Bridging the miscibility gap to fabricate delamination-free dual-layer nanofiltration membranes via incorporating fluoro substituted aromatic amine

Wang, Zhenyuan; Fu, Zheng‐Jun; Shao, Dandan; Lu, Meijin; Xia, Qian-Cheng; Xiao, Hu; Su, Baowei; Sun, Shi‐Peng

doi:10.1016/j.memsci.2020.118270

Cited by 36 publications

(18 citation statements)

References 48 publications

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“…Generally, the dual‐layer membranes prepared by PI and PEI without any additives exhibit severe delamination (Figure 3(a)), which is due to the poor miscibility between the two polymers 32 . Our previous study indicated that doping 4‐fluoro‐2 (trifluoromethyl) benzylamine (FTB) monomer into PI dope solution could eliminate delamination 31 . FTB can significantly improve the mutual affinity between PI and PEI by reducing the SPD.…”

Section: Resultsmentioning

confidence: 99%

“…The addition of BTBA and HTFDA at the same time improves the thermodynamic stability of the top layer, promoting the diffusion of THF. Furthermore, the elimination of the gap at the interface further hinders the nonsolvent exchange at the interface, which leads to a denser interface structure and lower n‐hexane permeance 31 . The ascending lecithin rejection is attributed to the rapid diffusion of THF.…”

Section: Resultsmentioning

confidence: 99%

“…We further established the relationship between solubility parameter difference (SPD) and delamination-adhesion transition. 31 By adding the appropriate amount of a fluoro substituted aromatic amine to the PI dope, the SPD between PI and polyetherimide (PEI) is significantly reduced.…”

Section: Introductionmentioning

confidence: 99%

“…When the bottom layer is more hydrophilic than the top layer, water is prone to quickly penetrate from the top layer to the bottom layer, instead of accumulating at the membrane interface during the phase inversion process. We further established the relationship between solubility parameter difference (SPD) and delamination‐adhesion transition 31 . By adding the appropriate amount of a fluoro substituted aromatic amine to the PI dope, the SPD between PI and polyetherimide (PEI) is significantly reduced.…”

Section: Introductionmentioning

confidence: 99%

“…indicated that doping 4-fluoro-2 (trifluoromethyl) benzylamine (FTB) monomer into PI dope solution could eliminate delamination 31. FTB can significantly improve the mutual affinity between PI and PEI by reducing the SPD.…”

mentioning

confidence: 99%

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Dual‐layer membrane with hierarchical hydrophobicity and transport channels for nonpolar organic solvent nanofiltration

Wang

Liu

et al. 2021

AIChE Journal

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Nonpolar solvent separation is widely used in petroleum, chemical, food industries, but traditional separation methods consume intensive energy. State-of-art organic solvent nanofiltration membranes require complex modifications for nonpolar solvent transport. For the first time, we propose the concurrent modification of the surface, interface and support layer of dual-layer membranes with three additives (perfluorodecylamine, fluoro substituted aromatic amine, silica nanoparticles) in a onestep cocasting process. A delamination-free dual-layer membrane was obtained with a hierarchical hydrophobicity and transport channels. The novel designed structure elevated the pure n-hexane permeance (28.75 L m −2 hr −1 bar −1) by 3 orders of magnitude with a high lecithin rejection (98.7%). This method of synergistically controlling the hierarchical structures and properties of dual-layer membranes can significantly shorten the preparation process of high-performance nonpolar solvent nanofiltration membranes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Dual‐layer membrane with hierarchical hydrophobicity and transport channels for nonpolar organic solvent nanofiltration

Wang

Liu

et al. 2021

AIChE Journal

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Fabrication and optimization of PES/PVP hollow fiber membranes using Box–Behnken model and CART algorithm

Farooq,

Cora

2024

J of Applied Polymer Sci

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This study focuses on the optimization of polyethersulfone (PES) hollow fiber membranes fabricated with the phase inversion method. A Box–Behnken experimental design was employed with three different PES concentration ratios (11, 14, 17 wt.%), three polyvinylpyrrolidone (PVP) molecular weight ratios (K30/K90 ratios of 6:0, 3:3, 0:6 wt.%), three different bore fluid (BF) composition ratios (water/alcohol ratios of 20:80, 60:40, 100:0), and three different air gap values (24, 37, and 50 cm). The results were analyzed in terms of pure water permeability (PWP) and porosity as optimization parameters using response surface methodology and the classification and regression tree (CART) model. ANOVA results revealed significant effects of PES concentration, PVP molecular weight, and BF composition on the outcomes. After optimization, the maximum PWP and the maximum porosity were obtained as 360.15 L/m2 h bar, 60.57%, respectively. The CART model achieved sufficient accuracy in classifying samples.

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Lithium-based draw solute for forward osmosis to treat wastewater discharged from lithium-ion battery manufacturing

Chen

Dong

2022

Front. Chem. Sci. Eng.

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Bridging the miscibility gap to fabricate delamination-free dual-layer nanofiltration membranes via incorporating fluoro substituted aromatic amine

Cited by 36 publications

References 48 publications

Dual‐layer membrane with hierarchical hydrophobicity and transport channels for nonpolar organic solvent nanofiltration

Dual‐layer membrane with hierarchical hydrophobicity and transport channels for nonpolar organic solvent nanofiltration

Fabrication and optimization of PES/PVP hollow fiber membranes using Box–Behnken model and CART algorithm

Lithium-based draw solute for forward osmosis to treat wastewater discharged from lithium-ion battery manufacturing

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