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Permeation of water as a tool for characterizing the effect of solvent, film th...
Valente, Artur J. M.; Polishchuk, Alexandre Ya.; Burrows, Hugh D.; Lobo, Victor M. M.Cellulose acetate membranes have been used in many applications; of particular interest are reverse osmosis systems, and as a neutral matrix for incorporation of different polymers (e.g., conducting polymers), inorganic ions (e.g., lanthanides) and organic (e.g., pharmaceutical) compounds. The properties of the new polymers derived from cellulose acetate or blends depend on those of cellulose acetate. This work...
Combined sorption/transport of sodium dodecyl sulfate and hydrochloric acid in ...
Valente, Artur J. M.; Burrows, Hugh D.; Polishchuk, Alexandre Ya.; Miguel, Maria G.; Lobo, Victor M. M.The transport of hydrochloric acid (0.001-0.1 M) and sodium dodecyl sulfate (0.001-0.1 M) has been measured through a membrane consisting of a blend of cellulose acetate butyrate and cellulose acetate hydrogen phthalate. The cellulose derivative blend is suggested to suffer an alteration in the degree of hydrophobicity when in equilibrium with sodium dodecyl sulfate (SDS) through hemimicelle formation. An incre...
Transport Properties of Concentrated Aqueous Sodium Dodecyl Sulfate Solutions i...
Valente, Artur J. M.; Polishchuk, Alexandre Ya.; Lobo, Victor M. M.; Burrows, Hugh D.Polymer membranes with differing degrees of hydrophilicity were prepared from mixtures of cellulose acetate butyrate and cellulose acetate hydrogen phthalate. The degree of hydrophilicity was determined from measurements of water uptake and the apparent water diffusion coefficient. The transport properties of sodium dodecyl sulfate through these membranes were studied by measuring permeability using the time-la...
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