Impact of the solvent composition on the structural and mechanical properties of customizable electrospun poly (vinylpyrrolidone) fiber mats

Abstract:

The performance of fibrous membrane composites fabricated via electrospinning is strongly influenced by the solution's properties, process variables and ambient conditions, although a precise mechanism for controlling the properties of the resulting composite has remained elusive. In this work, we focus on the fabrication of electrospun poly(vinylpyrrolidone) (PVP) fibers, by varying both the polymer concentration and the mixture of ethanol (EtOH) and dimethylformamide (DMF) used as solvent. The impact of the solvent composition on the structural properties is assessed by a combined experimental and theoretical approach, employing scanning electron microscopy (SEM), differential scanning calorimetry (DSC), rheology, Fourier-transform infrared spectroscopy (FTIR) and stress–strain curves obtained from tensile tests to characterize the fibrous membranes produced, and density functional theory (DFT …

Año de publicación:

2021

Keywords:

Fuente:

google