Acrylonitrile-maleic anhydride copolymer membrane (I): Effects of casting conditions

Citation
Yx. Pei et al., Acrylonitrile-maleic anhydride copolymer membrane (I): Effects of casting conditions, POLYM ADV T, 11(5), 2000, pp. 262-267
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMERS FOR ADVANCED TECHNOLOGIES
ISSN journal
1042-7147 → ACNP
Volume
11
Issue
5
Year of publication
2000
Pages
262 - 267
Database
ISI
SICI code
1042-7147(200005)11:5<262:AACM(E>2.0.ZU;2-S
Abstract
The effects of casting conditions, including casting solution (composition and temperature) and coagulation conditions (pre-evaporation time, temperat ure and concentration of coagulation bath) on the structure and performance of acrylonitrile-maleic anhydride copolymer membrane have been investigate d. The results showed that the water flux decreased gradually while the rej ection of bovine serum albumin (BSA) decreased as concentration of copolyme r increased. When the total solid concentration was kept unchanged, the wat er flux increased with additive polyvinylpyrrolidone (PVP) the rejection di d not decrease until the ratio of PVP/copolymer was 60%. When the content o f copolymer in the casting solution was kept constant, the water flux decre ased rapidly while the rejection increased a little (compared with the case of no additive) as the ratio of PVP/copolymer increased. As to the tempera ture df casting solution, the water flux had a maximum at 45 degrees C and the rejection had a maximum and a minimum at 45 and 55 degrees C, respectiv ely. The water flux had a maximum value when the pre-evaporation time was 4 0sec. The rejection of BSA was almost unchanged when the preevaporation tim e was less than 40sec. and then decreased and reached a minimum value at 60 sec. As the temperature of coagulation bath increased, the water flux reach ed a maximum at 35 degrees C while the rejection increased uniformly. With increasing the concentration of DMSO in the coagulation bath, the water flu x decreased gradually and got to a minimum at 50wt% as the concentration of dimethylsulfoxide in the coagulation bath increased, but no apparent effec t on the rejection was observed. Copyright (C) 2000 John Wiley & Sons, Ltd.