Thermogravimetric analysis of tetradecyltrimethylammonium bromide-modified beidellites

Lim, Yet Hong, Zsirka, Balázs, Horváth, Erzsébet, Kristóf, Janos, Couperthwaite, Sara J., Frost, Ray L., Ayoko, Godwin A., & Xi, Yunfei (2015) Thermogravimetric analysis of tetradecyltrimethylammonium bromide-modified beidellites. Journal of Thermal Analysis and Calorimetry, 120(1), pp. 67-71.

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Abstract

The surfaces of natural beidellite clay were modified with cationic surfactant, tetradecyltrimethylammonium bromide, at different concentrations. The organo-beidellites were analysed using thermogravimetric analysis which shows four thermal oxidation/decomposition steps. The first step of mass loss is observed from room temperature to 130 °C due to the dehydration of adsorbed water. The second step of mass loss between 130 and 400 °C is attributed to the oxidation step of the intercalated organic surfactant with the formation of charcoal. The third mass loss happens between 400 and 500 °C which is assigned to the loss of hydroxyl groups on the edge of clays and the further oxidation step of charcoal. The fourth step is ascribed to the loss of structural OH units as well as the final oxidation/decomposition step of charcoal which takes place between 500 and 700 °C. Thermogravimetric analysis has proven to be a useful tool for estimating loaded surfactant amount.

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ID Code: 83756
Item Type: Journal Article
Refereed: Yes
Keywords: Beidellite, Organo-clay, Tetradecyltrimethylammonium bromide, Thermogravimetric analysis
DOI: 10.1007/s10973-015-4413-7
ISSN: 1588-2926
Divisions: Current > QUT Faculties and Divisions > Chancellery
Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Springer
Copyright Statement: Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Deposited On: 27 Apr 2015 01:27
Last Modified: 12 May 2016 02:09

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