Fabricating PES/SPSF membrane <i>via</i> reverse thermally induced phase separation (RTIPS) process to enhance permeability and hydrophilicity

Liu, Shenghui; Yang, Hang; Ji, Shifeng; Gao, Chunmei; Fang, Han; Xing, Yunqing; Han, Nai-Xu; Ding, Guodong; Jia, Lei

doi:10.1039/c9ra05707b

Cited by 16 publications

(4 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As seen in the Figure, the SEM micrographs indicate that the addition of C60-ZSM-22 zeolite additives has pretentious significance on the morphological and structural forms of the PES membranes. This can be ascribed to the observed reduction in pore size (as manifested by the formation of smaller pores than in the pure PES substrate) and intensification of the pore densities as wt.% zeolite loadings increase, which is also observed elsewhere [65]. This shows that C60-ZSM-22 zeolite loading into the PES matrix has contributed to the development of membranes with high porosity, which protracts all through the membrane surface.…”

Section: Scanning Electron Microscopy (Sem) Surface Analysissupporting

confidence: 63%

Influence of the Zeolite ZSM-22 Precursor on a UF-PES Selective Substrate Layer for Salts Rejection

2022

View full text Add to dashboard Cite

Fabrication of the ZSM-22/Polyethersulfone (ZSM-22/PES) membranes as selective salt filters represent a growing membrane technological area in separation with the potential of high economic reward based on its low energy requirements. The incorporation of ZSM-22 zeolite material as additives into the PES polymer matrix has the prospective advantage of combining both the zeolite and polymer features while overcoming the limitations associated with both materials. This work investigated the influence of the nature of the silica precursor on ZSM-22 zeolite hydrothermally synthesised using colloidal (C60) and fumed (C60) silica to Si/Al of 60. The successful synthesis of the highly crystalline zeolitic materials was confirmed through XRD, FTIR, and SEM with EDX. The ZSM-22 additives were directly dispersed into a PES polymeric matrix to form a casting solution for the preparation of the ZSM-22/PES selective substrate layers via a phase inversion method for salts rejection. The polymeric PES was selected as an organic network in which the content of the ZSM-22 zeolite (ranging between 0 and 1.0 wt.%), was obtained and characterised by XRD, FTIR, and SEM analysis, as well as water contact angle (WCA) measurement and dead-end filtration cell. The phase inversion preparation method has induced the resulting ZSM-22/PES NF substrates anisotropy, as attributed to a high water flux to the above 700 L·m−2·h−1; high selectivity and rejection of salts to above 80% is revealed by the obtained results. The materials also exhibited improved antifouling behavior to above 70% flux recovery ratios. As such, the nature of the silica precursor influences ZSM-22 zeolite synthesis as a potential additive in the PES polymer matrix and led to the enhanced performance of the pure PES ultrafiltration membrane.

show abstract

Section: Scanning Electron Microscopy (Sem) Surface Analysissupporting

confidence: 63%

Influence of the Zeolite ZSM-22 Precursor on a UF-PES Selective Substrate Layer for Salts Rejection

2022

View full text Add to dashboard Cite

show abstract

“…For example, in a PES/SPSf polymer blend membrane system, increasing the SPSf content in the range 0-4 wt% increased the surface roughness. 40 Several researchers have demonstrated an increase in the surface roughness in mixed matrix PES/SPSf systems. For example, Gumbi et al also demonstrated that increasing the oxidized MWCNT wt% in the range 0-0.1 wt% a PES/SPSf system resulted in increased surface roughness.…”

Section: Atomic Force Microscopy Analysis Of Membranes Active Surfacementioning

confidence: 99%

Polymer blending and nanophotocatalyst loading synergy in visible light‐driven photocatalytic PES/SPSf mixed matrix membranes

Zikalala,

Gumbi,

et al. 2024

Journal of Polymer Science

View full text Add to dashboard Cite

The synergy of polymer blending and loading photocatalytic titania–amorphous carbon nanotubes (TiO2–aCNT) in tailoring the morphological, surface, and optoelectrical properties of membranes is investigated. High energy band gap (Eg) polyethersulfone (PES), and low Eg sulfonated polyethersulfone (SPSf) polymer blends were loaded with TiO2–aCNT nanocomposite fillers. SEM reveals membranes consisting of a selective layer, a dense sublayer and a spongy layer with the latter two consisting of a network of nanofibers whose diameters decrease with increasing TiO2–aCNT loading. The downshifting in the wavenumbers of sulfonyl and sulfone peaks in Fourier transform infrared and Raman spectra confirms bonding of TiO2–aCNT with PES/SPSf via these groups. Blending PES with SPSf decreases the Eg of the membranes while loading TiO2–aCNT produces a second band edge corresponding to = 2.8 eV. Suppression of charge recombination in membranes is realized at 1.2 filler wt.%. Charge separation occurrs via shuttling of the positive holes to the aCNTs and valence band of TiO2 while electrons are shuttled to the conduction bands of PES and SPSf. Electron impedance spectroscopy shows TiO2–aCNT loading reduces polymer membrane resistance to charge transport. Dye degradation up to 85% is realized under direct sunlight irradiation accompanied by mineralization.

show abstract

“…He also developed full-biobased nanofiltration membranes. 16 (PVB), 25 poly(ethylene) (PE), 26 polyethersulfone (PES), 27 polypropylene (PP), poly(ethylene-co-vinyl alcohol) (EVOH) 28 and other polymers. 29 Although TIPS needs extra thermal energy compared with NIPS, it also brings several advantages.…”

Section: Ivomentioning

confidence: 99%

Recent advances in polymer membranes employing non-toxic solvents and materials

et al. 2021

View full text Add to dashboard Cite

show abstract

Fabricating PES/SPSF membrane via reverse thermally induced phase separation (RTIPS) process to enhance permeability and hydrophilicity

Abstract: A new method is presented to prepare hydrophilic PES/SPSF flat-sheet membrane by a reverse thermally induced phase separation (RTIPS) method to enhance permeability and hydrophilicity.

Cited by 16 publications

References 32 publications

Influence of the Zeolite ZSM-22 Precursor on a UF-PES Selective Substrate Layer for Salts Rejection

Influence of the Zeolite ZSM-22 Precursor on a UF-PES Selective Substrate Layer for Salts Rejection

Polymer blending and nanophotocatalyst loading synergy in visible light‐driven photocatalytic PES/SPSf mixed matrix membranes

Recent advances in polymer membranes employing non-toxic solvents and materials

Contact Info

Product

Resources

About