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|Title:||Preparation and characterization of polysaccharides/PVA blend nanofibrous membranes by electrospinning method|
Silva, Carla J. S. M.
Pereira, Sara B.
|Keywords:||Polyvinyl alcohol (PVA)|
Extracellular polymeric substances (EPS)
|Citation:||Carla 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, http://dx.doi.org/10.1016/j.carbpol.2013.09.008.|
|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.|
|Appears in Collections:||DET/2C2T - Artigos em revistas internacionais com arbitragem científica|