Synthesis of polyvinylidene fluoride (PVDF) membranes for protein binding: Effect of casting thickness

Ahmad, A.L.; Ideris, Norhidayah; Ooi, B. S.; Low, Siew Chun; Ismail, Asma

doi:10.1002/app.38522

Cited by 26 publications

(20 citation statements)

References 23 publications

(24 reference statements)

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“…Subsequently, a rapid phase separation takes place, and more porous membranes with larger pore sizes are created. From the kinetic point of view, many researchers indicated that increasing solution viscosity, as a result of the higher polymer concentration, prevents diffusion of nonsolvent through the cast film during the early part of phase separation, and this results in formation of smaller pores and fewer cavities.…”

Section: Resultsmentioning

confidence: 99%

Morphology and performance of poly(vinylidene fluoride) flat sheet membranes: Thermodynamic and kinetic aspects

Enayatzadeh

Mohammadi

2018

J of Applied Polymer Sci

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In this study, poly(vinylidene fluoride) (PVDF) membranes were prepared using two different solvents with various polymer concentrations to investigate the predominant kinetic or thermodynamic aspects of membrane preparation in a phase separation process. For this purpose, dimethyl sulfoxide (DMSO) as a weak solvent and N‐2‐methylpyrrolidone (NMP) as a strong solvent were used with polymer concentrations between 8 and 15 wt %. Scanning electron microscopy and water content, contact angle, and pore size measurements were used to assess the factors affecting the physicochemical properties of the prepared membranes. The results showed that in the case of NMP, the membrane structure is mainly controlled by thermodynamic parameters, while when using DMSO, kinetic parameters are predominant. According to the results, the prepared PVDF‐based membranes with DMSO exhibited a relatively denser top layer and less permeation compared to the NMP/PVDF membranes. The difference between the viscosities of the casting solutions with equal polymer concentrations in DMSO and NMP was considered to be the main effective factor in solvent/nonsolvent exchange, resulting in denser top layers in the DMSO/PVDF membranes. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46419.

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Section: Resultsmentioning

confidence: 99%

Morphology and performance of poly(vinylidene fluoride) flat sheet membranes: Thermodynamic and kinetic aspects

Enayatzadeh

Mohammadi

2018

J of Applied Polymer Sci

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“…The membrane fabrication technique employed in this study was phase inversion technique which has been discussed elsewhere in details [8]. A pre-determined amount of PES and additive (MnO 2 and PVP) were weighed and added to NMP solvent.…”

Section: Membrane Preparationmentioning

confidence: 99%

FABRICATION OF PES/MnO MIXED MATRIX MEMBRANES FOR CADMIUM REMOVAL

Lai

Chong

Kerk

et al. 2017

MJAS

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With increasing industrial activities around the globe, water source had been severely polluted by various heavy metal substances that lead to adverse effect not only to the environment but also to human being. The content of heavy metal in wastewater especially cadmium was increasing in the recent years and can be attributed to the strong demand of cadmium in the battery and electroplating industry. In this study, the potential of novel nanocomposite mixed matrix membrane incorporated with manganese oxide (MnO 2 ) nanoparticle for cadmium removal was investigated. The membranes were fabricated using polyethersulfone (PES) by phase inversion technique with different manganese oxide nanoparticle loading. Prior to performance evaluation, the membranes were characterized by their structural morphology, surface chemistry and cadmium adsorption capability. The results suggested that PES membrane incorporated with 2.0 ratio of MnO 2 /PES exhibited the best result in both cadmium adsorption (51.7 mg/g) and water permeability (1462 L/m 2 .h.bar). This indicated the prospect of this membrane to be applied in wastewater treatment industry.Keywords: mixed matrix membrane, polyethersulfone, cadmium, wastewater Abstrak Sumber air di seluruh dunia telah teruk tercemar dengan pelbagai bahan logam berat yang akan memberi kesan buruk kepada alam sekitar dan manusia. Pencemaran air ini adalah akibat daripada aktiviti-aktiviti perindustrian yang semakin pesat di dunia kita. Kandungan logam berat dalam air sisa terutamanya kadmium semakin meningkat dalam beberapa tahun ini disebabkan oleh permintaan kadmium yang tinggi terutamanya dalam industri bateri dan elektropenyaduran. Dalam kajian ini, potensi membran campuran matrik yang baharu dengan mangan oksida (MnO 2 ) dikajikan dalam sistem turas aliran lintang untuk penyingkiran kadmium. Membran ini dibuat daripada polietersulfona (PES) dengan teknik fasa berbalik dengan pelbagai berat zarah nano mangan oksida. Sebelum kajian dijalankan, membran dicirikan dengan kajian struktur dan permukaan morfologi, keliangan, sudut kenalan permukaan, kajian pembenaman MnO 2 dan kajian penjerapan kadmium. Hasil kerja kajian ini mencadangkan bahawa membran PES dengan nisbah 2.0 MnO 2 menunjukkan keputusan yang memberangsangkan dalam penjerapan kadmium (51.7 mg/g) dan fluks air tulen yang paling tinggi (1,462 L/m 2 .h.bar). Keputusan kajian ini telah menunjukkan membran mempunyai potensi yang besar digunakan dalam industri rawatan air sisa.Kata kunci: membran matriks campuran, polietersulfon, kadmium, air sisa

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“…Symmetrical, microporous PVDF membranes were prepared via non solvent-induced phase inversion according to a previously published method, with polymer concentrations of 13.0, 16.0, and 19 wt% (designated M1, M2 and M3 respectively) 15 . The casting process was performed at room temperature using an automatic fi lm applicator (Elcometer 4340 Motorised, Elcometer, UK) with an initial casting thickness of 500 μm and a casting speed of 30 mm/s.…”

Section: Membrane Preparationmentioning

confidence: 99%

Impact of membrane pore structure on protein detection sensitivity of affinity-based immunoassay

Ahmad

Ideris

Ooi

et al. 2016

Polish Journal of Chemical Technology

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Understanding a membrane's morphology is important for controlling its fi nal performance during protein immobilization. Porous, symmetric membranes were prepared from a polyvinylidene fl uoride/N-methyl-2-pyrrolidinone solution by phase inversion process, to obtain membrane with various microsized pores. The concentration and surface area of aprotein dotted on the membrane surface were measured by staining with Ponceau S dye. The dotted protein was further scanned and analysed to perform quantitative measurements for relative comparison. The intensity of the red protein spot and its surface area varied depending on the membrane pore size, demonstrating the dependence of protein immobilization on this factor. The membrane with the smallest pore size (M3) showed the highest protein spot intensity and surface area when examined at different protein concentrations. An increase in the applied protein volume showed a linearity proportional trend to the total surface area, and an uneven round dot shape was observed at a large applied volume of protein solution.

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Synthesis of polyvinylidene fluoride (PVDF) membranes for protein binding: Effect of casting thickness

Cited by 26 publications

References 23 publications

Morphology and performance of poly(vinylidene fluoride) flat sheet membranes: Thermodynamic and kinetic aspects

Morphology and performance of poly(vinylidene fluoride) flat sheet membranes: Thermodynamic and kinetic aspects

FABRICATION OF PES/MnO MIXED MATRIX MEMBRANES FOR CADMIUM REMOVAL

Impact of membrane pore structure on protein detection sensitivity of affinity-based immunoassay

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