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Macrovoids suppression in polyetherimide (Pei) hollow fibre membranes by optimizing the air gap

Jamil, A. and Ching, O.P. and Shariff, A.M. (2016) Macrovoids suppression in polyetherimide (Pei) hollow fibre membranes by optimizing the air gap. International Journal of Applied Engineering Research, 11 (19). pp. 9684-9688.

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Abstract

Asymmetric polyetherimide (PEI) hollow fibre membranes have been prepared by dry-wet phase inversion method in which N-methyl-2-pyrrolidone (NMP) was used as solvent whereas water was used as both internal and external solvent. The polymer dope solution contained 25 wt. of PEI and was spun at different air gaps at ambient conditions. The air gap effect was analyzed based on the surface morphology of the membranes using scanning electron microscopy (SEM). At longer air gaps, due to the dominant dry processes, finger-like pores extended to the outer skin layer and larger macrovoids appeared under the skin layer which may result in poor separation performance. The wet process presided as air gap was reduced to zero, and the instant solidification created macrovoids under the outer skin layer. At 15 and 20 cm air gaps, optimum results were obtained with minimum macrovoids and uniform finger-like pores under the thin skin layer. © Research India Publications.

Item Type:Article
Impact Factor:cited By 1
ID Code:25304
Deposited By: Ms Sharifah Fahimah Saiyed Yeop
Deposited On:27 Aug 2021 12:57
Last Modified:27 Aug 2021 12:57

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