稀土改性氧化石墨烯的制备及表征

发布时间：2018-06-15 21:27

本文选题：稀土 + 氧化石墨烯　；参考：《功能材料》2017年10期

【摘要】：石墨烯独特的物理、化学和力学性能为复合材料的开发奠定了重要基础,是各种复合材料的理想增强体,但石墨烯分散性和湿润性差的问题严重限制了其在复合材料中的进一步应用。采用浸润法和加热改性剂法制备了稀土改性氧化石墨烯(RE-M-GO),利用X射线衍射(XRD)和扫描电子显微镜(SEM),能谱仪(EDS)对RE-M-GO的形貌和相结构进行了表征;并结合傅里叶变换红外(FT-IR)和紫外光谱仪器(UV),分析了改性氧化石墨烯的官能团结构的变化,探讨了其改性机理。结果表明,稀土改性的氧化石墨烯的分散性有明显的改善,主要是由于稀土元素与氧化石墨烯的含氧官能团进行反应形成配位键,生成了新的官能团,降低了氧化石墨烯的界面能及表面能,从而改善了氧化石墨烯的分散性。
[Abstract]:The unique physical, chemical and mechanical properties of graphene lay an important foundation for the development of composites and are ideal reinforcements for all kinds of composites. However, the problem of poor dispersion and wettability of graphene severely limits its further application in composites. Rare earth modified graphene oxide (RE-M-GOA) was prepared by soakage method and heating modifier method. The morphology and phase structure of RE-M-GO were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The changes of functional group structure of modified graphene oxide were analyzed and the modification mechanism was discussed by means of Fourier transform infrared spectroscopy (FTIR) and ultraviolet spectrometer (UV). The results show that the dispersion of graphene oxide modified by rare earth is obviously improved, mainly because rare earth elements react with oxygen functional groups of graphene oxide to form coordination bonds and form new functional groups. The interfacial and surface energy of graphene oxide is reduced, and the dispersion of graphene oxide is improved.
【作者单位】：江西理工大学工程研究院;
【基金】：国家自然科学基金资助项目(51561007) 江西省自然科学基金资助项目(20161BBM26036)
【分类号】：TQ127.11

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