Accession Number : ADA309563
Title : Evaluation of Pyrrones as Membranes.
Descriptive Note : Contractor rept.,
Corporate Author : FRANKLIN INST RESEARCH LABS PHILADELPHIA PA
Personal Author(s) : Scott, H. ; Serafin, F. L.
PDF Url : ADA309563
Report Date : SEP 1970
Pagination or Media Count : 38
Abstract : The facile absorption of water by polyimidazopyrrolones (pyrrones) suggested a feasibility study to use films of the polymers as membranes for the purification of water by reverse osmosis. This report describes direct osmosis measurements of water, salt, and urea fluxes through Pyrrone membranes. The data indicate comparable flux values and superior water-to-salt permeabilities of the Pyrrones relative to symmetric cellulose acetate membranes. Coupled with better mechanical strength and chemical resistance, these results suggest that the successful fabrication of asymmetric Pyrrone membranes could lead to substantial improvements over asymmetric cellulose acetate, from which the best reverse osmosis membranes are currently prepared.
Descriptors : *POLYMERS, *MEMBRANES, *IMIDAZOLES, MEASUREMENT, WATER, FLUX(RATE), RESISTANCE, STRENGTH(MECHANICS), REVERSE OSMOSIS, PURIFICATION, ASYMMETRY, FEASIBILITY STUDIES, SYMMETRY, ABSORPTION, UREA, CELLULOSE ACETATES, DESALINATION.
Subject Categories : Polymer Chemistry
Industrial Chemistry and Chemical Processing
Electricity and Magnetism
Distribution Statement : APPROVED FOR PUBLIC RELEASE