engleski

Effect of Hydrolysis on porosity of cellulose acetate reverse osmosis membranes

The alkaline hydrolysis of asymmetric cellulose acetate membranes was investigated. The hydrolysis was performed in reverse osmosis equipment. The changes of cellulose triacetate and cellulose diacetate membrane performances caused by hydrolysis of the membrane material were measured, and the data were analyzed in terms of pore size distributions and effective number of pores in the upper membrane layer before and after hydrolysis. The resulting membranes rejection factors decrease and the permeation rates increase were caused by closing of a part of the smallest “network” membrane pores and by increasing the size of the other pores.

asymmetric membranes; cellulose acetates; hydrolysis; pore size distribution; membrane performance

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