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Thermal Characterization of Surfactant-Modified Montmorillonites

Published online by Cambridge University Press:  01 January 2024

Hongping He ,
Zhe Ding ,
Jianxi Zhu ,
Pen Yuan ,
Yunfei Xi ,
Dan Yang  and
Ray L. Frost
Hongping He*
Affiliation:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou 510640, China Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, PO Box 2434 GPO, Brisbane, QLD 4001, Australia
Zhe Ding
Affiliation:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou 510640, China Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, PO Box 2434 GPO, Brisbane, QLD 4001, Australia
Jianxi Zhu
Affiliation:
Department of Environment Science, Xixi Campus, Zhejiang University, 148 Tianmushan Street, Hangzhou, Zhejiang, China 310028
Pen Yuan
Affiliation:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou 510640, China
Yunfei Xi
Affiliation:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou 510640, China
Dan Yang
Affiliation:
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Wushan, Guangzhou 510640, China
Ray L. Frost
Affiliation:
Inorganic Materials Research Program, School of Physical and Chemical Sciences, Queensland University of Technology, PO Box 2434 GPO, Brisbane, QLD 4001, Australia
*
*E-mail address of corresponding author: [email protected]
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Abstract

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The thermal stability of surfactant-modified clays plays a key role in the synthesis and processing of organoclay-based nanocomposites. Differential thermal analysis (DTA), thermogravimetric measurement and differential scanning calorimetry (DSC) were used in this study to characterize the thermal stability of hexadecyltrimethylammonium bromide-modified montmorillonites prepared at different surfactant concentrations. Analysis by DSC shows that the molecular environment of the surfactant within the montmorillonite galleries is different from that in the bulk state. The endothermic peak at 70–100°C in the DTA curves of the modified montmorillonites is attributed to both the surfactant phase transformation and the loss of free and interlayer water. With an increase of surfactant-packing density, the amount of water residing in the modified montmorillonite decreases gradually, reflecting the improvement of the hydrophobic property for the organoclay. However, the increase in the surfactant packing density within the galleries leads to a decrease in the thermal stability of the organoclays.

With an increase of initial surfactant concentration for the preparation of organoclays, the surfactant- packing density increases gradually to a ‘saturated’ state. It was found that the cationic surfactant was introduced into the montmorillonite interlayer not only by cation exchange but also by physical adsorption.

Keywords

DSCDTASurfactant-modified MontmorilloniteThermal StabilityTG
Type
Research Article
Information
Clays and Clay Minerals , Volume 53 , Issue 3 , June 2005 , pp. 287 - 293
Copyright
Copyright © The Clay Minerals Society 2005

References

Adebajo, M.O. Frost, R.L. Kloprogge, J.T. and Carmody, O., (2003) Porous materials for oil spill cleanup: a review of synthesis and absorbing properties Journal of Porous Materials 10 159–170 10.1023/A:1027484117065.Google Scholar
Endoh, K. and Suga, H., (1999) Phase behavior of CTAB: o-iodophenol binary system Thermochimica Acta 334 89–96 10.1016/S0040-6031(99)00116-1.Google Scholar
Greene-Kelly, R., (1955) Dehydration of montmorillonite minerals Mineralogical Magazine 30 604–615 10.1180/minmag.1955.030.228.06.Google Scholar
He, H.P. Guo, J.G. Zhu, J.X. and Hu, C., (2003) 29Si and 27A1 MAS NMR study of the thermal transformations of kaolinite from North China Clay Minerals 38 551–558 10.1180/0009855033840114.Google Scholar
He, H.P. Frost, R.L. and Zhu, J.X., (2004) Infrared study of HDTMA+ intercalated montmorillonite Spectrochimica Acta Part A 60 2853–2859 10.1016/S1386-1425(03)00337-8.Google Scholar
He, H.P. Frost, R.L. Deng, F. Zhu, J.X. Weng, X.Y. and Yuan, P., (2004) Conformation of surfactant molecules in the interlayer of montmorillonite studied by 13C MAS NMR Clays and Clay Minerals 52 350–356 10.1346/CCMN.2004.0520310.Google Scholar
He, H.P. Frost, R.L. Xi, Y.F. and Zhu, J.X., (2004) A Raman spectroscopic study of organo-montmorillonites Journal of Raman Spectroscopy 35 316–323 10.1002/jrs.1165.Google Scholar
Klapyta, Z. Fujita, T. and Iyi, N., (2001) Adsorption of dodecyl- and octadecyltrimethylammonium ions on a smectite and synthetic micas Applied Clay Science 19 5–10 10.1016/S0169-1317(01)00059-X.Google Scholar
Lagaly, G., (1981) Characterization of clays by organic compounds Clay Minerals 16 1–21 10.1180/claymin.1981.016.1.01.Google Scholar
Li, Y.Q. and Ishida, H., (2002) A differential scanning calorimetry study of the assembly of hexadecylamine molecules in the nanoscale confined space of silicate galleries Chemistry of Materials 14 1398–1404 10.1021/cm0103747.Google Scholar
Li, Y.Q. and Ishida, H., (2003) Concentration-dependent conformation of alkyl tail in the nanoconfined space: Hexadecylamine in the silicate galleries Langmuir 19 2479–2484 10.1021/la026481c.Google Scholar
Ray, S.S. and Okamoto, M., (2003) Polymer/layered silicate nanocomposites: a review from preparation to processing Progress in Polymer Science 28 1539–1641 10.1016/j.progpolymsci.2003.08.002.Google Scholar
Tamura, K. and Nakazawa, H., (1996) Intercalation of n-alkyltrimethylammonium into swelling fluoro-mica Clays and Clay Minerals 44 501–505 10.1346/CCMN.1996.0440408.Google Scholar
Vaia, R.A. Teukolsky, R.K. and Giannelis, E.P., (1994) Interlayer structure and molecular environment of alkylammonium layered silicates Chemistry of Materials 6 1017–1022 10.1021/cm00043a025.Google Scholar
Xie, W. Gao, Z.M. Liu, K.L. Pan, W.P. Vaia, R. Hunter, D. and Singh, A., (2001) Thermal characterization of organically modified montmorillonite Thermochimica Acta 339 367–368.Google Scholar
Xie, W. Gao, Z.M. Pan, W.P. Hunter, D. Singh, A. and Vaia, R., (2001) Thermal degradation chemistry of alkyl quaternary ammonium montmorillonite Chemistry of Materials 13 2979–2990 10.1021/cm010305s.Google Scholar
Xie, W. Xie, R.C. Pan, W.P. Hunter, D. Koene, B. Tan, L.S. and Vaia, R., (2002) Thermal stability of quaternary phosphonium modified montmorillonites Chemistry of Materials 14 4837–4845 10.1021/cm020705v.Google Scholar
Yariv, S., (2004) The role of charcoal on DTA curves of organo-clay complexes: an overview Applied Clay Science 24 225–236 10.1016/j.clay.2003.04.002.CrossRefGoogle Scholar
Yui, T. Yoshida, H. Tachibana, H. Tryk, D.A. and Inoue, H., (2002) Intercalation of polyfluorinated surfactants into clay minerals and the characterization of the hybrid compounds Langmuir 18 891–896 10.1021/la011297x.Google Scholar
Zhu, J.X. He, H.P. Guo, J.G. Yang, D. and Xie, X.D., (2003) Arrangement models of alkylammonium cations in the interlayer of HDTMA+ pillared montmorillonite Chinese Science Bulletin 48 368–372.Google Scholar