Abstract
Sulfonated polyethersulfone (SPES) was used as an additive to prepare hydrophilic poly(ethersulfone) (PES) hollow fiber membranes via non-solvent assisted reverse thermally induced phase separation (RTIPS) process. The PES/SPES/N,N-dimethylacetamide (DMAc)/ polyethylene glycol 200 (PEG200) casting solutions are lower critical solution temperature (LCST) membrane forming systems. The LCST and phase separation rate increased with the increase of SPES concentrations, while the casting solutions showed shear thinning. When the membrane forming temperature was higher than the LCST, membrane formation mechanism was controlled by non-solvent assisted RTIPS process and the also membranes presented a more porous structure on the surface and a bi-continuous structure on the cross section. The membranes prepared by applying SPES present higher pure water flux than that of the pure PES membrane. The advantages of the SPES additive are reflected by the relatively high flux, good hydrophilicity and excellent mechanical properties at 0.5 wt.% SPES content.
Highlights
Polyethersulfone (PES) is a thermoplastic polymer developed by ICI Company in 1972
Han et al [21] prepared Mg(OH)2 /PES hybrid membranes by in-suit synthesized phase inversion method, and the results showed that nano-sized Mg(OH)2 was formed and distributed uniformly in PES matrix membrane
With regard to casting solutions, DMAc was used as the good solvent, while polyethylene glycol 200 (PEG200) was used as the non-solvent
Summary
Min Liu 1,2, * , Anne Ladegaard Skov 2 , Sheng-Hui Liu 3 , Li-Yun Yu 2 and Zhen-liang Xu 1,3, *. Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Key Laboratory of Advanced. Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology (ECUST), 130 Meilong Road, Shanghai 200237, China. Received: 10 January 2019; Accepted: 29 January 2019; Published: 5 February 2019
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