Biodegradable blend membranes of poly (butylene succinate)/cellulose acetate/dextran: Preparation, characterization and performance

Polysulfone (PSf) membrane is catogorized as hydrophobic membrane that easily fouled during membrane operation process. The presence of second hydrophilic polymer which added into membrane casting solutions plays a crucial role in adjusting the membrane properties. This hydrophilic polymer was employed in hydrophobic polymer membranes in order to improve hydrophilicity and performance as well as formed antifouling ultrafiltration (UF) membranes. In this study, a hydrophilic polymer, cellulose acetate phthalate (CAP) was added into polysulfone (PSf) membrane casting solutions by blending technique to produce PSf/CAP blend membranes. Flat sheet asymmetric PSf/CAP blend membranes were prepared by wet phase inversion method. The results revealed that an increase in CAP increased the hydrophilicity properties of PSf/CAP blend membranes compared to pure PSf membrane. The significant changes in size and numbers of microvoids and macrovoids in the morphological structures of PSf/CAP blend membranes were due to CAP promote the instantaneous liquid-liquid demixing during phase inversion process.

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Influence of glycol additives on the structure and performance of cellulose acetate/zinc oxide blend membranes

Desalination ◽

10.1016/j.desal.2010.11.027 ◽

2011 ◽

Vol 270 (1-3) ◽

pp. 98-104 ◽

Cited By ~ 49

Author(s):

Muddassir Ali ◽

Muhammad Zafar ◽

Tahir Jamil ◽

Muhammad Taqi Zahid Butt

Keyword(s):

Zinc Oxide ◽

Cellulose Acetate ◽

Blend Membranes ◽

And Performance

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The Effects of Evaporation Time on Morphological Structure of Polysulfone/Cellulose Acetate Phthalate/Polyvinylpyrrolidone (PSf/CAP/PVP) Blend Membranes

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.695.77 ◽

2014 ◽

Vol 695 ◽

pp. 77-80 ◽

Cited By ~ 1

Author(s):

Asmadi Ali ◽

Rosli Mohd Yunus ◽

Mohamad Awang ◽

Ramli Mat

Keyword(s):

Cellulose Acetate ◽

Morphological Structure ◽

Cellulose Acetate Phthalate ◽

Evaporation Time ◽

Membrane Morphology ◽

Membrane Fabrication ◽

Time Period ◽

Blend Membranes ◽

Fabrication Parameter ◽

And Performance

Evaporation time is one of the important membrane fabrication parameter that can be manipulated in order to produce the desired membrane morphology in ultrafiltration (UF) separation process. The morphology of UF membrane has a significant effect on structural properties and performance of UF membrane. In this study, flat sheet asymmetric polysulfone/cellulose acetate phthalate/polyvinylpyrrolidone (PSf/CAP/PVP) blend membranes were prepared at different evaporation time in the range of 0 to 20 s to investigate its effect on the morphological structures of the blend membranes. The morphological structure of these blend membranes were characterized by using Scanning Electron Microscopy (SEM). The results showed that in the absence of evaporation time, the morphology of blend membrane consits of open finger-like structure and microvoids. Introduction of evaporation time period between 5 to 10 s, produced spongy blend membranes with less finger-like structure. Further increment of evaporation time between 15 to 20s, formed incomplete dense structure with small microvoids PSf/CAP/PVP blend membranes.

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