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Influence of Molecular Structure of Quaternary Phosphonium Salts on Thai Bentonite Intercalation

Published online by Cambridge University Press:  01 January 2024

Chureerat Prahsarn ,
Nanjaporn Roungpaisan ,
Nattaphop Suwannamek ,
Wattana Klinsukhon ,
Hiromichi Hayashi ,
Kazunori Kawasaki  and
Takeo Ebina
Chureerat Prahsarn*
Affiliation:
National Metal and Materials Technology Center, 114 Paholyothin Rd., Klong 1, 12120, Klong Laung, Pathumthani, Thailand
Nanjaporn Roungpaisan
Affiliation:
National Metal and Materials Technology Center, 114 Paholyothin Rd., Klong 1, 12120, Klong Laung, Pathumthani, Thailand
Nattaphop Suwannamek
Affiliation:
National Metal and Materials Technology Center, 114 Paholyothin Rd., Klong 1, 12120, Klong Laung, Pathumthani, Thailand
Wattana Klinsukhon
Affiliation:
National Metal and Materials Technology Center, 114 Paholyothin Rd., Klong 1, 12120, Klong Laung, Pathumthani, Thailand
Hiromichi Hayashi
Affiliation:
Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology, 4-2-1 Nigatake, Miyagino-ku, 983-8551, Sendai, Japan
Kazunori Kawasaki
Affiliation:
Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology, 4-2-1 Nigatake, Miyagino-ku, 983-8551, Sendai, Japan
Takeo Ebina
Affiliation:
Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology, 4-2-1 Nigatake, Miyagino-ku, 983-8551, Sendai, Japan
*
*E-mail address of corresponding author: [email protected]
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Abstract

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A comprehensive study of the intercalation of organo-phosphonium salts into Thai bentonite (Mt) was conducted to investigate the influence of the molecular structures of organic moieties, including chain types (alkyl vs. aryl), chain length, and structural symmetry, on their intercalation. A series of quaternary phosphonium salts with systematically varied molecular structures (tetraphenyl phosphonium, TPP-Br; tetrabutyl phosphonium, TBP-Br; tetraoctyl phosphonium, TOP-Br; methyl triphenyl phosphonium, MTPP-Br; and butyl triphenyl phosphonium, BTPP-Br) was intercalated into Mt via an ion-exchange reaction. From thermogravimetric analysis results, tetrabutyl phosphonium-modified Mt (TBP) with shorter alkyl chain length began to decompose at a slightly lower temperature (263 vs. 351°C), yet showed comparable thermal stability (i.e. maximum decomposition temperature) at 470°C, compared to tetraoctyl phosphonium-modified Mt (TOP). Aryl phosphonium-modified Mt (TPP) showed a higher thermal decomposition temperature (576 vs. 470°C) than those of alkyl phosphonium-modified Mts (TBP and TOP). Introducing short alkyl chains into the aryl phosphonium moiety (MTPP, BTPP) caused a slight decrease in thermal decomposition temperature, but an increase in cation loadings of their modified Mts (71 and 73%, respectively). X-ray diffraction analysis showed that the flexibility of alkyl chains in TBP yielded smaller increases in basal spacing, i.e. lower degree of intercalation, compared to the rigid aryl structure in TPP. Increasing chain length resulted in greater basal spacing in alkyl phosphonium-modified Mts (1.67 nm. in TBP vs. 2.46 nm. in TOP). Such an effect, however, was less significant in aryl phosphonium-modified Mt.

Keywords

IntercalationMolecular StructureMontmorilloniteOrgano-clayPhosphonium Salts
Type
Article
Information
Clays and Clay Minerals , Volume 62 , Issue 1 , February 2014 , pp. 13 - 19
Copyright
Copyright © Clay Minerals Society 2014

References

Avalos, F. Ortiz, J.C. Zitzumbo, R. Lopez-Manchado, M.A. Verdejo, R. and Arroyo, M., 2009 Phosphonium salt intercalated montmorillonites Applied Clay Science 43 27–32.CrossRefGoogle Scholar
Calderon, J.U. Lennox, B. and Kamal, M.R., 2008 Thermally stable phosphonium montmorillonite organo-clay Applied Clay Science 40 90–98.CrossRefGoogle Scholar
Feng, J. Hao, J. Du, J. and Yang, R., 2012 Effects of organoclay modifiers on the flammability, thermal and mechanical properties of polycarbonate nanocomposites filled with a phosphate and organoclays Polymer Degradation and Stability 97 108–117.CrossRefGoogle Scholar
Garcia-Lopez, D. Fernandez, J. F. Merino, J. C. and Pastor, J. M., 2013 Influence of organic modifier characteristic on the mechanical properties of polyamide6/organosepiolite nanocomposites Composites: Part B 45 459–465.CrossRefGoogle Scholar
Hedley, C.B. Yuan, G. and Theng, B.K.G., 2007 Thermal analysis of montmorillonites modified with quaternary phosphonium and ammonium surfactants Applied Clay Science 35 180–188.CrossRefGoogle Scholar
Kawasaki, K. Ebina, T. Mizukami, F. Tsuda, H. and Motegi, K., 2010 Development of flexible organo-saponite films and their transparency at high temperature Applied Clay Science 48 111–116.CrossRefGoogle Scholar
Leszczynska, A. Njuguna, J. Pielichowski, K. and Banerjee, J.R., 2007 Polymer/montmorillonite nanocomposites with improved thermal properties I. Factors influencing thermal stability and mechanisms of thermal stability improvement Thermochimica Acta 453 75–96.CrossRefGoogle Scholar
Leszczynska, A. Njuguna, J. Pielichowski, K. and Banerjee, J.R., 2007 Polymer/montmorillonite nanocomposites with improved thermal properties II. Thermal stability of montmorillonite nanocomposites based on different polymeric matrixes Thermochimica 454 1–22.CrossRefGoogle Scholar
Paiva, L.B. Morales, A.R. and Diaz, F.R.V., 2008 Organoclay: Properties, preparation and applications Applied Clay Science 42 8–24.CrossRefGoogle Scholar
Patel, H.A. Somani, R.S. Bajaj, H.C. and Jasra, R.V., 2007 Preparation and characterization of phosphonium montmorillonite with enhanced thermal stability Applied Clay Science 35 194–200.CrossRefGoogle Scholar
Suin, S. Maiti, S. Shrivastava, N.K. and Khatua, B.B., 2014 Mechanically improved and optically transparent polycarbonate/clay nanocomposites using phosphonium modified organoclay Materials and Design 54 553–563.CrossRefGoogle Scholar
Thuc, C.N.H. Grillet, A.C. Reinert, L. and Ohashi, F., 2010 Separation and purification of montmorillonite and polyethylene oxide modified montmorillonite from Vietnamese bentonites Applied Clay Science 49 229–238.CrossRefGoogle Scholar
Xie, W. Xie, R. 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.CrossRefGoogle Scholar