Characterization of active chitosan films as a vehicle of potassium sorbate or nisin antimicrobial agents

Remedio, Leandro Neodini; Santos, Jackson Wesley Silva dos; Maciel, Vinícius Borges Vieira; Yoshida, Cristiana Maria Pedroso; Carvalho, Rosemary Aparecida de

doi:10.1016/j.foodhyd.2018.09.012

Cited by 47 publications

(22 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a first approach, we can assume that the PWA 3− concentration distribution is homogeneous through the chitosan membrane, the solvent absorption and solute diffusion are simultaneous processes and the diffusivity is unidirectional and perpendicular to the surface of the Chit-PWA thin film (plausible for our high aspect ratio samples [45]). In these conditions, the PWA 3− diffusion inside the Chit-PWA hydrogel could be approximately determined by a simple semi-empirical equation derived from the one-dimensional Fick's second law of diffusion and commonly used in literature to describe the solute release in hydrogels [46,47], specifically in chitosan [48]:…”

Section: Monitoring the Big Reaction And The Prolonged Post-crosslinkmentioning

confidence: 99%

Ionotropic Gelation of Chitosan for Next-Generation Composite Proton Conducting Flat Structures

Bocchetta

2020

Molecules

View full text Add to dashboard Cite

(1) Background: Ionotropic gelation of cost-effective and eco-friendly biopolymer chitosan (Chit) is a novel and promising approach to the one-step synthesis of proton-conducting fuel cell bio-membranes.The method discovered by the author in 2011 and subsequently drowned among very few papers. This work aimed to relaunch this method through clear and effective communication of new unpublished results emphasizing the key aspects of this topic for successful dissemination of the results and significant future developments. (2) Methods and results: The mechanism of in-situ ionotropic gelation of Chit on an alumina substrate by phosphotungtate anions (PWA3−) was discussed and analyzed. The study sheds light on the effect of prolonged post-treatment in phosphotungstic acid (PWA) solution on the obtained chitosan/phosphotungstate (Chit-PWA) flat structures. Methods used included combined structural (XRD), thermal-gravimetric (DTG), electrochemical (in-situ EIS), compositional (EDX),morphological analysis (SEM), as well as the performances in a low temperature H2/O2 fuel cell(4) Conclusions: This contribution discloses novel possibilities aimed at increasing the impact of ionotropic gelation of chitosan on the scientific community working on the synthesis of novel proton conductive bio-composite membranes and structures.

show abstract

Section: Monitoring the Big Reaction And The Prolonged Post-crosslinkmentioning

confidence: 99%

Ionotropic Gelation of Chitosan for Next-Generation Composite Proton Conducting Flat Structures

Bocchetta

2020

Molecules

View full text Add to dashboard Cite

show abstract

“…This is due to the interactions between the chains of antimicrobial agents, which penetrate with ease into the film matrix. Consequently, there is greater mobility between the chains, producing films with lower TS and greater flexibility [16,17].…”

Section: Resultsmentioning

confidence: 99%

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

Liang

Ahmed

et al. 2019

Molecules

View full text Add to dashboard Cite

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.

show abstract

“…The results of the tensile strength test also showed that only PE-Gum-5 film was different from the control and the active films (except PE-Leaf-1 film), and its tensile strength was significantly lower than them (P < 0:05). Remedio et al [31] showed that the tensile strength of the chitosan films containing 10 mg polysorbate and nisin decreased 45.5% and 19.4%, respectively, comparing to the pure chitosan film, indicating a decrease in the chitosan resistance. The reason for this was attributed to the interactions of the antimicrobial compounds that could readily penetrate in the film matrix, resulting in the production of a film with less tensile strength and greater flexibility.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Low-Density Polyethylene Films Carrying ferula asafoetida Extract for Active Food Packaging: Thermal, Mechanical, Optical, Barrier, and Antifungal Properties

Niazmand¹,

Razavizadeh²,

Sabbagh

2020

Advances in Polymer Technology

View full text Add to dashboard Cite

The physical, thermal, mechanical, optical, microstructural, and barrier properties of low-density polyethylene films (LDPE) containing ferula asafoetida leaf and gum extracts were investigated. Results showed a reduction in elasticity and tensile strength with increasing extract concentration in the polymer matrix. The melting temperature and enthalpy increased with increasing concentration of extracts. The films containing extracts had lower L∗ and a∗ and higher b∗ indices. The films containing leaf extract had more barrier potential to UV than the gum extracts. The oxygen permeability in films containing 5% of leaf and gum extracts increased by 2.3 and 2.1 times, respectively. The morphology of the active films was similar to bubble swollen islands, which was more pronounced at higher concentrations of gum and leaf extracts. FTIR results confirmed some chemical interactions of ferula extracts with the polymer matrix. At the end of day 14th, the growth rate of Aspergillus niger and Saccharomyces cerevisea in the presence of the PE-Gum-5 reduced more than PE-Leaf-5 (3.7 and 2.4 logarithmic cycles, respectively) compared to the first day. Our findings showed that active LDPE films have desire thermo-mechanical and barrier properties for food packaging.

show abstract

Characterization of active chitosan films as a vehicle of potassium sorbate or nisin antimicrobial agents

Cited by 47 publications

References 49 publications

Ionotropic Gelation of Chitosan for Next-Generation Composite Proton Conducting Flat Structures

Ionotropic Gelation of Chitosan for Next-Generation Composite Proton Conducting Flat Structures

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

Low-Density Polyethylene Films Carrying ferula asafoetida Extract for Active Food Packaging: Thermal, Mechanical, Optical, Barrier, and Antifungal Properties

Contact Info

Product

Resources

About