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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

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

Revista

Título: Carbohydrate Polymers

Vol. 99

Páginas: 584-592

ISSN: 0144-8617

Editora: Elsevier

Indexação

ISI Web of Knowledge - 142 Citações

Scopus - 150 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9