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TitlePreparation and characterization of polysaccharides/PVA blend nanofibrous membranes by electrospinning method
Author(s)Santos, Carla
Silva, Carla J. S. M.
Büttel, Zsófia
Guimarães, Rodrigo
Pereira, Sara B.
Tamagnini, Paula
Zille, Andrea
KeywordsPolyvinyl alcohol (PVA)
Extracellular polymeric substances (EPS)
Chitosan (CS)
Issue date2014
JournalCarbohydrate Polymers
CitationCarla Santos, Carla J. Silva, Zsófia Büttel, Rodrigo Guimarães, Sara B. Pereira, Paula Tamagnini, Andrea Zille, Preparation and characterization of polysaccharides/PVA blend nanofibrous membranes by electrospinning method, Carbohydrate Polymers, Volume 99, 2 January 2014, Pages 584-592, ISSN 0144-8617,
Abstract(s)A series of polyvinyl alcohol (PVA), PVA/chitosan (CS) and PVA/cyanobacterial extracellular polymeric substances (EPS) blended nanofibrous membranes were produced by electrospinning using a microfiltration poly(vinylidene fluoride) (PVDF) basal membrane, for potential applications in water filtration. Nanofibres were obtained from solutions of 20% (w/w) PVA with 1% (w/w) CS or EPS, using a weight ratio of 60/40. Blended nanofibres have shown a smooth morphology, no beads formation and diameters between 50 and 130 nm. Thermo-mechanical analysis demonstrated that there were inter and/or intramolecular hydrogen bonds between the molecules of PVA/CS and PVA/EPS in the blends. The electrospun blended PVA/EPS membrane showed better tensile mechanical properties when compared with PVA and PVA/CS, and resisted more against disintegration in the temperature range between 10 and 50 °C. Finally, the blended membranes have shown an increase in chromium binding capacity of 5%. This is the first successful report of a blended membrane of electrospinned cyanobacterial polysaccharide with PVA.
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AccessOpen access
Appears in Collections:DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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