Petroleum Chemistry, Vol.53, No.8, 564-566, 2013
Complexation of ammonia and water with cellulose acetate upon transmembrane transport
The mechanism of transmembrane transport of ammonia and water through the cellulose acetate membrane has been determined. The data obtained by FTIR spectroscopy confirm the suggested mechanism of penetrant interaction with the polymeric matrix and provide evidence that complexation by hydrogen bonding involves donor groups, such as C=O, C-O-C, and OH. The sorption of water and ammonia is localized in character and occurs on active sites of the polymeric matrix via the formation of hydrogen bonds with both the hydroxy groups and the ester oxygen atoms of cellulose acetate.