The role of formamide in the preparation of cellulose acetate membranes by the phase inversion process

1969 ◽  
Vol 230 (2) ◽  
pp. 341-346 ◽  
Author(s):  
Robert E. Kesting ◽  
Andrew Menefee
Keyword(s):  
Cellulose Acetate ◽  
Phase Inversion ◽  
Inversion Process ◽  
Cellulose Acetate Membranes ◽  
Phase Inversion Process

scholarly journals ASYMMETRIC CELLULOSE ACETATE MEMBRANES USED IN SEPARATION APPLICATIONS

2021 ◽  
Vol 185 (1) ◽  
pp. 70-76
Author(s):  
Gabriela CIOBANU ◽  
Lidia FAVIER ◽  
Maria HARJA
Keyword(s):  
Cellulose Acetate ◽  
Phase Inversion ◽  
Preparation Method ◽  
Nacl Solution ◽  
Inversion Process ◽  
Asymmetric Membranes ◽  
Membrane Performance ◽  
Cellulose Acetate Membranes ◽  
Phase Inversion Process ◽  
Good Retention

This work focused on the use of cellulose acetate polymer for the preparation of porous asymmetric membranes using a phase inversion process. These membranes were characterised by scanning electron microscopy, a bubble-point method and sorption measurements. The preparation method used induced membrane anisotropy. The capacity of the membranes in the removal of electrolyte (NaCl) from aqueous solution was investigated. A good retention of 58.6% and a high flux rate of 8.9 × 10–4 m/s using NaCl solution of 200 mg/L concentration were obtained by cellulose acetate membranes prepared with water as non-solvent. The results showed that the membrane performance was affected by the membrane structure, which was determined by the conditions of membrane preparation.

Microporous Membranes from an Insoluble Polyimide

1995 ◽  
Vol 60 (10) ◽  
pp. 1741-1746
Author(s):  
Jan Schauer ◽  
Miroslav Marek
Keyword(s):  
Acetic Anhydride ◽  
Phase Inversion ◽  
Amic Acid ◽  
Microporous Membranes ◽  
Inversion Process ◽  
Phase Inversion Process ◽  
Ultrafiltration Process

Poly(amic acid) prepared from 3,3',4,4'-benzophenonetetracarboxylic dianhydride and bis(4-aminophenyl) ether was used for preparation of microporous membranes by the phase inversion process. Membranes coagulated in acetic anhydride were brittle but usable for ultrafiltration. Coagulation of the poly(amic acid) in water or lower alcohols and subsequent thermal cyclocondensation led to extremely brittle polyimides, which limits their use for ultrafiltration process.

A Three-Step Model for Submicron W/O Emulsion Formation in a Transitional-Phase Inversion Process

2015 ◽  
Vol 37 (8) ◽  
pp. 1186-1191 ◽  
Author(s):  
Xiaolong Wang ◽  
Yonghong Liu ◽  
Hang Dong ◽  
Qiang Sun ◽  
Yang Shen ◽  
...  
Keyword(s):  
Phase Inversion ◽  
Inversion Process ◽  
Step Model ◽  
Transitional Phase ◽  
Phase Inversion Process

Design and Application of a Low-Molecular-Mass Cut-Off Poly (Ether Sulphone) Membrane

1992 ◽  
Vol 25 (10) ◽  
pp. 351-362 ◽  
Author(s):  
E. P. Jacobs ◽  
N. K. H. Strohwald ◽  
D. Koen ◽  
R. D. Sanderson
Keyword(s):  
Molecular Mass ◽  
Surface Waters ◽  
Phase Inversion ◽  
Sugar Industry ◽  
Polymer Science ◽  
Inversion Process ◽  
Commercial Scale ◽  
Manufacturing Methods ◽  
The University ◽  
Phase Inversion Process

Low-molecular-mass cut-off tubular ultrafiltration membranes have been developed at the Institute for Polymer Science at the University of Stellenbosch; the compositions and the manufacturing methods are such that these membranes can be made commercially on an industrial scale. Three membranes were designed which gave performances comparable to those of other commercial membranes. The development work comprised detailed studies of the mechanisms of the phase-inversion process, of the solvents and non-solvents used in the gelation step, and of the factors influencing the actual physical production of the membranes. The technology of producing the membranes was successfully transferred to the commercial-scale operation and the membranes have been shown to be economically productive and to show promise in removing colour contamination from natural surface waters and from process streams in the sugar industry.

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