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
      Organic Chemistry
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE