Modification of polysulfone membranes

Gancarz, Irena; Poźniak, Gryzelda; Bryjak, Marek

doi:10.1016/s0014-3057(99)00240-2

Cited by 121 publications

(89 citation statements)

References 22 publications

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“…Polysulfone (PSU) membranes from Udel P-1700 (Amoco, Co., USA) were prepared as previously described [1]. Gel membranes were cast from 20% DMF or CHCl 3 (for FTIR technique) solution onto glass plates and dried 6 h at 120 8 C. Porous ultrafiltration membranes were prepared by the phase inversion method from 15 wt.-% solution of PSU in DMF with 10 wt.-% (refering to PSU) of polyvinylpyrrolidone (M = 10 000) and water as a coagulation bath.…”

Section: Membranesmentioning

confidence: 99%

“…Details of UF apparatus and procedure were described previously [1]. The UF charracteristics were determined with deionized water, buffer solutions (pH of 3 and 9) and buffered solutions of bovine serum albumin (BSA, 1 g/dm 3 in given pH).…”

Section: Ultrafiltration Properties and Pore Size Determinationmentioning

confidence: 99%

“…In the previous paper [1] CO 2 plasma modification of porous polysulfone membranes and the membrane performance in ultrafiltration of bovine serum albumin were described. It was shown that introduction of hydrophilic groups of acidic character onto the membrane surface improved greatly transport parameters of membrane.…”

Section: Introductionmentioning

confidence: 99%

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Modification of polysulfone membranes. 2. Plasma grafting and plasma polymerization of acrylic acid

Gancarz¹,

Poźniak

Bryjak

et al. 1999

Acta Polym.

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Polysulfone membranes were modified with acrylic acid using plasma initiated graft polymerization (both in solution and vapor phase) and plasma polymerization. Changes on the surface were monitored by contact angle measurements and FTIR‐ATR technique. Pore size and ultrafiltration properties were also evaluated. Grafting in solution gave as a result hydrophobic membranes with pore size diameter signficantly reduced. Such membranes lost their ultrafiltration properties. Grafting in vapor phase seems to give brush‐like structure. Membranes possess hydrophilic surface and unique filtration properties in basic environment. Plasma polymerization of acrylic acid on the PSU surface creates a layer of material highly reminding pure poly(acrylic acid). Performance of such membranes was also pH‐dependent showing better properties in basic solution.

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Section: Membranesmentioning

confidence: 99%

Section: Ultrafiltration Properties and Pore Size Determinationmentioning

confidence: 99%

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Modification of polysulfone membranes. 2. Plasma grafting and plasma polymerization of acrylic acid

Gancarz¹,

Poźniak

Bryjak

et al. 1999

Acta Polym.

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“…La aplicación de plasma como tratamiento es considerada como una técnica muy eficiente y amigable con el medio ambiente y se utiliza para modificar de forma controlada las propiedades de hidroficidad y de superficie, sin alterar las características de las películas [47][48][49][50].…”

Section: Plasmaunclassified

Modificaciones físicas, químicas y enzimáticas y sus efectos sobre las propiedades de las películas de quitosano

Valderrama

Albarracín

2014

Matéria (Rio J.)

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Modificaciones físicas, químicas y enzimáticas y sus efectos sobre las propiedades de las películas de quitosano.Physical, chemical and enzymatic modifications and their effects on the properties of chitosan films. RESUMENLas recientes investigaciones en el campo de biopolímeros han intentado brindar soluciones tecnológicas a los retos en el campo de la ciencia y la tecnología de los materiales. En los últimos años, se han llevado a cabo investigaciones con el objetivo de modificar las propiedades de películas empleando tratamientos enzimáticos y físicos, tales como la aplicación de radiaciones, pulsos eléctricos, plasma, tratamientos térmicos, uso de fluidos supercríticos, así como la conformación de películas en multicapas. Estas modificaciones cambian las propiedades antimicrobianas, físicas y químicas de las películas de quitosano y permiten desarrollar una extensa cantidad de aplicaciones en los campos de biomedicina, farmacología, biotecnología y en la industria de cosméticos y de alimentos. El objetivo del presente artículo de revisión es dar a conocer los nuevos avances en el campo de modificaciones físicas y enzimáticas de películas de quitosano explicando diferentes técnicas empleadas en los últimos años.Palabras clave: quitosano, polímeros, películas modificadas, aditivos alimenticios. ABSTRACTRecent research on biopolymer has focused its efforts to provide technological solutions to current and future challenges in the field of science and technology of materials. The properties of chitosan films have been modified by enzymatic and physical treatments such as the application of radiation, electric pulses, plasma, heat treatments, use of supercritical fluids as well as the formation of multilayer films. These modifications change antimicrobial, physical and chemical properties of chitosan films, and allow developing a wide range of applications in the fields of biomedicine, pharmacology, biotechnology, cosmetic and food industries. The purpose of this review is to present new developments in the field of physical and enzymatic modifications of chitosan films describing the different techniques carried out on the last years.

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“…Low-temperature plasma treatment with non-polymer-forming gases has been used in recent years as a useful tool to modify the surface properties of different materials, including PSf porous membranes [9][10][11][12][13][14][15][16][17][18][19]. Plasma allows to improve adhesion or wettability, as it generates the active species, capable of activating the upper surface molecular layers without involving the polymer bulk.…”

Section: Introductionmentioning

confidence: 99%

Development of Polysulfone Hollow Fiber Porous Supports for High Flux Composite Membranes: Air Plasma and Piranha Etching

Borisov

Ovcharova

Bakhtin

et al. 2017

Fibers

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For the development of high efficiency porous supports for composite membrane preparation, polysulfone (PSf) hollow fiber membranes (outer diameter 1.57 mm, inner diameter 1.12 mm) were modified by air plasma using the low temperature plasma treatment pilot plant which is easily scalable to industrial level and the Piranha etch (H 2 O 2 + H 2 SO 4 ). Chemical and plasma modification affected only surface layers and did not cause PSf chemical structure change. The modifications led to surface roughness decrease, which is of great importance for further thin film composite (TFC) membranes fabrication by dense selective layer coating, and also reduced water and ethylene glycol contact angle values for modified hollow fibers surface. Furthermore, the membranes surface energy increased two-fold. The Piranha mixture chemical modification did not change the membranes average pore size and gas permeance values, while air plasma treatment increased pore size 1.5-fold and also 2 order enhanced membranes surface porosity. Since membranes surface porosity increased due to air plasma treatment the modified membranes were used as efficient supports for preparation of high permeance TFC membranes by using poly[1-(trimethylsilyl)-1-propyne] as an example for selective layer fabrication.

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Modification of polysulfone membranes

Cited by 121 publications

References 22 publications

Modification of polysulfone membranes. 2. Plasma grafting and plasma polymerization of acrylic acid

Modification of polysulfone membranes. 2. Plasma grafting and plasma polymerization of acrylic acid

Modificaciones físicas, químicas y enzimáticas y sus efectos sobre las propiedades de las películas de quitosano

Development of Polysulfone Hollow Fiber Porous Supports for High Flux Composite Membranes: Air Plasma and Piranha Etching

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