Effect of Potassium Sorbate and Ultrasonic Treatment on the Properties of Fish Scale Collagen/Polyvinyl Alcohol Composite Film

Abstract

Composite films containing different amounts of potassium sorbate (KS) were prepared by using fish scale collagen (Col) and polyvinyl alcohol (PVA). Fourier transform infrared spectroscopy (FTIR), light transmittance, mechanical, water vapor transmission rate (WVTR), and the antibacterial properties of the composite films were analyzed. The results showed that the addition of Col significantly reduced the light transmittance of the composite film, but KS had no significant effect on the light transmission. The tensile strength decreased first and then increased with the addition of KS, while the WVTR increased first and then decreased. The composite film exhibited a certain degree of antibacterial properties against E. coli and S. aureus. In addition, we found that ultrasonic treatment reduced the WVTR, and also improved tensile strength and elongation at break of the composite films, but had no significant effect on other properties. The KS/Col/PVA films have the potential to be used as antimicrobial food packaging.

Ultrasound-assisted preparation of chitosan/nano-silica aerogel/tea polyphenol biodegradable films: Physical and functional properties

“…However, long-term intense ultrasonic treatment will destroy the structure of the polymer to a certain extent. Similarly, Liang et al [19] confirmed that with the increase of the ultrasonication time, the mechanical and barrier properties and of the film increased, but it has no significant effect on other properties. In addition, Liu et al [13] believed that ultrasonic treatment improved the barrier properties and degradability of polyvinyl alcohol (PVA)/TPs films, and the antibacterial rate of the films against E. coli and S. aureus was increased.…”

Packaging films based on biopolymers from seafood processing wastes: Preparation, properties, and their applications for shelf‐life extension of seafoods—A comprehensive review

“…Fish scale collagen (Col) and polyvinyl alcohol (PVA) containing varying amounts of potassium sorbate (KS) were used to prepare composite films. The KS/Col/PVA films were found to have antimicrobial properties to be employed in food packaging (Liang et al., 2019).…”

The Inhibitory Effect of Potassium Sorbate and Bifido-Bacterium on Shiga Toxin Producing E. coli in Kareish Cheese

“…It has been used since decades in the field of food technology and industry for its specific antifungal activities. Also, it can be used as a food additive for development of unique flavor of the food (Liang et al, 2019). However, the inhibitory effects of KS on shiga toxin producing E. coli are less informed.…”