The exfoliation of zirconium phosphate with a layered structure pounds have been successfully exfoliated in an aqueous meof the g-type is of interest from both a fundamental and a technodium when some short-chain alkylamines are intercalated logical point of view. However, until now, the results reported in (2). The colloidal dispersions of layered compounds have the literature have not been as good as those reported for a-zircomany potential uses: preparation of high-surface-area catanium phosphate. It has been found that a very good exfoliation of lysts (2), self-assembled layered structures (3), preparation g-zirconium phosphate with the formation of very stable colloidal of pillared porous compounds by intercalation of large catdispersions can be obtained at temperatures higher than 55ЊC and ionic species such as Keggin ions (4), preparation of selffor percentages of acetone in the range 35-80% in volume. The consistent films or materials covered with very thin pellicules exfoliation was attributed to the formation of an expanded acetone intercalated phase in which the interlayer hydrogen bonds origi-of these compounds (5), and as protonic conductors (6).
nally present in the g-ZrPO 4 rO 2 P(OH) 2 r2H 2 O are broken. By Due to the renewed interest in g-metal (IV) phosphates filtration of the colloidal dispersions, very compact and flexible after the elucidation of their layered structure (7, 8) and self-consistent films can be obtained. ᭧ 1997 Academic Press the preparation of many g-inorgano-organic derivatives (9-Key Words: g-zirconium phosphate; exfoliation of g-zirconium 16), it was of interest to examine the possibility of preparing phosphate; films of g-zirconium phosphate; colloidal dispersion. colloidal dispersions of g-zirconium phosphate, at present formulated as g-ZrPO 4 rO 2 P(OH) 2 r2H 2 O. Previous attempts to obtain exfoliation by the intercalation of short-