Polysulfone/sulfonated polysulfone alloy membranes with an improved performance in processing mariculture wastewater

Song, Di; Xu, Jia; Fu, Yunpeng; Xu, Lei; Shan, Baotian

doi:10.1016/j.cej.2016.07.009

Cited by 81 publications

(38 citation statements)

References 37 publications

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“…Furthermore, up to a critical level of pressure, permeability reaches a roughly constant value, probably due to membrane densification. Pressure effect on the membrane permeability can demonstrate the mechanical strength of the prepared membranes; thus, hydrophobic membranes exhibit higher resistance to pressure . Moreover, unexpected increase in permeability for M VI , M VII , and M 7 membranes can be related to bursting strength and was observed perhaps because of created failure.…”

Section: Resultsmentioning

confidence: 96%

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Investigation of structure‐performance properties of a special type of polysulfone blended membranes

Mahmoudian

Kochameshki

Mahdavi

et al. 2018

Polymers for Advanced Techs

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Membranes require superior mechanical strength due to applied harsh conditions. The mechanical properties of membranes decrease with increasing hydrophilicity of its elements. In this study, mechanical properties were investigated for two special blended membranes which were made by blending polysulfone with (polysulfone-gpoly (n-butylacrylate) and polysulfone-g-poly (tert-butylacrylate) as components. All of the prepared membranes were characterized by differential scanning calorimeter, thermal gravimetric analysis, field emission scanning electron microscope, and atomic electron microscope and were investigated in terms of pure water flux, water contact angle, molecular weight cut off, and morphology. It was found that water contact angle decreased from 73.6°which belongs to neat membrane decreased to 46°for blended membranes containing higher amounts of copolymers; however, the pure water flux increased with increasing copolymer content considerably compared with the neat membrane. Also, molecular weight cut off increased aggressively. Furthermore, mechanical properties including tensile strength, Young modulus, and elongation at break were measured and compared with the neat polysulfone membrane.Results showed that the tensile strength and modulus decreased with an increase in the copolymers content, despite the increase in the elongation at break. The effect of applied pressure on the membrane structure and also bursting strength were studied, and it has been proved that not only the structure of the membranes but also their performance is strongly affected by the composition of the membranes.

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Section: Resultsmentioning

confidence: 96%

“…A common method of membrane modification is blending . Blends of polysulfone with a hydrophilic polymer provide compositions with improved hydrophilicity in comparison with neat polysulfone . The polymeric membrane is the most important part of membrane separation processes.…”

Section: Introductionmentioning

confidence: 99%

Investigation of structure‐performance properties of a special type of polysulfone blended membranes

Mahmoudian

Kochameshki

Mahdavi

et al. 2018

Polymers for Advanced Techs

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“…Wang et al have found that the introduction of pendent carboxylic acid group into poly(arylene ether ketone) copolymers could prepare good antifouling ultrafiltration membranes [20]. We can conclude form the above that the carboxylated materials not only possess good solubility and high hydrophilicity, but also have anti-swelling property and dimension stability, when compared with other hydrophilic materials, such as sulfonated polymers which are difficult to be dissolved in solvent and susceptible to swelling in water at high sulfonation degree [21,22]. Consequently, the fabrication of water purification membranes by using carboxylated phenolphthalein based poly (arylene ether ketone)s (PAEK) is very promising.…”

Section: Introductionmentioning

confidence: 80%

Tight ultrafiltration membrane: Preparation and characterization of thermally resistant carboxylated cardo poly (arylene ether ketone)s (PAEK-COOH) tight ultrafiltration membrane for dye removal

Liu

Mao

Zheng

et al. 2017

Journal of Membrane Science

122

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Cardo poly (arylene ether ketone)s bearing hydrophilic carboxylic acid groups (PAEK-COOH) was successfully synthesized by condensation polymerization of 2-[bis(4-hydroxyphenyl)methyl] benzoic acid and 4,4′-bisfluorodiphenylketone. TGA and DSC analyses demonstrated that the material has an initial decomposition temperature and glass transition temperature of 360 • C and 220 • C respectively, which revealed the excellent thermal stability of PAEK-COOH. Then PAEK-COOH was employed to fabricate tight ultrafiltration membrane by the nonsolvent induced phase inversion process (NIPS). The water contact angle of the prepared membrane is 61.5 o , indicating its good hydrophilicity. The PAEK-COOH tight ultrafiltration membrane possesses a pure water flux of 119.6  2.6 L m-2 h-1 , dye permeation flux of 100.9  4.3 L m-2 h-1 and rejection of 99.8  0.33% for Congo red at dye concentration of 100 ppm and operation pressure of 0.4 MPa. Membrane has a molecular weight cut off of 9260Da and gives complete penetration of monovalent inorganic salt NaCl but a slight rejection of divalent inorganic salt Na 2 SO 4 (less than 10%). Thus, the membrane could be used in the decolorization of wastewater or fractionation of dye

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“…Top layer thickness was increased with the increase in SPSf concentration up to 5 wt % and long finger‐like structure was suppressed. Since SPSf is more hydrophilic, PSf/SPSf blending system could tolerate a higher water content in the casting film, and hence, a longer time was required for the solvent and nonsolvent exchange . In addition, SPSf caused to increase the viscosity of the polymer dope leading to delayed demixing .…”

Section: Resultsmentioning

confidence: 99%

Layer‐by‐layer self‐assembly of multifunctional enzymatic UF membranes

Yürekli

2019

J of Applied Polymer Sci

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In order to eliminate membrane fouling and to ensure enzymatic hydrolysis of urea, multifunctional biocatalytic membranes were prepared by using urease (URE) and trypsin (TRY) enzymes on the sulfonated polysulfone (SPSf) ultrafiltration membrane via layer‐by‐layer (LbL) self‐assembly method. The membrane architecture consisted of multilayer assembly with TRY and URE enzymes as the outer layer and inner sandwiched layer, respectively. Polyethyleneimine (PEI) and alginate (ALG) were used as cationic and anionic polyelectrolytes. Sulfonation and PEI deposition were successfully accomplished as confirmed by attenuated total reflectance Fourier transform infrared spectroscopy, differential scanning calorimetry (DSC) and scanning electron microscopy analysis, contact angle measurements, staining with toluidine blue and Congo red dyes and dead‐end filtration experiments. A characteristic value of SPSf membrane with a high water permeability (1000 L/m2.h.bar) and 95% bovine serum albumin (BSA) rejection was observed. In static conditions, URE activities of SPSf2‐PEI‐URE membrane were not affected by BSA fouling, while TRY immobilizations with increased concentrations (SPSf2‐PEI‐URE‐PEI‐ALG‐TRY) significantly lowered the activity of URE. In dynamic conditions, each deposited layer exhibited individual resistance to flow that can be considered as irreversible fouling and caused 90% of flux decline for the SPSf2‐PEI‐URE‐PEI‐ALG‐TRY membrane assembly. The recovery of the initial flux for the multilayered membrane at the end of six fouling and washing cycles was observed 85%. Moreover, at the end of 5 cycles, 78% of the URE initial activity of the multilayered membrane was preserved. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48750.

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Polysulfone/sulfonated polysulfone alloy membranes with an improved performance in processing mariculture wastewater

Cited by 81 publications

References 37 publications

Investigation of structure‐performance properties of a special type of polysulfone blended membranes

Investigation of structure‐performance properties of a special type of polysulfone blended membranes

Tight ultrafiltration membrane: Preparation and characterization of thermally resistant carboxylated cardo poly (arylene ether ketone)s (PAEK-COOH) tight ultrafiltration membrane for dye removal

Layer‐by‐layer self‐assembly of multifunctional enzymatic UF membranes

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