Advantages and limitations of the synchrotron based transmission X-ray microscopy in the study of the clay aggregate structure in aqueous suspensions

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:319

Article

Zbik, Marek S.¹  Frost, Ray L.¹  Song, Yen-Fang² 

[1] Queensland Univ Technol, Sch Phys & Chem Sci, Inorgan Mat Res Program, Brisbane, Qld 4001, Australia

[2] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

关键词: transmission X-ray microscopy (TXM);    scanning electron microscopy (SEM);    synchrotron radiation;    kaolinite;    minerals;    interface segregation;   

DOI  :  10.1016/j.jcis.2007.10.062

来源: Elsevier

【 摘 要 】

This paper reports new application of new transmission X-ray microscopy powered by a synchrotron source for the study of aqueous based clay suspensions. This paper delineates the advantages and limitations of this method. The tested transmission X-ray microscopy (TXM) technique has shown good agreement with the cryo-stage SEM technique. The spacial resolution of this TXM technique is 60 nm and clay particles with diameter below 500 nm are clearly visible and their pseudohexagonal symmetry is recognizable in detail. It is clearly demonstrated the methodology of implementing TXM to study aqueous based clay suspensions that are close to similar to 60 nm tomographic resolution. The technique enables us to study discrete structure of clay suspensions in water and within aggregates. This has never been previously possible. Larger crystals, more compact aggregates and less colloidal fraction present in kaolinite from Georgia has impact on faster settling and gelling in denser suspension than for Birdwood kaolinite in which colloidal particles create gel-like networking in less dense aqueous suspension. (c) 2007 Elsevier Inc. All rights reserved.

【 授权许可】

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