Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 63: Issue 1
Thermoanalytical Investigation of Formamide Intercalated Kaolinites Under Quasi-isothermal Conditions
Authors:
J. Kristóf University of Veszprém Department of Analytical Chemistry H-8201 Veszprém P.O. Box 158 Hungary H-8201 Veszprém P.O. Box 158 Hungary

Search for other papers by J. Kristóf in
Current site
Google Scholar
PubMed Close
,
E. Horváth Hungarian Academy of Sciences Research Group for Analytical Chemistry H-8201 Veszprém P.O. Box 158 Hungary H-8201 Veszprém P.O. Box 158 Hungary

Search for other papers by E. Horváth in
Current site
Google Scholar
PubMed Close
,
R. Frost Queensland University of Technology Centre for Instrumental and Developmental Chemistry 2 George Street G.P.O. Box 2434 Brisbane Q 4001 Australia 2 George Street G.P.O. Box 2434 Brisbane Q 4001 Australia

Search for other papers by R. Frost in
Current site
Google Scholar
PubMed Close
, and
J. Kloprogge Queensland University of Technology Centre for Instrumental and Developmental Chemistry 2 George Street G.P.O. Box 2434 Brisbane Q 4001 Australia 2 George Street G.P.O. Box 2434 Brisbane Q 4001 Australia

Search for other papers by J. Kloprogge in
Current site
Google Scholar
PubMed Close
Pages:
279–289
Online Publication Date:
02 Nov 2004
Publication Date:
25 Jan 2001
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1010117326869
Keywords:
CRTA; formamide; intercalation; kaolinite; quasi-isothermal thermogravimetry
Restricted access

Abstract  

The thermal behaviour of fully and partially expanded kaolinites intercalated with formamide has been investigated in nitrogen atmosphere under quasi-isothermal heating conditions at a constant, pre-set decomposition rate of 0.20 mg min–1 . With this technique it is possible to distinguish between loosely bonded (surface bonded) and strongly bonded (intercalated) formamide. Loosely bonded formamide is liberated in an equilibrium reaction under quasi-isothermal conditions at 118°C, while the strongly bonded (intercalated) portion is lost in an equilibrium, but non-isothermal process between 130 and 200°C. The presence of water in the intercalation solution can influence the amount of adsorbed formamide, but has no effect on the amount of the intercalated reagent. When the kaolinite is fully expanded, the amount of formamide hydrogen bonded to the inner surface of the mineral is 0.25 mol formamide/mol inner surface OH group. While the amount of surface bonded formamide is decreasing with time, no change can be observed in the amount of the intercalated reagent. With this technique the mass loss stages belonging to adsorbed and intercalated formamide can be resolved thereby providing a complex containing only one type of bonded (intercalated) formamide.

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

To see the editorial board, please visit the website of Springer Nature.

Manuscript Submission: HERE

For subscription options, please visit the website of Springer Nature.

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)

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
Nov 2024 1 0 0
Dec 2024 0 0 0
Jan 2025 4 0 0
Feb 2025 14 0 0
Mar 2025 6 0 0
Apr 2025 6 0 0
May 2025 1 0 0