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Lange T, Charpentier T, Gobeaux F, et al. Partial Transformation of Imogolite by Decylphosphonic Acid Yields an Interface Active Composite Material. Langmuir. 2019;35(11):4068-4076doi: 10.1021/acs.langmuir.8b04242.
Lange, T., Charpentier, T., Gobeaux, F., Charton, S., Testard, F., & Thill, A. (2019). Partial Transformation of Imogolite by Decylphosphonic Acid Yields an Interface Active Composite Material. Langmuir : the ACS journal of surfaces and colloids, 35(11), 4068-4076. https://doi.org/10.1021/acs.langmuir.8b04242
Lange, Tobias, et al. "Partial Transformation of Imogolite by Decylphosphonic Acid Yields an Interface Active Composite Material." Langmuir : the ACS journal of surfaces and colloids vol. 35,11 (2019): 4068-4076. doi: https://doi.org/10.1021/acs.langmuir.8b04242
Lange T, Charpentier T, Gobeaux F, Charton S, Testard F, Thill A. Partial Transformation of Imogolite by Decylphosphonic Acid Yields an Interface Active Composite Material. Langmuir. 2019 Mar 19;35(11):4068-4076. doi: 10.1021/acs.langmuir.8b04242. Epub 2019 Mar 06. PMID: 30793904.
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Langmuir. 2019 Mar 19;35(11):4068-4076. doi: 10.1021/acs.langmuir.8b04242. Epub 2019 Mar 06.

Partial Transformation of Imogolite by Decylphosphonic Acid Yields an Interface Active Composite Material.

Langmuir : the ACS journal of surfaces and colloids

Tobias Lange, Thibault Charpentier, Frédéric Gobeaux, Sophie Charton, Fabienne Testard, Antoine Thill

Affiliations

  1. CEA, DEN, Research Department on Mining and Fuel Recycling Processes, SA2I , F-30207 Bagnols-sur-Cèze , France.
  2. NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay , 91191 Gif-sur-Yvette Cedex , France.

PMID: 30793904 DOI: 10.1021/acs.langmuir.8b04242

Abstract

The phosphonic acid moiety is commonly used as an anchoring group for the surface modification of imogolite. However, the impact of the reaction on its structure has never been clearly analyzed before. We study the reaction of imogolite and decylphosphonic acid by combining infrared spectroscopy, X-ray scattering, scanning electron microscopy, transmission electron microscopy, and solid-state nuclear magnetic resonance spectroscopy. Instead of a surface functionalization, we observe the formation of a lamellar phase interconnected with imogolite bundles. Although we find no evidence for grafted imogolite tubes, we observe the expected dispersion characteristics and stabilization of water in toluene emulsions described in the literature. Based on the surface chemistry of imogolite, we propose an explanation for the observed reactivity and link the structural features of the obtained composite material to its dispersibility in toluene and its observed properties at the toluene-water interface.

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