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Vermiculite-aliphatic amine interactions at the solid/liquid interface: a thermodynamic approach

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Abstract

Polar n-alkylmonoamines of general formula H3C(CH2) n NH2 (n = 1, 3, 5) interacted with layered silicate vermiculite at the solid/liquid interface. The maximum amount of amine intercalated (N f ) inside the interlamellar space were 0.62, 0.46, and 0.38 mmol g−1, to give the following order of intercalation ethyl → butyl → hexylamines. The layered vermiculite solid was suspended in deionized water and calorimetrically titrated with this series of amines, to give favorable thermodynamic data, such as exothermic enthalpy, negative Gibbs free energy and positive entropy data.

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Acknowledgements

The authors thank to CAPES and CNPq for financial support and fellowships.

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Authors and Affiliations

  1. Departamento de Química, CCEN, Universidade Federal da Paraíba, 58059-900, João Pessoa, Paraíba, Brazil

    Maria G. da Fonseca, Ramon K. S. Almeida, Albaneide F. Wanderley, Ulysses V. S. Ferreira & Luiza N. H. Arakaki

  2. Instituto de Química, Universidade Estadual de Campinas, 13084-971, Campinas, São Paulo, Brazil

    José A. Simoni & Claudio Airoldi

Authors
  1. Maria G. da Fonseca
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  2. Ramon K. S. Almeida
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  3. Albaneide F. Wanderley
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  4. Ulysses V. S. Ferreira
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  5. Luiza N. H. Arakaki
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  6. José A. Simoni
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  7. Claudio Airoldi
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Correspondence to Maria G. da Fonseca.

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da Fonseca, M.G., Almeida, R.K.S., Wanderley, A.F. et al. Vermiculite-aliphatic amine interactions at the solid/liquid interface: a thermodynamic approach. J Therm Anal Calorim 97, 453–457 (2009). https://doi.org/10.1007/s10973-009-0220-3

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  • DOI: https://doi.org/10.1007/s10973-009-0220-3

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