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首页> 外文期刊>Journal of inorganic and organometallic polymers and materials >Synthesis and Characterization of Novel Heat Resistant, Superparamagnetic Poly(ether-imide) Nanocomposites Containing Xanthene: Representing a Strategy for Improving Thermal Stability of Magnetic Polymer-Based Nanocomposites
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Synthesis and Characterization of Novel Heat Resistant, Superparamagnetic Poly(ether-imide) Nanocomposites Containing Xanthene: Representing a Strategy for Improving Thermal Stability of Magnetic Polymer-Based Nanocomposites

机译：含X吨的新型耐热，超顺磁性聚醚酰亚胺纳米复合材料的合成与表征：代表一种提高磁性聚合物基纳米复合材料热稳定性的策略

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Two superparamagnetic and heat resistant xanthene based poly(ether-imide) nanocomposites were successfully synthesized. Field emission scanning electron microscopy, transmission electron microscope, X-ray diffraction, thermal gravimetric analysis, vibrating sample magnetometer, Energy-dispersive X-ray spectroscopy and Fourier-transform infrared (FTIR) techniques were used for studying the morphology, crystalline phase, thermal stability and magnetization properties of the nanocomposites. The neat form of the corresponding poly(ether-imide) was also prepared by thermal imidization method and its structure was confirmed by FTIR, proton nuclear magnetic resonance (H-1 NMR), UV-Vis and photoluminescence (PL) spectroscopies. In order to investigate the effects of modifying the surface of Fe3O4 nanoparticles on thermal properties of the nanocomposites, the surface of Fe3O4 nanoparticles was coated with SiO2 and polysuccinimide (PSI), sequentially. Then, both the unmodified Fe3O4 and surface-modified Fe3O4 (Fe3O4@SiO2-PSI) nanoparticles were used as fillers for the polymer matrix. According to the results, the prepared nanocomposites were superparamagnetic and showed higher thermal stability in comparison to the neat poly(ether-imide). Furthermore, poly(ether-imide)/Fe3O4@SiO2-PSI (PIEN 10b) nanocomposite showed higher thermal stability and dispersed better in the polymer matrix [in comparison to poly(ether-imide)/Fe3O4 (PIEN 10 a)] due to the presence of imide groups and high hydroxyl content of the functional Fe3O4 nanoparticles which caused high interactions between poly(ether-imide) and functional Fe3O4. Furthermore, the presence of methyl, ether and bulky xanthene groups in the poly(ether-imide(backbone improved the solubility of the neat polymer in organic solvents. These properties can be very helpful for extending new applications of poly(ether-imide)s.
机译：成功地合成了两种超顺磁性和耐热的x吨基聚醚酰亚胺纳米复合材料。使用场发射扫描电子显微镜，透射电子显微镜，X射线衍射，热重分析，振动样品磁强计，能量色散X射线光谱和傅里叶变换红外（FTIR）技术来研究形态，晶相，热纳米复合材料的稳定性和磁化性能。还通过热酰亚胺化方法制备了相应的聚醚酰亚胺的纯净形式，并通过FTIR，质子核磁共振（H-1 NMR），UV-Vis和光致发光（PL）光谱证实了其结构。为了研究修饰Fe 3 O 4纳米颗粒的表面对纳米复合材料的热性能的影响，依次用SiO 2和聚琥珀酰亚胺（PSI）涂覆Fe 3 O 4纳米颗粒的表面。然后，未改性的Fe3O4和表面改性的Fe3O4（Fe3O4 @ SiO2-PSI）纳米颗粒均用作聚合物基质的填料。根据结果​​，所制备的纳米复合材料是超顺磁性的，与纯聚醚酰亚胺相比，具有更高的热稳定性。此外，聚醚醚酰亚胺/ Fe3O4 @ SiO2-PSI（PIEN 10b）纳米复合材料显示出更高的热稳定性，并且在聚合物基质中的分散性更好[与聚醚酰亚胺/ Fe3O4（PIEN 10a）相比]功能性Fe3O4纳米粒子的酰亚胺基团和高羟基含量的存在，导致聚醚酰亚胺与功能性Fe3O4之间发生高相互作用。此外，聚（醚酰亚胺）骨架中存在甲基，醚和庞大的x吨基团，提高了纯聚合物在有机溶剂中的溶解度。这些性质对于扩展聚（醚酰亚胺）的新应用非常有帮助。

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