Poly(butylene adipate-co-terephthalate)/Poly(lactic acid) Polymeric Blends Electrospun with TiO2-R/Fe3O4 for Pollutant Photodegradation

Abstract

This work aimed to use the electrospinning technique to obtain PBAT/PLA polymer fibers, with the semiconductors rutile titanium dioxide (TiO2-R) and magnetite iron oxide (Fe3O4), in order to promote the photocatalytic degradation of environmental contaminants. The parameters used in the electrospinning process to obtain the fibers were distance from the needle to the collecting target of 12 cm, flow of 1 mL h−1 and voltage of 14 kV. The best mass ratio of semiconductors in the polymeric fiber was defined from a 22 experimental design, and the values obtained were 10% TiO2-R, 1% Fe3O4 at pH 7.0. Polymer fibers were characterized by Scanning Electron Microscopy (SEM), Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA) and Fourier Transform Infrared (FTIR) techniques. SEM measurements indicated a reduction in fiber diameter after the incorporation of semiconductors; for the PBAT/PLA fiber, the average diameter was 0.9466 ± 0.2490 µm, and for the fiber with TiO2-R and Fe3O4 was 0.6706 ± 0.1447 µm. In the DSC, DRX, TGA and FTIR analyses, it was possible to identify the presence of TiO2-R and Fe3O4 in the fibers, as well as their interactions with polymers, demonstrating changes in the crystallinity and degradation temperature of the material. These fibers were tested against Reactive Red 195 dye, showing an efficiency of 64.0% within 24 h, showing promise for photocatalytic degradation of environmental contaminants.

Two Degrees of Freedom in Two Directions Structure Triboelectric Nanogenerator for Vibration Energy Harvesting and Self-Powered Sensing

“…The bands are presented for the ester group for PBAT at 1268, 1164, and 1120 cm –1 and for PLA at 1101 cm –1 . In addition, another characteristic band is the carbonyl of polymers, which is presented for PBAT and PLA at 1712 and 1751 cm –1 , respectively . To further improve the electrical output, a PI film was added between the PBAT + PLA film and the Cu film as a charge storage layer, and both the PBAT+PLA film and Cu film were polished with 2000 grit sandpaper.…”

“…In addition, another characteristic band is the carbonyl of polymers, which is presented for PBAT and PLA at 1712 and 1751 cm −1 , respectively. 43 To further improve the electrical output, a PI film was added between the PBAT + PLA film and the Cu film as a charge storage layer, 44 and both the PBAT+PLA film and Cu film were polished with 2000 grit sandpaper. The scanning electron microscopy (SEM) images of the linear microstructures 45 on PBAT + PLA film and Cu film surfaces are shown in Figure 1b(i,ii).…”

Electrospinning in personal protective equipment for healthcare work

“…The use of polymeric matrices in electrospinning is found in a wide range of technological applications, showing great results and future ambitions [ 47 ]. Recent studies show some possibilities for the application of electrospinning, in the use of filters for air purification [ 48 , 49 ], in the electrochemistry field [ 50 , 51 ], catalysis [ 52 , 53 ], tissue engineering [ 54 , 55 ], biomedicine [ 56 , 57 ], and in manufacture of protective clothing [ 58 , 59 ].…”

Styrene–butadiene–styrene-based stretchable electrospun nanofibers by carbon nanotube inclusion

“…[4][5][6][7][8] Electrospun polymer nanofibers can be used in sensor applications as their effective sensing surface area increases with decreasing fiber diameter. [9][10][11][12] The tunable polymer composite chemistry and functionality of the fiber material allow for exploring different applications, i.e., filtration media for wastewater management, 13 photocatalytic degradation of pollutants, 14 fire protection materials, 15 volatile organic compounds and oxidative gases. 16 Recent progress in electrospun nanomaterials includes more sensitive and selective nanosensors for acoustic waves and resistive, photoelectric, optical, and amperometric types.…”