Evaluation and correlation of electrochemical and mechanical properties of PVA/SA nanofibres. (10th March 2020)

• Record Type: Journal Article
• Authors: Covelo, Alba; Rodil, Sandra; López‐Villegas, Edgar Oliver; Álvarez, Carlos Andrés; Hernandez, Miguel
• Other Names: Oswald Steffen guestEditor.; Watts John F. guestEditor.; Abel Marie‐Laure guestEditor.
• Is Part Of: Surface and interface analysis. Volume 52:Number 12(2020)
• Page Start: 1128
• Page End: 1133
• Publication Date: 2020-03-10
• Subjects: characterization -- electrochemical impedance spectroscopy (EIS) -- electrospinning -- nanofibre -- sodium alginate; Surfaces (Physics) -- Periodicals; Surface chemistry -- Periodicals; Thin films -- Periodicals; 541.33
• DOI: 10.1002/sia.6768
• Languages: English
• ISSNs: 0142-2421

Abstract

Abstract : The present study evaluates and correlates the morphology of poly (vinyl alcohol) (PVA) and sodium alginate (SA) nanofibres with their internal structure to determine dielectric and tensile properties for future applications as long‐lasting and resistant cell scaffolds. This work generates electrospun nanofibres mixing SA concentration in a PVA solution cross‐linked in calcium chloride media. The dielectric properties of the nanofibres that were obtained using electrochemical impedance spectroscopy (EIS) show that at higher amount of SA in the PVA/SA fibres, the cross‐linking process occurs at shorter times, indicating the modification of the internal structure of the PVA/SA. The X‐ray photoelectron spectra (XPS) demonstrate that the chemical composition of the nanofibres varies depending on the depth profile. The transmission electron microscopy (TEM) proves that the PVA/SA is formed as a core‐shell coaxial nanofibre. The tensile testing demonstrates that with a higher SA concentration, the mechanical properties show brittleness.