles reduced the impedance of PEG in the nanocomposites and that the difference in their surface charge affected their impedance. Taken together, these results suggest that the nanocomposites of PEG with SPIONs have appropriate properties for fluid modification and applications in the nanotechnology and photovoltaic devices. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48280.
机译：在该研究中，我们介绍了涂有聚乙二醇（PEG）的超顺磁性氧化铁纳米颗粒（栓塞）的物理化学，流变学和介电性质。观察到PEG浓度的增加禁止纳米颗粒的沉降，这增加了纳米复合材料的胶体稳定性。使用TOF-SIMS的聚合物和纳米复合材料的表面研究表明，样品没有相同的表面性质。裸露的，正极的和带负电荷栓的纳米复合材料的FeO + / Fe +和OH- / O-峰的强度比分析显示，当涂有PEG时，这些纳米颗粒没有对这些纳米颗粒发生的降低，而铁原子PEG带负电荷的散热块的表面较少氧化，而不是PEG裸散的表面上的散热，并且PEG表面上的铁原子呈正电荷的散，比第二块更氧化。聚合物和纳米复合材料的流变学研究表明，酱的存在没有改变PEG的流变行为。 PEG的电介质性质及其复合材料的分析显示，当PEG中包括散氏颗粒（裸且带正电）时，强大地增强了低频分散（LFD），氧化铁纳米粒子降低了PEG的阻抗纳米复合材料和其表面电荷的差异影响其阻抗。总之，这些结果表明，PEG的纳米复合材料具有散氏的纳米复合材料具有用于流体改性和在纳米技术和光伏器件中的应用的适当性质。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,48280。

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