Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/24762

TitleFabrication and characterization of PVA, PVA/chitosan, and PVA/cyanobacterial exopolysaccharide nanofibrous composite nanofiltration membranes prepared by electrospinning
Author(s)Santos, Carla
Silva, Carla J. S. M.
Guimarães, Rodrigo
Büttel, Zsófia
Tamagnini, Paula
Zille, Andrea
Issue date2013
PublisherACS
JournalAbstracts of Papers of the American Chemical Society
CitationSantos, Carla; Silva, Carla J.; Guimarães, Rodrigo; Büttel, Zsófia; Tamagnini, P.; Zille, Andrea. Fabrication and characterization of PVA, PVA/chitosan, and PVA/cyanobacterial exopolysaccharide nanofibrous composite nanofiltration membranes prepared by electrospinning, Trabalho apresentado em 245th ACS National Meeting and Exposition April 7-11, 2013, New Orleans, Louisiana, In ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, New Orleans, Louisiana, USA, 2013.
Abstract(s)A series of poly(vinyl alcohol) (PVA), PVA/chitosan (CS) and PVA/cyanobacterial exopolysaccharide (EPS) blend nanofibrous membranes were fabricated by electrospinning using a microfiltration poly(vinylidene fluoride) (PVDF) as a basal membrane, in order to obtain thin-layer composite (TFC) nanofiltration membranes. The morphology, diameter, structure, mechanical and thermal characteristics of electrospun nanofibers were investigated by atomic force microscopy (AFM), scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), dynamical and mechanical analysis (DMA), thermogravimetry (TGA) and differential scanning calorimetry (DSC). The morphology and diameter of the nanofibers were mainly affected by concentration of the blend solution and weight ratio of the blend, respectively. Thermal and mechanical analysis demonstrated that there were strong intermolecular hydrogen bonds between the molecules of CS-PVA and EPS-PVA in the blends. The heat-treated electrospun blended membranes showed better tensile mechanical properties when compared with PVA alone, and resisted more against disintegration. Nanofiltration was successfully performed in a high pressure cell.
TypeAbstract
URIhttp://hdl.handle.net/1822/24762
ISSN0065-7727
Peer-Reviewedyes
AccessOpen access
Appears in Collections:DET/2C2T - Comunicações em congressos internacionais com arbitragem científica

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