A thermoanalytical assessment of an organoclay
Park, Yuri, Ayoko, Godwin A., Kristof, Janos, Horvath, Erzsebet, & Frost, Ray L. (2012) A thermoanalytical assessment of an organoclay. Journal of Thermal Analysis and Calorimetry, 107(3), pp. 1137-1142.
High resolution thermogravimetric analysis (TGA) has attracted much attention in the synthesis of organoclays and its applications. In this study, organoclays were synthesised through ion exchange of a single cationic surfactant for sodium ions, and characterised by methods including X-ray diffraction (XRD), and thermogravimetric analysis (TGA). The changes of surface properties in montmorillonite and organoclays intercalated with surfactant were determined using XRD through the changes in the basal spacing. The thermogravimetric analysis (TGA) was applied in this study to investigate more information of the configuration and structural changes in the organoclays with thermal decomposition. There are four different decompositions steps in differential thermogravimetric (DTG) curves. The obtained TG steps are relevant to the arrangement of the surfactant molecules intercalated in montmorillonite and the thermal analysis indicates the thermal stability of surfactant modified clays. This investigation provides new insights into the properties of organoclays and is important in the synthesis and processing of organoclays for environmental applications.
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|Item Type:||Journal Article|
|Keywords:||organoclay, montmorillonites, hexadecyltrimethylammonium bromide, cationic surfactant, thermal analysis|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2011 Akadémiai Kiadó, Budapest, Hungary|
|Copyright Statement:||Include the following copyright statement: The original publication is available at SpringerLink http://www.springerlink.com|
|Deposited On:||21 Feb 2012 07:47|
|Last Modified:||18 Apr 2013 16:33|
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