Preparation of a positively charged NF membrane by evaporation deposition and the reaction of PEI on the surface of the C-PES/PES blend UF membrane

Bagheri, Maryam; Rajabzadeh, Saeid; Elmarghany, Mohamed R.; Moattari, Rozita M.; Bakhtiari, Omid; Inada, Asuka; Matsuyama, Hideto; Mohammadi, Toraj

doi:10.1016/j.porgcoat.2020.105570

Cited by 14 publications

(12 citation statements)

References 32 publications

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“…Their relatively poor performance in NF and RO systems is attributed by some in the literature to their weak mechanical stability as a consequence of their high amorphous and lower hydrophilic character [20][21][22][23]. As a result, PES membrane utilisation in NF/RO application is highly prone to fouling, which is considered the main limitation to the use of PES membranes in highly pressurised separation processes [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…However, the challenge remains regarding how to identify effective nanoadditives to mitigate membrane fouling. Suitable nanoadditives (in terms of particle size and hydrophilicity) are still needed for the development of highly functional membrane materials [8,25,33]. In this consideration, synthesising new polymer materials is not a priority given the opportunity to modify already existing polymer materials.…”

Section: Introductionmentioning

confidence: 99%

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Development of ZSM-22/Polyethersulfone Membrane for Effective Salt Rejection

2020

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ZSM-22/polyethersulfone membranes were prepared for salt rejection using modelled brackish water. The membranes were fabricated via direct ZSM-22 incorporation into a polymer matrix, thereby inducing the water permeability, hydrophilicity and fouling resistance of the pristine polyethersulfone (PES) membrane. A ZSM-22 zeolite material with a 60 Si/Al ratio, high crystallinity and needle-like morphologies was produced and effectively used as a nanoadditive in the development of ZSM-22/PES membranes with nominal loadings of 0–0.75 wt.%. The characterisation and membrane performance evaluation of the resulting materials with XRD, BET, FTIR, TEM, SEM and contact angle as well as dead-end cell, respectively, showed improved water permeability in comparison with the pristine PES membrane. These ZSM-22/PES membranes were found to be more effective and superior in the processing of modelled brackish water. The salt rejection of the prepared membranes for NaCl and MgCl2 was effective, while they exhibited quite improved water flux and flux recovery ratios in the membrane permeability and anti-fouling test. This indicates that different amounts of ZSM-22 nanoadditives produce widely divergent influences on the performance of the pristine PES membrane. As such, over 55% of salt rejection is observed, which means that the obtained membranes are effective in salt removal from water.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of ZSM-22/Polyethersulfone Membrane for Effective Salt Rejection

2020

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“…and M4 membranes were found to have isoelectric points around 4.6, 6.1 and 8.6, respectively, while the M1 membrane was positively charged in the whole pH range. The significant decrease in the surface acidity of the various membranes, compared CTA membranes [54,55], results from the addition of PEI in the membrane preparation and the resulting formation of positively charged quaternary ammonium groups [56,29]. It can be noticed that the addition of phosphorus-based additives (D2EHPA and TOPO) led to more basic surfaces (M1 and M4 membranes) compared with membranes containing TDDA and TOA (M2 and M3 membranes, respectively).…”

Section: M2 M3mentioning

confidence: 99%

“…Dialysis polymer membranes synthesized from mixtures of cellulose triacetate (CTA) and polyethyleneimine (PEI) were shown to be low-cost materials with good separation performance [27,28]. The addition of PEI has been widely used as it allows to form a charged layer on the membrane surface [29]. Furthermore, PEI can form complexes with heavy metals [30].…”

Section: Introductionmentioning

confidence: 99%

Recovery of rare earth elements from electronic waste by diffusion dialysis

Hammache

Bensaadi

Berbar

et al. 2021

Separation and Purification Technology

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Recycling rare earth elements (REEs) contained in electronic waste is of utmost importance due to their ever-increasing use in the high-tech sector. In this context, the use of non-polluting techniques represents a real challenge for scientists. In this work, we demonstrated that a clean and energy-efficient process, diffusion dialysis, has great potential for the recovery of neodymium (Nd) and praseodymium (Pr), contained in the Nd-Fe-B magnets of end-of-life computer hard disk drives (HDDs). Four kinds of polymer membranes were prepared by blending cellulose triacetate (CTA) and polyethylenimine (PEI) with the addition of di-(2ethylhexyl) phosphoric acid (D2EHPA), tridodecylamine (TDDA), trioctylamine (TOA) or trioctylphosphine oxide (TOPO). The membranes were first characterized by several techniques such as water uptake, contact angle, ATR-FTIR, SEM, XRD and zeta potential. They were further implemented in diffusion dialysis experiments in which diluted HDDs leachates were used as feed solutions. The relevance of the diffusion dialysis process for the recovery of REEs was demonstrated as it was possible to extract up to 15% of the boron by spontaneous diffusion through the CTA / PEI / TOA membrane in 6 hours with a lab-scale cell operating in batch mode. All membranes were positively charged under the operating conditions and then, REEs (present mainly in the form of trivalent cations Nd 3+ and Pr 3+) were strongly rejected. A fairly good correlation was found between the membrane water uptake and boron transfer, with boric acid molecules passing more easily through the more hydrated membranes. The selectivity factor between boron and REEs resulted from the interplay between the membrane structure, its water uptake ability and surface charge. It was also found to be dependent on the leachate composition. The CTA / PEI / TDDA membrane was found to exhibit the greatest B / REE selectivity factors, with values reaching up to 3706 and 140 for Nd and Pr, respectively. The lower selectivity towards Pr was explained by the weaker Gibbs energy of hydration of Pr 3+ cations compared with Nd 3+ .

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“…On tightening the base membrane (UF or MF membranes) pores, the pore size drastically decreases to the NF‐membrane pore‐size range of 1 to 10 nm. Recently, a new method for the fabrication of NF membranes has been under development mainly for brackish water softening 4–8 . In this method, a reactive functional group on the surface of a tight UF membrane reacts with a charged branched polymer.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics simulation for investigating and assessing reaction conditions between carboxylated polyethersulfone and polyethyleneimine

Rahmati

Rajabzadeh

Abdelrasoul

et al. 2021

J of Applied Polymer Sci

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Recently, nano‐filtration membranes are made by the reaction between a reactive functional group on the surface of a tight ultrafiltration membrane and a charged branched polymer. This reaction makes the selective layer of the nanofiltration membrane, which plays an essential role in membrane performance. A molecular dynamics simulation with a reactive force field was used to investigate the reaction of carboxylated polyethersulfone as the functional group of the ultrafiltration membrane with polyethyleneimine. Experimental elucidation of the reaction between the PEI amine and carboxyl groups is challenging, and an MD simulation was thus employed. Furthermore, the simulation results show that the PEI and carboxylated polyethersulfone polymers react with each other in a temperature‐dependent manner. While no reaction occurs at 298 K, carboxylated polyethersulfone and PEI begin to react when the temperature is increased from 298 to 323 K. Furthermore, a reversible reaction was observed with a subsequent increase in temperature to 353 K.

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Preparation of a positively charged NF membrane by evaporation deposition and the reaction of PEI on the surface of the C-PES/PES blend UF membrane

Cited by 14 publications

References 32 publications

Development of ZSM-22/Polyethersulfone Membrane for Effective Salt Rejection

Development of ZSM-22/Polyethersulfone Membrane for Effective Salt Rejection

Recovery of rare earth elements from electronic waste by diffusion dialysis

Molecular dynamics simulation for investigating and assessing reaction conditions between carboxylated polyethersulfone and polyethyleneimine

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