Characteristics and performance of PVDF membrane prepared by using NaCl coagulation bath: Relationship between membrane polymorphous structure and organic fouling

Zhang, Yang; Ye, Lin; Zhang, Bopeng; Chen, Yongsheng; Zhao, Weigao; Yang, Guang; Wang, Jie; Zhang, Hongwei

doi:10.1016/j.memsci.2019.02.054

Cited by 80 publications

(41 citation statements)

References 48 publications

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“…This paper presents a follow-up in depth investigation of the modification approach for design of antifouling ultrafiltration membranes via addition of polyelectrolyte to the coagulation bath proposed in our previous works [ 65 , 66 ]. It was established that additives to coagulation bath (salts [ 67 , 68 , 69 , 70 ], acids [ 71 , 72 ], bases [ 72 , 73 ], solvents [ 74 , 75 ], non-solvents [ 76 ]) during membrane preparation via non-solvent induced phase separation (NIPS) significantly influence the thermodynamics and kinetics of phase inversion. Additives to coagulation bath were found to adjust liquid-liquid demixing which leads to the substantial change of membrane structure and performance.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, adding solvent into the coagulation bath commonly was found to delay the demixing process which suppresses the formation of macrovoids and decreases membrane porosity resulting in the decline of permeability [ 75 ]. The influence of salt addition (KCl, NaCl, CaCl 2 ) to the aqueous coagulation bath using polyvinylchloride-N-methyl-2-pyrrolidone (NMP) and polyvinylidene fluoride (PVDF)-NMP casting solutions with Pluronic F127 or polyethylene glycol (M n = 12,000 g·mol −1 ) additives was studied [ 67 , 68 , 69 ]. Influence of NaCl, KCl and Na 2 SO 4 addition to the aqueous coagulation bath for membranes prepared from polysulfone (PSF)-polyethylene glycol (PEG, M n = 400 g·mol −1 )-NMP casting solution was also investigated [ 70 ].…”

Section: Introductionmentioning

confidence: 99%

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Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

et al. 2020

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Surface modification of polysulfone ultrafiltration membranes was performed via addition of an anionic polymer flocculant based on acrylamide and sodium acrylate (PASA) to the coagulation bath upon membrane preparation by non-solvent induced phase separation (NIPS). The effect of PASA concentration in the coagulant at different coagulation bath temperatures on membrane formation time, membrane structure, surface roughness, hydrophilic-hydrophobic balance of the skin layer, surface charge, as well as separation and antifouling performance was studied. Scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared (FTIR) spectroscopy, contact angle and zeta potential measurements were utilized for membrane characterization. Membrane barrier and antifouling properties were evaluated in ultrafiltration of model solutions containing human serum albumin and humic acids as well as with real surface water. PASA addition was found to affect the kinetics of phase separation leading to delayed demixing mechanism of phase separation due to the substantial increase of coagulant viscosity, which is proved by a large increase of membrane formation time. Denser and thicker skin layer is formed and formation of macrovoids in membrane matrix is suppressed. FTIR analysis confirms the immobilization of PASA macromolecules into the membrane skin layer, which yields improvement of hydrophilicity and change of zeta potential. Modified membrane demonstrated better separation and antifouling performance in the ultrafiltration of humic acid solution and surface water compared to the reference membrane.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

et al. 2020

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“…These improvements resulted in improved fouling resistance and higher rejection. Zhang, Ye, et al (2019) used newly developed hybrid membranes, graphene oxide (GO)/ covalently functionalized cellulose nanocrystal (CNC)/ nanocomposites modified PVDF exhibited an enhanced permselectivity with a water flux of 230 LMH/bar and humic acid rejection of 92%, the improved antibacterial activity (bacteriostasis rate of 93%) and antifouling performance (flux recovery rate (FRR) of >90%) being due to the optimized pore structure, higher surface roughness, incremental hydrophilicity and electronegativity. Hadi et al (2019) found that, due to the superhydrophilic nature of the nanocellulose, the contact angle of the barrier layer (20-28°) decreased rapidly with time and reached nearly zero after a few seconds, whereby the membrane flux were remarkably higher (52 LMH) than conventional polymeric membranes (4-14 LMH) at a very low transmembrane pressure of 0.5 psi.…”

Section: Membrane Coatingmentioning

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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“…In the study of modified composites, carbon black (CB) is one of the main fillers used to improve the piezoelectric and mechanical properties of composites. Batteries, sensors, and piezoelectric films all need composite materials with more stable storage, sensing, and other functions [1][2][3]. Xu et al [4]…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Analysis of Mechanical Properties of CB/SiO2/PVDF Composites

2020

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Damage is a key problem that limits the application of polymer membranes. In this paper, conductive carbon black (CB) and silicon dioxide (SiO2)-reinforced polyvinylidene fluoride (PVDF) composites were prepared using a solution mixing method. Through a uniaxial tensile test, the fracture and damage characteristics of the material were analyzed. When the structure had inevitable notch damage, changing the notch angle was very helpful for the material to bear more load. In addition, when there were two kinds of fillers in the PVDF matrix at the same time, there was an interaction between particles. The microstructure of the composite was characterized by scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), and thermogravimetric (TG) analysis. The experimental results indicate that, when the ratio of CB:SiO2:PVDF was 1:4:95, the general mechanical properties of the composite were the best.

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Characteristics and performance of PVDF membrane prepared by using NaCl coagulation bath: Relationship between membrane polymorphous structure and organic fouling

Cited by 80 publications

References 48 publications

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

Membrane processes

Comprehensive Analysis of Mechanical Properties of CB/SiO2/PVDF Composites

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