膨胀石墨孔隙结构及表征方法研究进展

发布时间：2018-05-16 16:48

本文选题：膨胀石墨 + 显微结构　；参考：《化工进展》2017年02期

【摘要】：膨胀石墨是制备柔性石墨材料及相关制品的原料,其微观结构特性对柔性石墨制品有重要影响。本文简述了膨胀石墨中宏观-介观-微观多尺度的孔隙分布、孔隙尺寸、孔隙形貌等孔隙结构,论述了石墨粒度、氧化插层工艺、氧化程度、水洗工艺、膨化方式、破碎等加工处理对孔隙结构的影响,介绍了低温N2吸附法、压汞法(MIP)、扫描电子显微镜(SEM)等膨胀石墨孔隙结构传统表征技术的基本原理,总结了小角度X射线散射法(SAXS)、原子力显微镜法(AFM)、差示扫描热孔计法(DSCT)、核磁共振冷孔计法(NMRC)等表征方法的优缺点,提出今后应结合多种表征技术重点探索膨胀石墨介微观孔隙结构,以此为切入点探讨膨胀石墨的理化性能,有助于推动膨胀石墨孔隙结构的深入研究及在其他领域的应用。
[Abstract]:Expanded graphite is the raw material for the preparation of flexible graphite materials and related products. Its microstructure has an important influence on the flexible graphite products. In this paper, the pore distribution, pore size, pore morphology and other pore structures in expanded graphite are briefly described. The graphite particle size, oxidation intercalation process, oxidation degree, washing process and expansion mode are discussed. This paper introduces the basic principles of the traditional characterization techniques of pore structure of expanded graphite, such as low temperature N2 adsorption method, mercury injection method, scanning electron microscope (SEM) and so on. The advantages and disadvantages of small angle X-ray scattering (SAXS), atomic force microscopy (AFM), differential scanning calorimetry (DSCT) and nuclear magnetic resonance (NMR) were summarized. It is suggested that the microscopic pore structure of expanded graphite should be explored in combination with various characterization techniques, and the physical and chemical properties of expanded graphite should be explored as a starting point, which will be helpful to the further study of pore structure of expanded graphite and its application in other fields.
【作者单位】：武汉理工大学资源与环境工程学院矿物资源加工与环境湖北省重点实验室;
【基金】：国家科技支撑计划项目(2013BAE04B03)
【分类号】：TQ127.11

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