New approach to the formation of polyimide ultrafiltration membranes involving modified polyacrylonitrile

A new approach to the formation of asymmetric ultrafiltration membranes based on insoluble rigid-chain aromatic polyimide (PI) and involving polyacrylonitrile modified by partial cyclization ( m -PAN) has been studied. It has been found that m -PAN exerts a favorable effect on the membrane formation...

Full description

Saved in:
Bibliographic Details
Published inPetroleum chemistry Vol. 52; no. 7; pp. 527 - 532
Main Authors Polotskaya, G. A., Meleshko, T. K., Novoselova, A. V., Gofman, I. V., Polotsky, A. E.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.12.2012
Springer
Subjects
Analysis
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Permeability
Precipitation (Meteorology)
Proteins
permeability to water
asymmetric membranes
thermal stability
polyimide
ultrafiltration
polyacrylonitrile
Online AccessGet full text

Cover

More Information
Summary:A new approach to the formation of asymmetric ultrafiltration membranes based on insoluble rigid-chain aromatic polyimide (PI) and involving polyacrylonitrile modified by partial cyclization ( m -PAN) has been studied. It has been found that m -PAN exerts a favorable effect on the membrane formation and composition: it ( i ) promotes fast precipitation at the stage of wet formation; ( ii ) acts as an imidization catalyst that allows for decreasing temperature at the stage of solid-phase thermal imidization; and ( iii ) it remains as a full-fledged component in the PI/ m -PAN membrane. It was shown that up to 20 wt % m -PAN can be effectively introduced into the membrane composition. The membranes have been calibrated using a model mixture of proteins with different molecular weights. The structure, permeability to water, and thermomechanical properties of the membranes have been studied.
ISSN:0965-5441
1555-6239
DOI:10.1134/S0965544112070110