Polysulfone

1 - 8 of 8 results

New type of hollow ﬁber membrane for cell and microorganisms cultivation and encapsulation A method of obtaining membranes with a developed inner wall structure has been worked-out by establishing appropriate spinning conditions. Obtaining a developed surface of membranes without interference into the spinneret structure is feasible. Membranes with a developed inner surface bear higher ul Desalination 240 (2009)
preparation and characterization of polysulfone support and sulfonated poly (ether ether ketone) coated composite hollow fiber membranes A supported liquid membrane (SLM) contains organic solvent and organic extractant as one organic phase, and a porous support structure. It has been widely investigated for separation and purification of various chemical compounds. SLM has high permeability and selectivity, being regarded as one of t Desalination 225 (2008)
Degradation of polysulfone membranes due to contact with bleaching solution An exposure to sodium hypochlorite produces chain breaking in the PSf molecules, which leads to changes to the membrane texture on the microscopic scale, and which is closely related to changes in the membrane mechanical properties. It has been shown that the mechanism Desalination 199 (2006)
Polysulfone coating with starch addition in CRF formulation Studies on the possibility of using of polysulfone as a coating for water soluble NPK granular fertilizer were performed. The coatings were formed from the polymer solutions by the phase inversion technique. The polymer concentration in the coating forming solution was 18 wt.%. As the polysulfone co Desalination 163 (2004)
Trade-off between thermodynamic enhancement and kinetic hindrance during phase inversion in the preparation of polysulfone membranes Polysulfone membranes were prepared via the diffusion-induced phase inversion process from casting solutions consisting of polysulfone, dimethyformamide, and polyvinyl pyrrolidone as a polymeric additive. The effect of PVP added in casting solutions was analyzed by measuring the prepared membranes’ Desalination 159 (2003)
The effect of sulfonated poly(ether ether ketone) additives on membrane formation and performance Sulfonated poly(ether ether ketone) (SPEEK), a strong polyelectrolyte, was investigated as an additive in polysulfone (PSU)/SPEEK/N-methyl-2-pyrrolidinone (NMP) systems. Membrane characterisation was carried out using filtration studies and by atomic force microscopy (AFM). The effect of SPEEK in th Desalination 145 (2002)
Polysulfone with lower levels of cyclic dimer: use of MALDITOF in the study of cyclic oligomers Solutions of polysulfone in certain solvents can become cloudy due to a slight and partial precipitation of a cyclic oligomer, which has been characterized to be crystalline cyclic dimer of polysulfone containing two repeat units of polysulfone. This precipitation has been a source of manufacturing Desalination 144 (2002)
From ultrafiltration to nanofiltration hollow fiber membranes: a continuous UV-photografting process A new way to prepare nanofiltration membranes, consisting of in-line external modification of the skin of a polysulfone ultrafiltration hollow fibre skin, is described. The paper presents a continuous process (dip-coating followed by photografting) and the influence of the operating conditions on th Desalination 144 (2002)

New type of hollow ﬁber membrane for cell and microorganisms cultivation and encapsulation

A method of obtaining membranes with a developed inner wall structure has been worked-out by establishing appropriate spinning conditions. Obtaining a developed surface of membranes without interference into the spinneret structure is feasible. Membranes with a developed inner surface bear higher ul

Desalination 240 (2009)

preparation and characterization of polysulfone support and sulfonated poly (ether ether ketone) coated composite hollow fiber membranes

A supported liquid membrane (SLM) contains organic solvent and organic extractant as one organic phase, and a porous support structure. It has been widely investigated for separation and purification of various chemical compounds. SLM has high permeability and selectivity, being regarded as one of t

Desalination 225 (2008)

Degradation of polysulfone membranes due to contact with bleaching solution

An exposure to sodium hypochlorite produces chain breaking in the PSf molecules, which leads to changes to the membrane texture on the microscopic scale, and which is closely related to changes in the membrane mechanical properties. It has been shown that the mechanism

Desalination 199 (2006)

Polysulfone coating with starch addition in CRF formulation

Studies on the possibility of using of polysulfone as a coating for water soluble NPK granular fertilizer were performed. The coatings were formed from the polymer solutions by the phase inversion technique. The polymer concentration in the coating forming solution was 18 wt.%. As the polysulfone co

Desalination 163 (2004)

Trade-off between thermodynamic enhancement and kinetic hindrance during phase inversion in the preparation of polysulfone membranes

Polysulfone membranes were prepared via the diffusion-induced phase inversion process from casting solutions consisting of polysulfone, dimethyformamide, and polyvinyl pyrrolidone as a polymeric additive. The effect of PVP added in casting solutions was analyzed by measuring the prepared membranes’

Desalination 159 (2003)

The effect of sulfonated poly(ether ether ketone) additives on membrane formation and performance

Sulfonated poly(ether ether ketone) (SPEEK), a strong polyelectrolyte, was investigated as an additive in polysulfone (PSU)/SPEEK/N-methyl-2-pyrrolidinone (NMP) systems. Membrane characterisation was carried out using filtration studies and by atomic force microscopy (AFM). The effect of SPEEK in th

Desalination 145 (2002)

Polysulfone with lower levels of cyclic dimer: use of MALDITOF in the study of cyclic oligomers

Solutions of polysulfone in certain solvents can become cloudy due to a slight and partial precipitation of a cyclic oligomer, which has been characterized to be crystalline cyclic dimer of polysulfone containing two repeat units of polysulfone. This precipitation has been a source of manufacturing

Desalination 144 (2002)

From ultrafiltration to nanofiltration hollow fiber membranes: a continuous UV-photografting process

A new way to prepare nanofiltration membranes, consisting of in-line external modification of the skin of a polysulfone ultrafiltration hollow fibre skin, is described. The paper presents a continuous process (dip-coating followed by photografting) and the influence of the operating conditions on th

Desalination 144 (2002)

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