Preparation and properties of novel pH-stable TFC membrane based on organic–inorganic hybrid composite materials for nanofiltration

Zhang, Yang; Guo, Min; Pan, Guoyuan; Yan, Hao; Xu, Jian; Shi, Yuanteng; Shi, Hongwei; Liu, Yiqun

doi:10.1016/j.memsci.2014.12.011

Cited by 51 publications

(14 citation statements)

References 33 publications

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“…This could partly be attributed to the change of surface morphology of the membranes [ 30 ], as shown in Figure 4 . Previous studies already proved that the hydrophilicity of membranes plays an important role in water transport resistance in NF separation [ 31 ]. The dynamically-assembled membranes are expected to provide improved flux and antifouling performance [ 32 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking

et al. 2019

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In recent decades, the advancements in layer-by-layer (LBL) assembly technology have provoked increasing interest in the preparation of multilayer polyelectrolyte membranes with excellent performance. In the current study, a novel nanofiltration (NF) membrane was prepared by pressure-driven layer-by-layer (LBL) assembly of polyethylenimine (PEI) and polyacrylicacid (PAA) on a porous substrate with chemical crosslinking. The effect of deposition pressure on separation performance of the prepared membranes was studied. The surface morphology, hydrophilicity and the charge property of the dynamically-deposited membranes were compared with those prepared by static adsorption. The characterization results showed that dynamic deposition process resulted in a smoother membrane surface with improved hydrophilicity. The mechanism of water-path formation was proposed to interpret the effect of pressure on the membrane performance. Glutaraldehyde (GA) was used as a crosslinker to reduce the number of polyelectrolyte bilayers for obtaining good separation performance. The rejections of different inorganic salts of the dynamically-deposited NF membrane were also investigated.

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Section: Resultsmentioning

confidence: 99%

Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking

et al. 2019

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“…Zhang et al studied the GO effect on the phase inversion process of the coagulation bath on morphology, surface properties, mechanical strength, and separation properties of prepared membranes. The results proved that increment in the amount of GO in the membrane structure significantly enhanced the amount of flux passing through the membrane, the mechanical strength and the separation properties 1 . Zeinadini et al evaluated the performance of nanofiltration membranes using GO nanoparticles.…”

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confidence: 83%

Effect of graphene oxide on modifying polyethersulfone membrane performance and its application in wastewater treatment

Marjani

Nakhjiri

Adimi

et al. 2020

Sci Rep

151

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In the present paper, Graphene Oxide (GO) particles were prepared via Hummer method, and used in synthesis of composite membranes. Polyethersulfone (PES) nanocomposite membranes were synthesized via wet phase inversion technique, and using water as non-solvent. The membrane morphology was investigated using scanning electron microscopy (SEM). Change in the membrane surface hydrophilicity after modification was studied using contact angle measurements. The performance of fabricated PES nanocomposite membranes was measured by evaluating pure water flux, salt rejection, dye retention and heavy metals removal. The results indicated that by increasing the filler percentage up to 5 wt.%, the contact angle between the water droplet and the membrane surface was decreased and the droplet was more dispersed on the membrane surface which implies higher hydrophilicity of the prepared nanocomposite membranes. Moreover, the experimental results corroborated that addition of GO to the membrane significantly improved the pure water flux, salt rejection and heavy metals removal, and can be used as a novel methodology for preparation of high performance membranes in water treatment. Over the last decades, substantial development in chemical industries has eventuated in an increment in the processing speed and a reduction in energy consumption 1. It has been recognized that separation and purification of different materials is one of the most significant techniques in chemical and biochemical engineering which has major contribution to total processing costs 2-6. In order to implement the industrial processes, raw material components must be separated and the obtained products should be purified as well. On the other hand, in the majority of chemical industries, the requirement of separation procedures seems to be unavoidable to efficiently manage the deleterious impressions of greenhouse gases on environment 7-9. In this regard, membranes have been developed for the efficient separation and purification of various types of materials in solid, liquid and gas states. Although the membrane separation procedure is more recent than distillation, adsorption, crystallization and liquid-liquid extraction, significant advancements have been observed in its application over the past two decades due to the efficiency and ease of operation 4,5,10-17. Both polymeric and inorganic membranes have been developed for the purpose of separation and reaction. Polysulfone-based membranes such as Polyethersulfone (PES) are utilized for the fabrication of nanofiltration membranes because of their outstanding mechanical/thermal resistance, chemical compatibility and stability over an extensive range of pH 18. The main disadvantage of the PES membranes is its intrinsic hydrophobic nature. Due to the absorption of organic impurities, these membranes are susceptible to fouling and blockage which leads

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“…The typical absorption peaks observed at 1018 cm −1 can be mainly attributed to the stretching vibration of Si-O-Si or C-O-Si formed during sol-gel process[38].The effect of oxidation on -SH groups can be reflected from the comparison of IR spectra between membrane M4B2 and M4B2-X. Presence of -SH groups at 1186 cm −1 have been suppressed after the oxidation.…”

mentioning

confidence: 97%

“…Peak at 1186 cm −1 is attributed to the bending vibration of -SH groups of M4B2, but their asymmetrical vibrations are insignificant around 2500 -2800 cm -1[38]. The typical absorption peaks observed at 1018 cm −1 can be mainly attributed to the stretching vibration of Si-O-Si or C-O-Si formed during sol-gel process[38].The effect of oxidation on -SH groups can be reflected from the comparison of IR spectra between membrane M4B2 and M4B2-X.…”

mentioning

confidence: 98%

Crosslinked PVA-based hybrid membranes containing di-sulfonic acid groups for alkali recovery

Dai

Mondal

et al. 2017

Separation and Purification Technology

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Preparation and properties of novel pH-stable TFC membrane based on organic–inorganic hybrid composite materials for nanofiltration

Cited by 51 publications

References 33 publications

Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking

Preparation of Layer-by-Layer Nanofiltration Membranes by Dynamic Deposition and Crosslinking

Effect of graphene oxide on modifying polyethersulfone membrane performance and its application in wastewater treatment

Crosslinked PVA-based hybrid membranes containing di-sulfonic acid groups for alkali recovery

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