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Evaluation and correlation of electrochemical and mechanical properties of PVA/SA nanofibres
Author(s) -
Covelo Alba,
Rodil Sandra,
LópezVillegas Edgar Oliver,
Álvarez Carlos Andrés,
Hernandez Miguel
Publication year - 2020
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6768
Subject(s) - vinyl alcohol , x ray photoelectron spectroscopy , dielectric spectroscopy , materials science , chemical engineering , ultimate tensile strength , transmission electron microscopy , electrochemistry , composite material , scanning electron microscope , dielectric , chemistry , electrode , nanotechnology , polymer , optoelectronics , engineering
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.