Influence of hydrophobic components tuning of poly (aryl ether sulfone)s ionomers based anion exchange membranes on diffusion dialysis for acid recovery

Chen, Caidi; Xie, Hengxin; Jiang, Yuyao; Chen, Yawen; Liang, Yiran; Ruzetuoheti, Gulihumaer; Liao, Shijun; Li, Xiuhua; Wei, Biaowen

doi:10.1016/j.memsci.2021.119562

Cited by 28 publications

(8 citation statements)

References 45 publications

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“…It indicated that the introduction of AE-Res into the epoxy network as a curing agent endowed the thermosets with improved surface hydrophobicity and moisture resistance. On the one hand, the rigid conjugated hydrophobic structures were constructed by containing more benzene structures in AE-Res and biphenyl structures in BPDGE . On the other hand, it was mainly attributed to the advantage that active ester curing systems did not produce hydroxyl groups.…”

Section: Resultsmentioning

confidence: 99%

“…On the one hand, the rigid conjugated hydrophobic structures were constructed by containing more benzene structures in AE-Res and biphenyl structures in BPDGE. 55 On the other hand, it was mainly attributed to the advantage that active ester curing systems did not produce hydroxyl groups. Therefore, the hydrophobicity of AE-Res/BPDGE was highly improved compared with conventional epoxy curing systems.…”

Section: Optical Properties Of the Cured Epoxy Systemsmentioning

confidence: 99%

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Resveratrol-Derived Liquid Crystal Epoxy Resin with Low-Dielectric Properties and Excellent Mechanical Strength and Toughness

Yang,

Yuan,

Jiao

et al. 2024

ACS Appl. Polym. Mater.

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The application of ordinary epoxy resins is severely limited by their poor dielectric properties and toughness, and the increasing focus on sustainability calls for raw materials to be renewable. Thus, a resveratrol-based compound (AE-Res) with three active ester structures was prepared and used to cure glycidyl ethers of bisphenol A (DGEBA) and a liquid crystal epoxy monomer (BPDGE). Test results showed that the combination (AE-Res/BPDGE) of resveratrol derivatives with liquid crystal epoxy monomers exhibited an excellent comprehensive performance. The mechanical strength and toughness of AE-Res/BPDGE were improved. Specifically, the tensile strength, elongation at break, flexural strength, and impact strength of AE-Res/BPDGE were 108.45 MPa, 12.31%, 159.92 MPa, and 39.51 kJ/m 2 , which were 48.14, 164.16, 92.51, and 143.74% higher than that of BPDGE cured by commercial methylhexahydrophthalic anhydride (MHHPA), respectively. This can be attributed to the introduction of a rigid structure and flexible ether bonds generated after curing. Meanwhile, the dielectric constant (D k ) of AE-Res/ BPDGE decreased from 3.81 to 3.00 (10 MHz) compared to MHHPA/BPDGE, mainly owing to the enhanced d-spacing (4.69 vs 4.45 Å) and the absence of highly polar hydroxyl groups. In addition, AE-Res/BPDGE also exhibited good thermal stability and hydrophobicity with a T 5% of 383.22 °C, a water contact angle of 110°, and a water absorption of 0.15% because of the presence of a rigid conjugated stilbene and biphenyl structure. Due to its ease of synthesis and environmental friendliness, AE-Res could be a satisfactory alternative to commercial epoxy curing agents.

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Section: Resultsmentioning

confidence: 99%

Section: Optical Properties Of the Cured Epoxy Systemsmentioning

confidence: 99%

Resveratrol-Derived Liquid Crystal Epoxy Resin with Low-Dielectric Properties and Excellent Mechanical Strength and Toughness

Yang,

Yuan,

Jiao

et al. 2024

ACS Appl. Polym. Mater.

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“…Under the action of transmembrane pressure, water molecules could enter into the double-layer structure formed by the nanosheets, and both GO and GO-MPD membranes allowed the double-layer water molecules to flow into the double-layer structure. The density of water molecules in the double-layer structure of the GO-MPD membrane was smaller than that of the GO membrane, but the distance between the layers of GO-MPD membranes was larger than that of the GO membrane, and this may be because the hydrophobic benzene ring on MPD weakened the flow of water molecules in the GO-MPD membrane and reduced the water absorption capacity of the membrane. , Meanwhile, the presence of the benzene ring led to more complex structures in the nanochannels and made it difficult for water molecules to pass through the membrane. Although the presence of the benzene ring reduced the water permeability, it also hindered the transport of pollutant molecules in the nanochannels and improved the selectivity of the membrane, which was consistent with our experimental results.…”

Section: Results and Discussionmentioning

confidence: 99%

Cross-Linked and Doped Graphene Oxide Membranes with Excellent Antifouling Capacity for Rejection of Antibiotics and Salts

Zhou

Gong

et al. 2023

ACS Appl. Mater. Interfaces

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Graphene oxide (GO) membranes have suffered from the instability of water permeability and low rejection of pollutant separation. In this paper, a reasonable modification protocol for GO nanosheets at the molecular level was proposed. A molecular cross-linking strategy was adopted to regulate the interlayer spacing of GO nanosheets, and nanofiltration membranes with high water stability and excellent antifouling capacity were prepared, which could effectively reject antibiotics and salts. The GO 1 -MPD 0.5 (the mass ratio of GO nanosheets to MPD is 1:0.5) and GO/GO 1 -MPD 0.5 -0.25 (the doping ratio of GO 1 -MPD 0.5 is 25%) membranes had stable water permeability of 4.22 ± 0.06 and 3.65 ± 0.11 L m −2 h −1 bar −1 , and the rejection rates for ciprofloxacin (CIP) and ofloxacin (OFX) were 93.35 ± 3.62 and 95.48 ± 2.97 and 85.89 ± 6.52 and 88.21 ± 3.67%, respectively. Molecular dynamics simulations well explained the high water stability of membranes, and the cross-linked hydrophobic benzene ring played a role in the rejection of pollutant molecules. Moreover, the GO 1 -MPD 0.5 membrane showed excellent antifouling capacity and the flux recovery ratio (FRR) was more than 98%. This paper provides a new idea for the design of nanofiltration membranes with high stability and good rejection permeability at the molecular level and provides a prospect for the application of nanofiltration membranes in practical water treatment and water purification.

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“…Sulfamic acid (SA) contains −SO 3 H (acidic) and −NH 2 (weak basic) groups, which can be used to replace the inherent conductivity/permeability balance of the proton exchange membrane. 31 Herein, a series of proton exchange membranes containing secondary amine and sulfonic acid groups for the VRFB were prepared by one-step activation of SPEEK sulfonic acid groups by N,N′-carbonyl diimidazole. The produced membranes' proton conductivity, vanadium ion permeability, water absorption, swelling degree, mechanical characteristics, and VRFB cycle performance were all measured.…”

Section: Introductionmentioning

confidence: 99%

“…However, the drawbacks of a high expansion rate, substantial vanadium ion penetration, and high cost are the key issues for large-scale deployment of Nafion membranes in VRFBs. , Many efforts have been made to date to produce innovative ion-selective membranes with improved performance and cheaper costs, such as cross-linking-modified − and polymer-blended composite membranes. − Because of their low cost, stability, and ease of manufacture, sulfonated poly(ether ether ketone) membranes (SPEEK) have received a lot of interest. ,,,− Amphoteric ion exchange membranes with fixed cations and anion exchange groups have received a lot of interest in recent years. , Due to electrostatic repulsion, the positive ion group can effectively prevent the positive diffusion of vanadium ions under battery operating conditions, while the negative ion group provides optimum proton conductivity. Sulfamic acid (SA) contains −SO 3 H (acidic) and −NH 2 (weak basic) groups, which can be used to replace the inherent conductivity/permeability balance of the proton exchange membrane …”

Section: Introductionmentioning

confidence: 99%

Side-Chain Grafting-Modified Sulfonated Poly(ether ether ketone) with Significantly Improved Selectivity for a Vanadium Redox Flow Battery

Wang

Wei

et al. 2023

Ind. Eng. Chem. Res.

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A sulfonated poly(ether ether ketone) (SPEEK) proton exchange membrane with side-chain grafted sulfamic acid (SA) was designed. The introduction of SA with an amphoteric functional group achieves the purpose of preventing the migration of vanadium ions in the case of a lossless proton conductive group (−SO3H), which is caused by the Donnan repulsion of a protonated −NH– group to a vanadium ion. At the same time, acid–base pairs and hydrogen bonds are formed between the sulfonated side-chain grafted secondary amine (−NH−) group and the sulfonic (−SO3H) group, which hinders the penetration of vanadium ions. The results show that the prepared SPEEK-SA-50 membrane has high proton conductivity (0.099 S cm–1) and vanadium ion selectivity (1.8 × 105 S min cm–3), and its selectivity is significantly improved compared with SPEEK (4.9 × 104 S min cm–3) and the Nafion 212 membrane (4.8 × 104 S min cm–3). Under the condition of 80 mA cm–2, the Coulombic efficiency (CE) of the vanadium redox flow battery with the SPEEK-SA-50 membrane is 95.45%, and the energy efficiency (EE) is 76.11%, which is better than that of the Nafion 212 membrane (CE: 86.39%; EE: 68.26%).

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Influence of hydrophobic components tuning of poly (aryl ether sulfone)s ionomers based anion exchange membranes on diffusion dialysis for acid recovery

Cited by 28 publications

References 45 publications

Resveratrol-Derived Liquid Crystal Epoxy Resin with Low-Dielectric Properties and Excellent Mechanical Strength and Toughness

Resveratrol-Derived Liquid Crystal Epoxy Resin with Low-Dielectric Properties and Excellent Mechanical Strength and Toughness

Cross-Linked and Doped Graphene Oxide Membranes with Excellent Antifouling Capacity for Rejection of Antibiotics and Salts

Side-Chain Grafting-Modified Sulfonated Poly(ether ether ketone) with Significantly Improved Selectivity for a Vanadium Redox Flow Battery

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