Capillary condensation of associating fluids in slit-like pores: A densityfunctional theory

Adsorption of associating particles interacting via the Lennard-Jones poten tial in slit-like pores is studied using the density functional theory. A m odel of association with one site per particle is considered. Capillary pha se diagrams for three values of the association energy are evaluated. We sh ow that the association shifts the entire diagram toward higher temperature s. The critical average densities of the confined fluid, however, are almos t independent of the association energy. Our results also demonstrate that the association significantly influences the layering transitions. (C) 1999 Academic Press.