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Minimizing morphological defects of PEI hollow fibre membrane by optimizing the dope viscosity

Oh , P.C. and Asif, J. (2016) Minimizing morphological defects of PEI hollow fibre membrane by optimizing the dope viscosity. [Citation Index Journal]

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Abstract

Phase inversion processes have been used to fabricate hollow fibre membranes but these processes often lead to morphological defects such as formation of macrovoids. Thus far, several approaches have been investigated to solve this problem, but no consensuses have been achieved. In this study, the optimal dope viscosity for PEI/NMP solution was elucidated to produce improved membrane morphological structure that can enhance its gas separation performance. Five concentrations of PEI/NMP dope solutions were prepared and their viscosities were measured. The critical viscosity was found to be at approximately 25 wt. % polymer concentration at ambient conditions. SEM analysis revealed that the most uniform finger-like pores with a thin skinned upper layer was obtained at critical dope viscosity.

Item Type:Citation Index Journal
Academic Subject One:Academic Department - Chemical Engineering - Material Development
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:12279
Deposited By: Dr. Oh Pei Ching
Deposited On:28 Nov 2017 04:45
Last Modified:28 Nov 2017 04:45

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