Host-guest nanofiltration membranes having amino-complexed cucurbituril supramolecular channel for monovalent/divalent salts separation

Wang, Ying; Zhao, Song; Zha, Zhiyuan; Wang, Zhi; Wang, Jixiao

doi:10.1016/j.desal.2022.115582

Cited by 19 publications

(7 citation statements)

References 59 publications

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“…As shown in Figure i–l, the surface roughness of the PA-BDSA membranes exhibited a significant decrease from 39.2 nm for PA membrane to 25.1 nm for PA-BDSA-0.2 membrane. The reduction of roughness decreased the mass transfer area of the membrane; thus, the permeance of the PA-BDSA membranes was significantly reduced compared to the PA membrane …”

Section: Resultsmentioning

confidence: 99%

Sulfonated Reverse Osmosis Membrane with Simultaneous Mitigation of Silica Scaling and Organic Fouling

Zhan

Zhao

et al. 2023

Ind. Eng. Chem. Res.

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Inorganic scaling and organic fouling remain limiting factors for the further application of reverse osmosis (RO) membranes. Herein, a novel monomer, 2,2′-benzidinedisulfonic acid (BDSA), was selected as a comonomer with m-phenylenediamine (MPD) to fabricate RO membranes. Compared with the polyamide (PA) composite membrane, the as-prepared PA-BDSA composite membrane exhibited enhanced surface hydrophilicity and a smoother, more negative charge (zeta potential of −44.4 mV at pH 7). During the 24 h antiscaling experiment with a saturated silica solution (SiO2 concentration of 168 ppm), the water flux decline rate of the PA-BDSA-0.2 membrane was only 18%, which was 10% lower than that of the PA membrane (28%). During antifouling and scaling-fouling experiments, the PA-BDSA membranes also displayed less flux loss than the PA membrane, indicating its simultaneous alleviation of organic fouling and silica scaling. The analysis of the fouling layer revealed that compared to the PA membrane, fewer contaminants adhered to the PA-BDSA membrane surface. Furthermore, the interactions between silica and organic foulants were investigated, and the synergy of sodium alginate (SA) and silica aggravated fouling and scaling processes, resulting in a more serious flux decline rate. This research reveals a simple and practical method for the preparation of RO membranes to mitigate membrane scaling and fouling.

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Section: Resultsmentioning

confidence: 99%

Sulfonated Reverse Osmosis Membrane with Simultaneous Mitigation of Silica Scaling and Organic Fouling

Zhan

Zhao

et al. 2023

Ind. Eng. Chem. Res.

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“…Recently, Zhao et al 52 reported a host-guest NF membrane with an amino complexed CB ordered supramolecular channel through IP. Because of the ''ring-like'' channel, negative charges on the membrane surface, and the strong size sieving effect, a high selectivity of monovalent/divalent salt was observed.…”

Section: Cucurbituril-based Membranesmentioning

confidence: 99%

Recent advances in separation membranes based on porous organic molecular materials

Saisai

Yang

Liu

et al. 2023

Mater. Chem. Front.

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“…In the eld of separation and purication at the molecular level, organic polymer-based nanoltration (NF) separation technology has become one of the most commonly used techniques for the separation of inorganic salts in the solution due to its high separation efficiency, low construction, and operation costs, and ease of operation. 48,49 Currently, the mainstream view is that the core mechanism of salt ion separation by NF technology is size sieving, dielectric repulsion, electrostatic interaction, and the synergistic effect of all three. The separation of different ions in solutes is achieved by using the difference in the solute size in the solution and the membrane pore size, the difference in the dielectric constant of solutes in the solution and the dielectric constant of the membrane separation layer, and the difference in ionic charge of solutes in the solution and the xed charge on the separation membrane.…”

Section: Introductionmentioning

confidence: 99%

New technology for preparing energetic materials by nanofiltration membrane (NF): rapid and efficient preparation of high-purity ammonium dinitramide (ADN)

et al. 2023

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Host-guest nanofiltration membranes having amino-complexed cucurbituril supramolecular channel for monovalent/divalent salts separation

Cited by 19 publications

References 59 publications

Sulfonated Reverse Osmosis Membrane with Simultaneous Mitigation of Silica Scaling and Organic Fouling

Sulfonated Reverse Osmosis Membrane with Simultaneous Mitigation of Silica Scaling and Organic Fouling

Recent advances in separation membranes based on porous organic molecular materials

New technology for preparing energetic materials by nanofiltration membrane (NF): rapid and efficient preparation of high-purity ammonium dinitramide (ADN)

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