Gelatin films incorporated with thymol nanoemulsions: Physical properties and antimicrobial activities

Li, Xiuxiu; Yang, Xi; Deng, Hong; Guo, Yurong; Xue, Jinai

doi:10.1016/j.ijbiomac.2020.02.066

Cited by 130 publications

(76 citation statements)

References 38 publications

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“…Li et al [ 59 ] reported the barrier properties of gelatine films blended with lecithin and thymol with obtained WVP values between 7.19 ± 0.18 × 10 −11 and 10.09 ± 0.13 × 10 −11 gm −1 s −1 Pa −1 . Medina et al [ 60 ] investigated the barrier properties of chitosan-quinoa films containing chitosan-thymol nanoparticles with obtained WVP values of 0.34 ± 0.05 × 10 −8 gm −1 s −1 Pa −1 .…”

Section: Resultsmentioning

confidence: 99%

Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties

et al. 2020

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In the present study, supercritical solvent impregnation (SSI) has been applied to incorporate thymol into bio-composite polymers as a potential active packaging material. Thymol, a natural component with a proven antimicrobial activity, was successfully impregnated into starch-chitosan (SC) and starch-chitosan-zeolite (SCZ) films using supercritical carbon dioxide (scCO2) as a solvent. Experiments were performed at 35 °C, pressures of 15.5 and 30 MPa, and an impregnation time in the range of 4–24 h. The highest impregnation yields of SC films with starch to chitosan mass ratios of 1:1 and 1:2 were 10.80% and 6.48%, respectively. The addition of natural zeolite (15–60%) significantly increased the loading capacity of films enabling thymol incorporation in a quantity of 16.7–27.3%. FTIR and SEM analyses were applied for the characterization of the films. Mechanical properties and water vapor permeability of films before and after the impregnation were tested as well. Thymol release kinetics in deionized water was followed and modeled by the Korsmeyer-Peppas and Weibull model. SCZ films with thymol loading of approximately 24% exhibited strong antibacterial activity against E. coli and methicillin-resistant Staphylococcus (S.) aureus (MRSA).

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Section: Resultsmentioning

confidence: 99%

Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties

et al. 2020

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“…(c) encapsulating the bioactive compounds, keeping them trapped inside a wall material, forming micro or nanoparticles. Then, performing the incorporation by physical and direct mixing of micro or nanoparticles with the biopolymer in the film producing process [30,36,[114][115][116];…”

Section: Methods For Incorporating Bioactive Compoundsmentioning

confidence: 99%

“…The release of thymol from gelatin films was more influenced by the lecithin content used as an emulsifier than by the thymol content. Apparently, the highest level of lecithin (1%) decreased the gelatin network's cohesiveness, which resulted in an increase in the film porosity, favoring the release of thymol [115]. The increase in the concentration of thymol also led to an increase in its diffusion to the film [115].…”

Section: Bioactive Propertiesmentioning

confidence: 99%

“…Different methods have been used for encapsulating bioactive compounds so that they can later be incorporated into a film-forming solution. Thymol nanoemulsions, an antimicrobial essential oil, was produced by mixing gelatin and soy lecithin [115]. The lyophilization method was applied by Rodsamran et al [126] for the microencapsulation of phenolic compounds from fresh rice extract, and from blackberry pulp by Nogueira et al [29].…”

Section: Films With Encapsulated Plant-derived Bioactive Compounds Dementioning

confidence: 99%

“…Once the bioactive compound is encapsulated, it can be incorporated into the film-forming solution directly [30,114,115,127] with later deposition of the resulting solution onto drying plates, or by sprinkling as recently reported by Nogueira et al [29,117,118]. In the second method, the film-forming solution is initially deposited onto support plates and, then, the encapsulated bioactive compound is added by sprinkling through a stainless-steel sieve over the entire surface area of the film-forming solution already arranged on the plates.…”

Section: Films With Encapsulated Plant-derived Bioactive Compounds Dementioning

confidence: 99%

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Methods of Incorporating Plant-Derived Bioactive Compounds into Films Made with Agro-Based Polymers for Application as Food Packaging: A Brief Review

et al. 2020

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Plastic, usually derived from non-renewable sources, is among the most used materials in food packaging. Despite its barrier properties, plastic packaging has a recycling rate below the ideal and its accumulation in the environment leads to environmental issues. One of the solutions approached to minimize this impact is the development of food packaging materials made from polymers from renewable sources that, in addition to being biodegradable, can also be edible. Different biopolymers from agricultural renewable sources such as gelatin, whey protein, starch, chitosan, alginate and pectin, among other, have been analyzed for the development of biodegradable films. Moreover, these films can serve as vehicles for transporting bioactive compounds, extending their applicability as bioactive, edible, compostable and biodegradable films. Biopolymer films incorporated with plant-derived bioactive compounds have become an interesting area of research. The interaction between environment-friendly biopolymers and bioactive compounds improves functionality. In addition to interfering with thermal, mechanical and barrier properties of films, depending on the properties of the bioactive compounds, new characteristics are attributed to films, such as antimicrobial and antioxidant properties, color and innovative flavors. This review compiles information on agro-based biopolymers and plant-derived bioactive compounds used in the production of bioactive films. Particular emphasis has been given to the methods used for incorporating bioactive compounds from plant-derived into films and their influence on the functional properties of biopolymer films. Some limitations to be overcome for future advances are also briefly summarized. This review will benefit future prospects for exploring innovative methods of incorporating plant-derived bioactive compounds into films made from agricultural polymers.

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Liquid Metal Chemical Plating Rheological Modification Method for Magnetic Metal Materials

Luo,

Zhou

2024

Adv Funct Materials

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Liquid metal (LM)‐based magnetic fluids have attracted attention due to their rapid magnetic response, flexibility, and maneuverability. However, the nonwettability at the interface between metal particles and LM due to surface energy mismatch makes it challenging for metal particles to penetrate the LM oxide layer. Here, a strategy for mixing magnetic iron particles into LM through a reactive wetting mechanism is proposed. To address the inherent nonwettability at the interface between Fe particles and LM, FeGa2O4 is synthesized as a shell of Fe particles to enhance compatibility between Fe particles and LM. In particular, the wetting behavior of the FeGa2O4 shell on the interface between Fe@FeGa2O4 and LM is explained and validated based on the contact angle theory and density functional theory. Moreover, the mixture of Fe@FeGa2O4 particles into the LM enhances the rheological properties of the composite, effectively overcomes the inherent limitation of the low mechanical strength of LM, and improves the magnetic, electrical, and thermal properties of LM. Furthermore, studies on the adhesion mechanism of LM composites indicate that Fe@FeGa2O4 particles carrying more oxides into LM are crucial factors for adhesion. Given these notable advantages, LM‐based magnetic composites have shown tremendous potential in flexible electronics, soft robotics, and lightweight LM thermal interface materials.

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Gelatin films incorporated with thymol nanoemulsions: Physical properties and antimicrobial activities

Cited by 130 publications

References 38 publications

Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties

Application of Supercritical Solvent Impregnation for Production of Zeolite Modified Starch-Chitosan Polymers with Antibacterial Properties

Methods of Incorporating Plant-Derived Bioactive Compounds into Films Made with Agro-Based Polymers for Application as Food Packaging: A Brief Review

Liquid Metal Chemical Plating Rheological Modification Method for Magnetic Metal Materials

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