Estudo sobre a biocompatibilidade da polisulfona sob a forma de particulas e bastões

Pavanatti, Sergio Luiz; Zavaglia, Cecília A. C.; Belangero, William Dias; Kawano, Y.

doi:10.1590/s1413-78522001000300003

Cited by 1 publication

(1 citation statement)

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“…Ion-exchange membranes are an important technological tool in many applications, such as desalination, clean energy production, and chemical recovery. − These materials demand specific properties, such as high ion conductivity and selectivity, very good chemical and thermal stability, good mechanical properties, and low production cost. , It is common to use polymeric materials in order to achieve most of those requirements. Polysulfone (Psf), well-known for its outstanding chemical and thermal resistance and also mechanical strength, is a perfect base material for creating such membranes. , Moreover, it has been previously reported that Psf is a hydrophobic polymer, compatible with biomolecules such as tissues and blood proteins. − …”

Section: Introductionmentioning

confidence: 99%

Novel Biohybrid Polysulfone Membranes with Physically Immobilized Gramicidin for Ion-Exchange Applications

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Gumı́

2018

Ind. Eng. Chem. Res.

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The goal of this work was to design a system incorporating gramicidin (gA) into a polysulfone (Psf) membrane. The strategy involved immobilization of gA on the surface of two types of magnetite nanoparticles (MNPs) dispersed in a polymeric matrix. Membranes have been treated with surfactant Triton X100 (TRX) and surfactant/protein micelles (TRX/gA). MNP morphology was studied using transmission electron microscopy, and the chemical structure was confirmed by Fourier transform infrared analysis. Membrane morphology was observed under environmental scanning electron microscopy; water interactions were tested using static contact angle and water uptake, whereas ion transport was evaluated by means of a permeability test and current–voltage experiments. Depending on the type of nanoparticles used, immobilization led to either higher or lower membrane hydrophilicity but did not influence their morphology. Protein immobilization resulted in enhanced ion diffusion properties and membrane selectivity. This novel method of fabricating materials has a tremendous potential for use in ion-exchange applications, such as fuel cells or nanofiltration.

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