7 Preparation and characterization of polysaccharides/PVA blend nanofibrous membranes by electrospinning method

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Carla Santos (Author) Other; Carla J Silva (Author) Other; Zsofia Buettel (Author) Other; Rodrigo Guimaraes (Author) Other; Sara B Pereira (Author) Other; Paula Tamagnini (Author) FCUP; Andrea Zille (Author) Other

Journal

Title: Carbohydrate Polymers

Vol. 99

Pages: 584-592

ISSN: 0144-8617

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 142 Citations

Scopus - 150 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-008-E1F

DOI: 10.1016/j.carbpol.2013.09.008

Abstract (EN): 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 degrees 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9