CARDOSO, Mirtys Allamana Ferreira.; FERREIRA, Heber Sivini.; FERREIRA, Heber Carlos.; NEVES, Gelmires Araújo.
Resumo:
The organophilic clays are prepared from bentonite clay treated in aqueous way with ionic surfactants, which
are incorporated in the interlayer of clay mineral surface, covering the organic layer, so that the naturally
hydrophilic clay becomes hydrophobic. The variables of process are of fundamental importance for the
production of organophilic clays, variables such as speed of agitation, temperature and time of cure,
influencing directly in plastic and apparent viscosities of the dispersions, which together with variables of the
organofilization that are time and temperature of cure of organofilization has direct influence on the efficiency
of the organofilization. This work proposes a study of these variables, using the Brasgel PA and Cloisite Na +
bentonite clays treated with the ionic surfactants Praepagem HY and Praepagem WB. Were measured
plastic viscosity and apparent of dispersion and the organophilic clays obtained were characterized by X-ray
diffraction and then made a correlation between the results of intercalation and the variables involved in the
processes. It was observed that both the variables involved in the process of dispersion of clay and in
organofilization, in terms of characterization, have no influence on intensity and in the position of the peak
displacement, and has influence on the rheological properties.