Behavior of polysulfone composite and nanocomposite membranes under hypochlorite ageing

Polysulfone activated carbon or graphite composite membranes and polysulfone montmorillonite clay nanocomposite membranes were prepared by wet-phase inversion method. Its effectiveness against hypochlorite degradation by forming composite and nanocomposite structures was studied by means of an agein...

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Bibliographic Details
Published in:Materials research express 2018-05, Vol.5 (5), p.55006
Main Authors: Anadão, Priscila, de Santis, Henrique Souza, Montes, Rafael Rezende, Wiebeck, Hélio
Format: Article
Language:English
Subjects:
chemical ageing
composite/nanocomposite membranes
membrane
polysulfone
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Summary:Polysulfone activated carbon or graphite composite membranes and polysulfone montmorillonite clay nanocomposite membranes were prepared by wet-phase inversion method. Its effectiveness against hypochlorite degradation by forming composite and nanocomposite structures was studied by means of an ageing experiment. The formation of some fissures on the composite membrane surface was observed through electron micrographs scanning. The number-average molecular weight of the polysulfone of all membranes was reduced. This reduction was more noticeable in the composite membranes owing to the lower interaction between polymer chains and filler, such interaction being also the reason for polydispersity increase. Fourier transform infrared spectroscopy detected the reduction of the PSf bands in the nanocomposite membranes; in the composite membranes, some PSf band intensities were probably increased owing to the exposure of the PSf groups to the ageing process. All membranes presented brittleness with ageing, which was more pronounced in the composite membranes due to the membrane defects formed.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/aabf9c