Antibacterial, antioxidant and barrier properties of clay-doped electrospun fibers

Abstract

Nowadays, packaging technologies have been extensively developed, including active and intelligent packages able to promote quality, safety, and the product shelf life. At this purpose, the aim of the study was focused on the design and development of polyvinyl alcohol-based nanofibers doped with two natural clays, montmorillonite or clinoptilolite, and loaded with chlorogenic acid, as nanofibrous membranes to control microbial contamination and oxidative state upon direct contact. The results showed that the 1 % w/w clay doping was the optimal concentration to obtain continuous and uniform nanofibers. In addition, chlorogenic acid loading (5 % w/w) into the nanofibers did not change the systems morphology, resulting in a chlorogenic acid sustained release, achieving 100 % within 24 h for all the systems with enhanced antioxidant and antimicrobial activities. Depending on their structure, the presence of the clays mineral was able to affect the aqueous vapor permeability. These results suggested the promising applications of the clay doped polyvinyl alcohol-based nanofibrous membranes as smart advanced material able to control microbial contamination and oxidative degradation to be used in biomedical field or as active packaging.

Keywords

• Electrospun nanofibers
• Nanoclays
• Chlorogenic acid
• Barrier properties
• Antimicrobial properties