Evaluation and correlation of electrochemical and mechanical properties of PVA/SA nanofibres
Por:
Covelo, Alba, Rodil, Sandra, López-Villegas E.O., Álvarez C.A., Hernandez, Miguel
Publicada:
1 dic 2020
Ahead of Print:
1 ene 2020
Resumen:
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. © 2020 John Wiley & Sons, Ltd.
Filiaciones:
Covelo, Alba:
División de Ingeniería Mecánica e Industrial, (DIMEI), CENISA, Facultad de Ingeniería, UNAM, Mexico City, Mexico
Univ Nacl Autonoma Mexico, Div Ingn Mecan & Ind, Fac Ingn, CENISA,DIMEI, Mexico City 04510, DF, Mexico
Rodil, Sandra:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City, Mexico
Univ Nacl Autonoma Mexico, Inst Invest Mat, Mexico City, DF, Mexico
López-Villegas E.O.:
Central de Microscopía, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Mexico City, Mexico
Álvarez C.A.:
Laboratorio de Biomateriales Dentales, Facultad de Odontología, Universidad Nacional Autónoma de México, Mexico City, Mexico
Hernandez, Miguel:
División de Ingeniería Mecánica e Industrial, (DIMEI), CENISA, Facultad de Ingeniería, UNAM, Mexico City, Mexico
Univ Nacl Autonoma Mexico, Div Ingn Mecan & Ind, Fac Ingn, CENISA,DIMEI, Mexico City 04510, DF, Mexico
Inst Politecn Nacl, Escuela Nacl Ciencias Biol, Cent Microscopia, Mexico City, DF, Mexico
Univ Nacl Autonoma Mexico, Fac Odontol, Lab Biomat Dent, Mexico City, DF, Mexico
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