Effect of cross-linking on the performance of polymer inclusion membranes (PIMs) for the extraction, transport and separation of Zn(II)

Hoque, Bosirul; Almeida, M. Inês G.S.; Cattrall, Robert W.; Gopakumar, Thiruvancheril G.; Kolev, Spas D.

doi:10.1016/j.memsci.2019.117256

Cited by 35 publications

(21 citation statements)

References 32 publications

(50 reference statements)

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“…On the other hand, although the permeability coefficient and initial flux of cross‐linked PVDF‐HFP based membrane were also larger compared with that of the corresponding non‐cross‐linked membrane, the difference between these two membranes was not as significant as that of CTA based PIMs. A similar results were found by Hoque et al 25 who used PIM with bis‐(2‐ethylhexyl)phosphoric acid (D2EHPA) as the carrier and 2‐NPOE as the plasticizer to extract Zn(II). Results found that the cross‐linked membrane containing CTA as base polymer provided superior Zn(II) extraction efficiency than its non‐cross‐linked membrane, which were about 28 and 22 mg g −1 , respectively.…”

Section: Resultssupporting

confidence: 81%

“…As displayed, all the PIMs showed hydrophilic property with the contact angle well below 90°.The contact angle values for cross‐linked CTA and PVDF‐HFP based membranes were 26.7° and 18.5°, respectively, which were much lower than their non‐cross‐linked counterparts (32.7° and 42.3°, respectively). This observation was related to the introduction of hydrophilic PEG groups in PEG‐DMA polymer after crosslinking 25 . Studies have illustrated that ion exchange membranes with more hydrophilic nature are more ion conductive 27 .…”

Section: Resultsmentioning

confidence: 99%

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Crosslinking improved ion transport in polymer inclusion membrane‐electrodialysis process and the underlying mechanism

et al. 2021

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Electric field intensification has been demonstrated as an effective strategy for facilitating ion transfer and separation in polymer inclusion membrane (PIM) involved processes. However, it is still a challenge to develop compatible PIMs with high performance and to reveal the underlying mechanisms. Herein, crosslinked PIMs with different base polymers have been employed in PIM‐electrodialysis processes. Cross‐linked cellulose triacetate (CTA) based PIMs exhibited significant improvement in Cr(VI) transport, which permeability coefficient was 5.9 times larger than the non‐cross‐linked counterpart. The characterizations of cross‐linked PIMs showed higher hydrophilicity and lower membrane area resistance. Furthermore, cross‐linked polymeric network inside CTA based PIMs structure increased their crystallinity, thus supporting the fixed‐site jumping mechanism, thereby enabling ions to be transported directly in a manner of continuous pathway at low current density. This study shed light on further improvement of efficient ion transport and gave insights into the mechanism understanding in PIM‐ED systems.

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Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Crosslinking improved ion transport in polymer inclusion membrane‐electrodialysis process and the underlying mechanism

et al. 2021

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“…The advantages of cross‐linking polymer inclusion membranes (PIM) was investigated by Hoque, Almeida, Cattrall, Gopakumar, and Kolev (2019) using three different base‐polymers as follows: poly (Vinyl chloride) (PVC), poly (vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP), and cellulose triacetate (CTA). CTA‐based PIMs demonstrated a better extraction rate when compared to PVDF‐HFP based PIMs or non‐cross‐linked PIMS containing PVDF‐HFP base polymer.…”

Section: Industrial Wastewater Treatmentmentioning

confidence: 99%

Membrane processes

Arabi¹,

Pellegrin

Aguinaldo

et al. 2020

Water Environment Research

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This literature review provides a review for publications in 2018 and 2019 and includes information membrane processes findings for municipal and industrial applications. This review is a subsection of the annual Water Environment Federation literature review for Treatment Systems section. The following topics are covered in this literature review: industrial wastewater and membrane. Bioreactor (MBR) configuration, membrane fouling, design, reuse, nutrient removal, operation, anaerobic membrane systems, microconstituents removal, membrane technology advances, and modeling. Other subsections of the Treatment Systems section that might relate to this literature review include the following: Biological Fixed-Film Systems, Activated Sludge, and Other Aerobic Suspended Culture Processes, Anaerobic Processes, and Water Reclamation and Reuse. This publication might also have related information on membrane processes: Industrial Wastes, Hazardous Wastes, and Fate and Effects of Pollutants.

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“…Different authors refer to these processes as the complexation induced phase separation (CIPS) and reaction induced phase separation (RIPS) using crosslinkers dissolved in a solvent bath. Unlike some crosslinking processes [ 32 , 33 ] the CIPS and RIPS occur instantaneously through chemical association. By using the same solvent of the dope solution, the polymer-metal complex rapidly precipitates in CIPS/RIPS through crosslinking at the interface.…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Performance of PTU-Cu Composite Membrane Fabricated through Simultaneous Complexation and Non-Solvent Induced Phase Separation

2021

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This study aims to integrate copper (Cu) during membrane formation by a facile simultaneous phase separation process to alleviate biofouling and improve membrane performance. Polythiourea (PTU) polymer synthesized through condensation polymerization of 4,4-oxydianiline and p-phenylene diisothiocyanate in dimethyl sulfoxide was used in the preparation of dope solution. By incorporating different concentrations of cupric acetate in the non-solvent bath, both non-solvent induced phase separation and complexation induced phase separation occur instantaneously. Scanning electron microscopy—energy dispersive X-ray, fourier-transform infrared spectroscopy and time-of-flight secondary ion mass spectroscopy analysis accompanied by color change of the membrane surfaces—confirms the interaction of the polymer with Cu. Interaction of Cu at the interface during membrane formation results in a decrease in contact angle from 2 to 10° and a decrease in surface roughness from 30% to 52% as measured by atomic force microscope analysis. Pure water flux of PTU-Cu membrane increased by a factor of 3 to 17 relative to pristine PTU membrane. Both the pristine PTU and PTU-Cu membrane showed antibacterial characteristics against E. coli.

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Effect of cross-linking on the performance of polymer inclusion membranes (PIMs) for the extraction, transport and separation of Zn(II)

Cited by 35 publications

References 32 publications

Crosslinking improved ion transport in polymer inclusion membrane‐electrodialysis process and the underlying mechanism

Crosslinking improved ion transport in polymer inclusion membrane‐electrodialysis process and the underlying mechanism

Membrane processes

Characteristics and Performance of PTU-Cu Composite Membrane Fabricated through Simultaneous Complexation and Non-Solvent Induced Phase Separation

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