Synergistic regulation of macrocyclic polyamine-based polyamide nanofiltration membranes by the interlayer and surfactant for divalent ions rejection and mono-/di-ions sieving

Wang, Ming; Li, Mengxin; Fei, Zhaohui; Li, Jiakun; Ren, Zhongyi; Hou, Yingfei

doi:10.1016/j.desal.2022.116131

Cited by 28 publications

(5 citation statements)

References 76 publications

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“…Meanwhile, introducing abundant polar groups (i.e., NH 2 ) also lead to improved membrane hydrophilicity (Figure 3C and Table S2). 36 These results reveal that the introduced PEI increases the hydrophilicity and reduces the negative charges of PA membranes, which reduces the adsorption of foulants for better antifouling ability (Figure 2F,G). S8).…”

Section: Membrane Morphology and Physicochemical Propertiesmentioning

confidence: 74%

Ionic liquid‐induced deep grafting of polyelectrolyte to reform polyamide layer for antifouling nanofiltration membrane

Liu

Wan

et al. 2023

AIChE Journal

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Surface grafting has been widely used to tune hydrophilicity and chargeability of nanofiltration membranes for reducing membrane fouling potential. However, surface grafting typically leads to a significant pore narrowing and resultant permeability loss, and monocharged surface still struggles to resist mixed foulants with different charges. Herein, ionic liquid (IL)‐ethanol (EtOH) solution containing polyethyleneimine (PEI) is used to rearrange the nascent polyamide layer. The high affinity of IL to the PA layer and the low diffusion steric hindrance of EtOH contribute to the polyamide swelling and PEI deep grafting, during which the “self‐regulation” effect (larger pores would be filled with more PEI molecules) narrows the pore size distribution and enhances hydrophilicity. The nearly charge‐neutral and smooth separation layer shows impressive antifouling capacity to hydrophobic macromolecules and mixed charged molecules, along with long‐term operating stability for real wastewater treatment. This study emphasizes the importance of solvent properties on the membrane grafting behavior.

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Section: Membrane Morphology and Physicochemical Propertiesmentioning

confidence: 74%

Ionic liquid‐induced deep grafting of polyelectrolyte to reform polyamide layer for antifouling nanofiltration membrane

Liu

Wan

et al. 2023

AIChE Journal

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“…In Table 5 , which summarizes the results of the nanofiltration separation of ganoderma lucidum spores’ oil, it is evident that the transmittances of DBP and DEP were comparable to those of total triterpenes and ganoderic acid A without ultrasound, contradicting the sieving theory of nanofiltration [31] . DBP and DEP had significantly higher transmittances than total triterpenes and ganoderic acid A when ultrasonic powers increased.…”

Section: Resultsmentioning

confidence: 94%

Ultrasonic-assisted supercritical fluid separation removing plasticizers from ganoderma lucidum spores’ oil

Li,

Ma,

Shen

et al. 2023

Ultrasonics Sonochemistry

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“…During the improved IP reaction, the amphipathic interlayer fully implements various roles through functionalized portions of both the hydrophilic segment and the hydrophobic groups (Figure b). In detail, the hydrophilic groups of the interlayer that have good affinity toward PIP can uptake more PIP monomers . The interaction between the interlayer and the PIP results in the vigorous control of releasing effective monomers, thus inducing an ordered IP reaction .…”

Section: Resultsmentioning

confidence: 99%

“…In detail, the hydrophilic groups of the interlayer that have good affinity toward PIP can uptake more PIP monomers. 42 The interaction between the interlayer and the PIP results in the vigorous control of releasing effective monomers, thus inducing an ordered IP reaction. 40 On the other hand, the enrichment of the PIP concentration adjacent to the reactive interface in the aqueous phase is also a fundamental factor that essentially ensures sufficient content for the next cross-linking toward the nonpolar phase.…”

Section: Characterizations Of Tfc Membrane Structures and Propertiesmentioning

confidence: 99%

Amphiphilic Interlayer Regulated Interfacial Polymerization for Constructing Polyamide Nanofiltration Membranes with High Perm-Selectivity of Mono-/Divalent Salts

Zhang,

et al. 2024

ACS Appl. Mater. Interfaces

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High-quality thin-film composite (TFC) membranes with high selectivity and permeability have great significance owing to their practical applications, specifically for the accurate differentiation of monovalent and divalent ions. However, the trade-off effect between selectivity and permeability is still a big challenge due to the difficult structure adjustment of the selective layer. Herein, polydopamine (PDA) functionalized with a hydrophobic long alkane chain was first explored as a functional amphiphilic interlayer to synthesize high-quality TFC membranes via a confined interfacial polymerization (IP) reaction. The amphiphilic interlayer not only restricted the formation of the polyamide (PA) matrix in the pores of the substrate but also accelerated spatially more homogeneous polymerization and formed a PA active layer with a more uniform pore size distribution. The method may provide an effective principle for the construction of versatile polyamide-based membranes with high perm-selectivity on various supports. The NaCl/Na2SO4 separation factor of the D-8/PA membrane reached as high as 204.07, while the flux increased up to 25.71 L m–2 h–1 bar–1. This progress provides a more feasible way for the construction of high-quality TFC membranes with a devisable and creative amphiphilic interlayer for industrial application.

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Synergistic regulation of macrocyclic polyamine-based polyamide nanofiltration membranes by the interlayer and surfactant for divalent ions rejection and mono-/di-ions sieving

Cited by 28 publications

References 76 publications

Ionic liquid‐induced deep grafting of polyelectrolyte to reform polyamide layer for antifouling nanofiltration membrane

Ionic liquid‐induced deep grafting of polyelectrolyte to reform polyamide layer for antifouling nanofiltration membrane

Ultrasonic-assisted supercritical fluid separation removing plasticizers from ganoderma lucidum spores’ oil

Amphiphilic Interlayer Regulated Interfacial Polymerization for Constructing Polyamide Nanofiltration Membranes with High Perm-Selectivity of Mono-/Divalent Salts

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