Basic Principles of Membrane Technology

Mulder, M.H.V.

doi:10.1007/978-94-009-1766-8

Cited by 2,313 publications

(1,739 citation statements)

References 13 publications

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“…Flat sheet polysulfone-based membranes were prepared by phase inversion method via immersion precipitation in water coagulation bath as reported in literature [27][28][29] . Several polysulfone solutions were prepared by dissolving a measured amount of polymer (16 wt %) in NMP at room temperature.…”

Section: Membrane Preparationmentioning

confidence: 99%

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

et al. 2017

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Polymer solutions of polysulfone (PSf) and methylcellulose (MC) in 1-methyl-2-pyrrolidone (NMP) were used to prepare ultrafiltration membranes by the phase inversion technique via immersion precipitation. The effect of MC additive on the structure and performances of the membranes was studied. The obtained membranes were characterized by scanning electron microscopy (SEM), differential scanning calorimetry (DSC), infrared spectroscopy (FTIR-ATR), equilibrium water content (EWC), water contact angle, porosity and ultrafiltration experiments of polyethylene glycol solutions. It was found that all the PSf/MC membranes had higher porosity, more hydrophilic surface and more vertically finger like pores than PSf membrane. With an increase in MC content in the casting solution from 0.5% to 1.5%, the hydraulic permeability increases from 17.17 to 118.46 L.m -2 .h -1 .bar -1 , while the rejection decreases from 91.82% to 64.45% with PEG 35000. DSC scan and FTIR analysis confirmed that methylcellulose was trapped in the membranes matrix.

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Section: Membrane Preparationmentioning

confidence: 99%

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

et al. 2017

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“…[1][2][3][4] In some cases, composite membranes with complex fabrication processes, where the porous support and dense layer must be made in different steps, are justified (e.g., when the raw materials are expensive 5 or when such membranes have superior performance 6 ). Nonetheless, most high-performance membranes found in scientific literature have not succeeded commercially because of the complexity of their fabrication processes or the inefficient use of expensive materials.…”

Section: Textmentioning

confidence: 99%

Complexation-Induced Phase Separation: Preparation of Composite Membranes with a Nanometer-Thin Dense Skin Loaded with Metal Ions

2015

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We present the development of a facile phaseinversion method for forming asymmetric membranes with a precise high metal ion loading capacity in only the dense layer. The approach combines the use of macromolecule-metal intermolecular complexes to form the dense layer of asymmetric membranes with nonsolvent-induced phase separation to form the porous support. This allows the independent optimization of both the dense layer and porous support while maintaining the simplicity of a phase-inversion process. Moreover, it facilitates control over (i) the thickness of the dense layer throughout several orders of magnitude from less than 15 nm to more than 6 μm, (ii) the type and amount of metal ions loaded in the dense layer, (iii) the morphology of the membrane surface, and (iv) the porosity and structure of the support. This simple and scalable process provides a new platform for building multifunctional membranes with a high loading of well-dispersed metal ions in the dense layer.

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“…The membranes have a high thermal and chemical stability and a high permeability to small gas molecules like hydrogen and water. [7] Both mesoporous (pore diameter 2-50 nm) [8] and microporous (pore diameter < 2 nm) [8] ceramic membranes can be used for CO 2 separation, [9,10] and the use of chemically modified mesoporous membranes was also demonstrated recently. [11] However, the highest separation selectivities have been obtained in the microporous regime, where the width of the pores is comparable to the molecular size of the permeating species.…”

Section: Introductionmentioning

confidence: 99%

Microporous Niobia–Silica Membrane with Very Low CO₂ Permeability

et al. 2008

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A sol–gel‐derived microporous ceramic membrane with an exceptionally low permeability for CO2 from gaseous streams was developed and characterized. The sols were prepared from a mixture of niobium and silicon alkoxide precursors by acid‐catalyzed synthesis. Microporous films were formed by coating asymmetric γ‐alumina disks with the polymeric sol (Si/Nb=3:1), followed by calcination at 500 °C. The membrane consists of a 150‐nm‐thick layer with a Si/Nb atomic ratio of about 1.5. The single‐gas permeance of small gas molecules such as H2, CH4, N2, and SF6 decreases steadily with kinetic diameter. Hydrogen, helium, and carbon dioxide follow an activated transport mechanism through the membrane. The permeance of CO2 in this membrane is much lower than that in pure silica, and its behavior deviates strongly from the general trend observed with the other gases. This is attributed to a relatively strong interaction between CO2 and adsorption sites in the niobia–silica membrane.

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Basic Principles of Membrane Technology

Cited by 2,313 publications

References 13 publications

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Complexation-Induced Phase Separation: Preparation of Composite Membranes with a Nanometer-Thin Dense Skin Loaded with Metal Ions

Microporous Niobia–Silica Membrane with Very Low CO₂ Permeability

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Basic Principles of Membrane Technology

Cited by 2,313 publications

References 13 publications

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Effects of Methylcellulose on the Properties and Morphology of Polysulfone Membranes Prepared by Phase Inversion

Complexation-Induced Phase Separation: Preparation of Composite Membranes with a Nanometer-Thin Dense Skin Loaded with Metal Ions

Microporous Niobia–Silica Membrane with Very Low CO2 Permeability

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Microporous Niobia–Silica Membrane with Very Low CO₂ Permeability