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Issue 39, 2005
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Gels of zirconium phosphate in organic solvents and their use for the preparation of polymeric nanocomposites

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Abstract

Gels of α-zirconium phosphate (α-ZrP) in water have been prepared by exfoliation of crystalline α-ZrP induced by intercalation–deintercalation of propylamine. Although these gels are X-ray amorphous, their Raman spectra indicate that the α-type layers of the starting material remain essentially unaltered. Replacement of gel water with water miscible organic solvents has allowed the formation of α-ZrP gels in a great variety of solvents, such as alkanols, N,N-dimethylformamide (DMF), 1-methyl-2-pyrrolidone (NMP), acetone, tetrahydrofuran (THF) and even chloroform. Particular attention has been devoted to α-ZrP gels in DMF. On the basis of the surface area of the dry gels, the average thickness of the particles of exfoliated α-ZrP has been estimated between 25 and 80 nm for α-ZrP percentages in the starting gels between 2.5 and 10 wt%, respectively, in agreement with SEM images. α-ZrP gels in THF have been used for the preparation of polystyrene/α-ZrP nanocomposites with filler loadings up to 8 wt%. The presence of exfoliated α-ZrP delays the beginning of thermal decomposition of the polymer by a maximum of 45 °C for 4 wt% filler loading. The state of filler exfoliation has been confirmed by transmission electron microscopy.

Graphical abstract: Gels of zirconium phosphate in organic solvents and their use for the preparation of polymeric nanocomposites

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Publication details

The article was received on 12 May 2005, accepted on 28 Jul 2005 and first published on 23 Aug 2005


Article type: Paper
DOI: 10.1039/B506768E
J. Mater. Chem., 2005,15, 4262-4267

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    Gels of zirconium phosphate in organic solvents and their use for the preparation of polymeric nanocomposites

    M. Casciola, G. Alberti, A. Donnadio, M. Pica, F. Marmottini, A. Bottino and P. Piaggio, J. Mater. Chem., 2005, 15, 4262
    DOI: 10.1039/B506768E

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