Breathable Films with Self-Cleaning and Antibacterial Surfaces Based on TiO2-Functionalized PET Membranes

Abstract

A promising approach that uses the sol–gel method to manufacture new breathable active films with self-cleaning and antibacterial surfaces is based on the PET membranes obtained via ion track technology with a pore density of 10–7 cm−2 and a pore diameter of about 500 ± 15 nm, coated with a layer of TiO2 anatase, with a thickness of up to 80 nm. The formation of the photocatalytically active TiO2 anatase phase was confirmed using Raman analysis. Coating the PET membrane with a layer of TiO2 increased the hydrophobicity of the system (CA increased from 64.2 to 92.4, and the antibacterial activity was evaluated using Escherichia coli and Staphylococcus aureus bacteria with the logarithmic reduction factors of 3.34 and 4.24, respectively).

Progress in the Preparation and Application of Breathable Membranes

“…The PBAT/TPS films exhibited holes due to the incompatibility between the substances ( Figure 8 c). TiO 2 and ZnO are the most common additives used for self-cleaning and antibacterial surfaces [ 114 ]. The addition of ZnO nanoparticles promotes the formation of nanopores so that the film contains more pore space ( Figure 8 d).…”

Excited State Calculations of Cu-Doped Anatase TiO2 (101) and (001) Nanofilms

“…Although titanium dioxide has been the subject of wide experimental [9,[24][25][26][27][28][29][30] and theoretical [31][32][33][34][35] investigations, the full scope of its photocatalytic and antibacterial properties, as well as their potential enhancements, remains an open field for exploration. State-of-the-art spectroscopy can analyze electronic structure at the atomic scale, including binding energies [36,37] and imaging reaction sites [38].…”