Asymmetric polysulfone and polyethersulfone membranes: effects of thermodynamic conditions during formation on their performance

Barth, Cláudia; Gonçalves, Maria do Carmo; Pires, Alfredo T. N.; Roeder, Jerusa; Wolf, Bernhard

doi:10.1016/s0376-7388(99)00344-0

Cited by 313 publications

(167 citation statements)

References 11 publications

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“…Ismail & Hassan [15] also found the same finding in their study. Plus, this result could be strongly supported with Barth et al [16] where their study also shows the same result.…”

Section: Resultssupporting

confidence: 82%

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The effectiveness Study of Different Membranes in Treating Industrial Wastewater

et al. 2016

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Abstract. This paper focuses on the effectiveness study of different membranes in treating petroleum based wastewater. Polysulfone (PSF) and Polyether Sulfone (PES) were prepared using phase inversion method in NMP solvent. The composition of membrane was varied by manipulating the PVP additives concentration (5 wt%) in the membrane dope solution. The morphological study of prepared membranes was analysed using Field Emission Scanning Electron Microscope (FESEM) while the permeating flux and Chemical Oxygen Demand (COD) rejection rate were determined accordingly by using the refinery wastewater as the feed. The result found that the permeating flux increased as the operating pressure increased. However, for COD rejection, it was reported that only certain membrane show the best rejection. To clarify and support this finding, the membrane performance was further analyzed by determining the Total Dissolved Solid (TDS) rejection for PSF2 and PES2 membrane samples. The result showed that both membranes recorded relatively high TDS rejection which can be justified by the morphological studies of each samples. Therefore, this study proved that the membrane treatment have a high potential to treat the industrial wastewater for a larger scale.

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“…Ismail & Hassan [15] also found the same finding in their study. Plus, this result could be strongly supported with Barth et al [16] where their study also shows the same result.…”

Section: Resultssupporting

confidence: 82%

“…The reason for this finding could be credited to the thick sponge-like support layer of the PSF membrane which additionally permits the flux of bigger molecules. Besides, the different polarities of membrane material also could affect the membrane fluxes [16].…”

Section: Membrane Permeating Fluxmentioning

confidence: 99%

The effectiveness Study of Different Membranes in Treating Industrial Wastewater

et al. 2016

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“…Due to the higher volatility of acetone combined with good interaction with water, acetone is easily separated and evaporated from polysulfone solution. The rapid loss of acetone leads to a higher polymer concentration in the membrane skin layer and produces tight pore structures [29]. Error!…”

Section: Effect Of Presence Of Acetone On Hydrophilicity and Hydraulimentioning

confidence: 99%

The Influence of PEG400 and Acetone on Polysulfone Membrane Morphology and Fouling Behaviour

Aryanti

Joscarita

Wardani

et al. 2016

J. Eng. Technol. Sci.

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Abstract. Modification of polysulfone ultrafiltration membrane was conducted by blending polysulfone with PEG400 and acetone as additives. The influence of each additive on the resulted membrane morphology and fouling characteristics were investigated. The experimental results showed that the hydrophilicity of the polysulfone membrane was improved by the increase of PEG400 in the polysulfone membrane. The water contact angle of the membrane was decreased from 76.1° to 38.31° when 35 %wt of PEG400 was added into the polysulfone solution, while the water content of the membrane was increased by around 38%. The high concentration of PEG400 in the polysulfone solution led to the formation of longer finger-like cavities in the membrane structure and resulted in a thicker membrane skin layer. The high concentration of PEG400 also contributed to the increase in hydraulic resistance of the membrane due to organic matter fouling. This problem could be minimized by the addition of acetone into the polysulfone solution, which resulted in a lower fouling resistance of organic matter during up to five hours of peat water filtration.

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“…[4,5]. Entre esses materiais, a poliétersulfona (PES) é um dos materiais poliméricos mais importantes e é amplamente utilizado no campo da separação [6]. O PES apresenta várias características desejadas para o preparo das membranas, tais como: boa propriedade de barreira, química e resistência mecânica [7].…”

Section: Introductionunclassified

Membranas de poliétersulfona/argila e sua permeabilidade à água

Cavalho

Medeiros

Leite³

et al. 2017

Matéria (Rio J.)

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RESUMOMembranas podem ser consideradas películas poliméricas ou inorgânicas que funcionam como uma barreira semipermeável para uma filtração em escala molecular, separando duas fases e restringindo, total ou parcialmente, o transporte de uma ou várias espécies químicas (solutos) presentes na solução. Portanto, o objetivo deste trabalho é produzir membranas de poliétersulfona (PES) e poliétersulfona / argila pela técnica de inversão de fase e avaliar a presença de argila na obtenção de membranas para o tratamento de efluentes líquidos. O solvente utilizado foi a dimetilformamida (DMF) e argilas utilizadas foram Brasgel PA (MMT) e Cloisite Na (CL Na) nas proporções de 3 a 5% (em peso). Por difração de raios-X (DRX), as membranas com 3% das argilas MMT e CL Na aparentemente apresentaram estruturas parcialmente esfoliadas; para a composição com 5% de CL Na observou-se um pequeno pico, que indica que esta é, possivelmente, uma estrutura intercalada ou microcompósito. A partir dos resultados de microscopia eletrônica de varredura (MEV), visualizou-se que a superfície da membrana de PES puro apresentou uma estrutura aparentemente sem poros, no aumento utilizado e, uma superfície sem rugosidade quando comparada com às membranas com argila. As medidas de ângulo de contato indicaram que a inclusão da argila alterou a capacidade de molhamento das membranas. O fluxo com água destilada para todas as membranas iniciou alto e ao longo do tempo chegou a um patamar de estabilização. Assim, pôde-se concluir que a presença e o teor de argila alteraram a morfologia da membrana, contribuindo para um aumento do fluxo de água. Palavras-chave:Membranas, poliétersulfona, nanocompósitos, efluentes líquidos. ABSTRACTMembranes can be considered polymeric or inorganic films that function as a semipermeable barrier to filtration on a molecular scale, separating two phases and restricting, totally or partially, the transportation of one or more chemical species (solute) present in the solution. Therefore, the aim of this work is to produce polyethersulfone membranes (PES) and polyethersulfone/clay by phase inversion technique and evaluate the presence of clay in obtaining membranes for wastewater treatment. The used solvent was dimethylformamide (DMF) and clays were Brasgel PA (MMT) and Cloisite Na (CL Na) in the proportion of 3 to 5% (wt.). By Xray diffraction (XRD), the membranes with 3% of MMT and CL Na clays apparently had partially exfoliated structures. For the composition with 5% of CL Na a small peak was observed, which indicates that this is possibly an intercalated structure or microcomposite. By scanning electron microscopy (SEM), visualizes that the pure suface of the pure PES membrane a structure apparently without pores was observed in the used magnification and without roughness surface when compared to membranes with clay. The measurements of contact angle indicated that the inclusion of clay altered the wetting ability of the membranes. The flow with distilled water for all membranes started high and over time reached a stabi...

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Asymmetric polysulfone and polyethersulfone membranes: effects of thermodynamic conditions during formation on their performance

Cited by 313 publications

References 11 publications

The effectiveness Study of Different Membranes in Treating Industrial Wastewater

The effectiveness Study of Different Membranes in Treating Industrial Wastewater

The Influence of PEG400 and Acetone on Polysulfone Membrane Morphology and Fouling Behaviour

Membranas de poliétersulfona/argila e sua permeabilidade à água

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