Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 100: Issue 1
Desorption of stearic acid upon surfactant adsorbed montmorillonite
A thermogravimetric study
Authors:
Longfei Lu

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Jingong Cai Tongji University State Key Laboratory of Marine Geology Shanghai 200092 China

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Ray Frost Queensland University of Technology Inorganic Materials Research Program, School of Physical and Chemical Sciences 2 George Street GPO Box 2434 Brisbane QLD 4001 Australia

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Pages:
141–144
Online Publication Date:
25 Jul 2009
Publication Date:
01 Apr 2010
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-009-0169-2
Keywords:
Thermogravimetric analysis; Differential thermogravimetric analysis; Chemisorption; Montmorillonite; Desorption; Stearic acid
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Abstract  

Thermal analysis and differential thermal analysis offers a novel means of studying the desorption of acids such as stearic acid from clay surfaces. Both adsorption and chemisorption can be distinguished through the differences in the temperature of mass losses. Increased adsorption is achievable by adsorbing onto a surfactant adsorbed montmorillonite. Stearic acid sublimes at 179 °C but when adsorbed upon montmorillonite sublimes at 207 and 248 °C. These mass loss steps are ascribed to the desorption of the stearic acid on the external surfaces of the organoclays and from the de-chemisorption from the surfactant held in the interlayer of the montmorillonite.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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