Preparation of PVDF/PVP blend polymer nanofiber films and application on screen-printed flexible electrodes.

[Display omitted] • We established the solid–liquid two-phase model of polymer and carbon paste and the solid–solid two-phase model of polymer and graphite. • The binding energy of different polymer mixtures with carbon paste and graphite was calculated. • The optimal polymer ratio 5PVDF + 5PVP was selected for the preparation of nanofiber film. Electrospinning technology was used to prepare a breathable ultra-thin polymer film. • Flexible screen printing electrode were prepared using nanofiber polymer film as substrate. The preparation of three electrodes (working electrode, counter electrode, reference electrode) on soft, deformable, and breathable film substrates with good adhesion is a novel approach for the development of wearable devices for plants. In this study, the adsorption energy of carbon paste, graphite, and a polymer was calculated via molecular dynamics simulations, and the optimal polymer ratio was selected for the preparation of nanofiber films. Electrospinning technology was used to prepare a breathable ultrathin polymer film, which was used as a flexible substrate for three electrodes, and a conductive carbon paste was patterned on the nanofiber film substrate by screen printing. The properties of the composite nanofiber membrane substrate and flexible screen-printing electrode were studied by scanning electron microscopy (SEM), infrared (IR) spectroscopy, X-ray diffraction (XRD), 3D profile scanning, and electrochemical experiments. The combination of electrospinning technology and screen-printing technology is a new path for the preparation of nondestructive and wearable detection devices. [ABSTRACT FROM AUTHOR]