PSF hollow fiber membrane fabricated from PSF–HBPE–PEG400–DMAc dope solutions via reverse thermally induced phase separation (RTIPS) process

Zhao, Liang; Xu, Zheng; Wei, Yong‐Ming; Xu, Min-Xian

doi:10.1016/j.ces.2015.06.017

Cited by 32 publications

(15 citation statements)

References 23 publications

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“…The liquid–liquid displacement porosimetry (LLDP) method was used by many researchers to acquire pore size distributions and molecular weight cut‐off (MWCO) values due to its precise, accurate, and reliable nature . However, in this study, a simple and efficient method was used to investigate the pores of the composite membranes . Figure clarifies the relationship between MWCNTs‐COOH content, pure water flux, and DEX 600k rejection.…”

Section: Resultsmentioning

confidence: 96%

Preparation and characterization of a novel hydrophilic PVDF/PVA UF membrane modified by carboxylated multiwalled carbon nanotubes

Chen

et al. 2016

Polym Eng Sci

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Polyvinylidene fluoride (PVDF)/polyvinyl alcohol (PVA) ultrafiltration (UF) membranes were prepared via a phase inversion method employing the modification of carboxylated multiwalled carbon nanotubes (MWCNTs-COOH). Various contents of MWCNTs-COOHs (0.00-0.15 wt%, weight of casting solution) were added into PVDF/PVA/dimethyl sulfoxide systems for the fabrication of the plate UF membrane. Fourier transform infrared spectroscopy spectra identified the successful introduction of carboxyl through the C@O peak at 1730 cm 21 . Scanning electron microscopy images exhibited the external surface and the asymmetric morphology with the appearance of a sponge-like inner structure. Atomic force microscopy analysis determined the roughness values and rougher topography. The hydrophilicity of the composite membrane containing 0.09 wt% of MWCNTs-COOHs improved the most. This sample has the highest pure water flux, approximately doubled (126.6 L m 22 h 21 ) compared to the PVDF/PVA membrane (68.6 L m 22 h 21 ), an enhanced bovine serum albumin flux recovery rate, showing an increase of 17%, and the best fouling resistance ability. Meanwhile, the porosity and dynamic contactangle also indicate the enhancement of membrane hydrophilicity. Dextran (DEX) 600k rejection reached 91.0%. Break strength, elongation at break, and Young's modulus also had improvements of 60%, 215.5%, and 56.7%, respectively, when the MWCNTs-COOH content was 0.12 wt%. POLYM. ENG. SCI.,

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Section: Resultsmentioning

confidence: 96%

Preparation and characterization of a novel hydrophilic PVDF/PVA UF membrane modified by carboxylated multiwalled carbon nanotubes

Chen

et al. 2016

Polym Eng Sci

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“…The binary phase diagram has been widely utilized in liquid−liquid phase separation (LLPS) induced by temperature and concentration [31][32][33] . However, the oiling out phenomenon cannot be completely suppressed for composition-induced LLPS because of the limited information provided by a binary phase diagram,.…”

Section: Introductionmentioning

confidence: 99%

Process Design for Antisolvent Crystallization of Erythromycin Ethylsuccinate in Oiling-out System

Yin

Zhang

et al. 2016

Ind. Eng. Chem. Res.

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The crystallization process of erythromycin ethylsuccinate in a tetrahydrofuranwater system was investigated. Results show that oiling out occurs under several conditions; hence, a phase diagram with a liquid-liquid equilibrium area was established experimentally. For improved understanding of oiling-out crystallization, a series of in-situ tools, including FBRM, ATR-FTIR, and PVM, were applied to monitor the oiling-out phenomenon and the subsequent nucleation of erythromycin ethylsuccinate. SEM images were employed to analyze the influence of oiling out on the properties of the final crystals. The nucleation mechanism of erythromycin ethylsuccinate differs significantly depending on the location of the line of operation.The combination of cooling method and anti-solvent crystallization can be achieved with fundamental data of the phase diagram to suppress the oiling out phenomenon and obtain crystal products with high quality. The ternary phase diagram is of great importance in the process design of anti-solvent crystallization for an oiling-out system.

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“…As a new membrane formation technology, our earlier studies [ 25 , 26 , 27 , 28 , 29 , 30 ] introduced a novel reverse thermally induced phase separation (RTIPS) technology. The RTIPS method combines a low membrane formation temperature with fast heat transfer.…”

Section: Introductionmentioning

confidence: 99%

A Facile Way to Prepare Hydrophilic Homogeneous PES Hollow Fiber Membrane via Non-Solvent Assisted Reverse Thermally Induced Phase Separation (RTIPS) Method

et al. 2019

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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.

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PSF hollow fiber membrane fabricated from PSF–HBPE–PEG400–DMAc dope solutions via reverse thermally induced phase separation (RTIPS) process

Cited by 32 publications

References 23 publications

Preparation and characterization of a novel hydrophilic PVDF/PVA UF membrane modified by carboxylated multiwalled carbon nanotubes

Preparation and characterization of a novel hydrophilic PVDF/PVA UF membrane modified by carboxylated multiwalled carbon nanotubes

Process Design for Antisolvent Crystallization of Erythromycin Ethylsuccinate in Oiling-out System

A Facile Way to Prepare Hydrophilic Homogeneous PES Hollow Fiber Membrane via Non-Solvent Assisted Reverse Thermally Induced Phase Separation (RTIPS) Method

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