Formation and Modification of Polymeric Membranes: Overview

Pinnau, Ingo; Freeman, Benny D.

doi:10.1021/bk-2000-0744.ch001

Cited by 89 publications

(53 citation statements)

References 37 publications

(46 reference statements)

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“…These gas fields contain large amounts of contaminating gases, mainly CO 2 [6][7][8]. The separation of CO 2 from CH 4 is important in * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Zeolite membrane for CO2 removal: Operating at high pressure

Sebastián

Kumakiri

Bredesen

et al. 2007

Journal of Membrane Science

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“…These gas fields contain large amounts of contaminating gases, mainly CO 2 [6][7][8]. The separation of CO 2 from CH 4 is important in * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

Zeolite membrane for CO2 removal: Operating at high pressure

Sebastián

Kumakiri

Bredesen

et al. 2007

Journal of Membrane Science

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“…1b & c. The changes in the morphology can be attributed and explained by changes in the properties of the membrane polymer by addition of PEI. During the membrane formation process, the structure of the membrane is generally determined by the instant of phase separation and the volumetric flow rate of the solvent and non solvent exchange compared to the vitrification rate [24].…”

Section: Resultsmentioning

confidence: 99%

Preparation and performance evaluation of poly (ether-imide) incorporated polysulfone hemodialysis membranes

et al. 2012

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Biocompatible Polysulfone (PSf) hemodialysis membranes were prepared by phase inversion technique using poly (ether-imide) (PEI) as the modification agent and Polyethylene glycol (PEG-200) as the pore former. The effect of PSf/PEI blend ratio on the morphology, hydrophilicity, water content, porosity, glass transition temperature, mechanical strength, biocompatibility and permeation rate of the prepared membranes were studied and were found to be improved significantly by the incorporation of PEI in the dope solution. The scanning electron microscopy (SEM) studies revealed that, incorporation of PEI resulted in the formation of spongy sub-layer and increased the connectivity of pores between sub-layer and bottom layer. The water content and permeation rate of the membranes of PSf/ PEI blend membranes were increased considerably indicating the enhancement of hydrophilicity and it was supported by lower contact angle values of the blend membranes. The existence of single well defined Tg over entire composition established the compatibility between the components in blend membranes. The biocompatibility of membranes was investigated through protein adsorption, platelet adhesion and thrombus formation on the membrane surface. Anticoagulant activity of PSf/PEI blend membranes was evaluated by measuring the activated partial thrombin time (APTT), prothrombin time (PT), thrombin time (TT) and fibrinogen time (FT). The results revealed that antithrombogenicity of PSf/PEI blend membranes was increased significantly. The efficiency of these membranes in removal of urea, creatinine and vitamin B 12 were studied and found to be improved for blend membranes. Thus, it is worth mentioning to note that, the biocompatible PSf/PEI blend membranes prepared in this study would offer immense potential in hemodialysis.

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“…Other than the selectivity and permeability, membranes are also required to be thin and low-cost, so these are also viable areas to work on. 14 …”

Section: Membrane Contactormentioning

confidence: 99%