Novel composite films based on sodium alginate and gallnut extract with enhanced antioxidant, antimicrobial, barrier and mechanical properties

Aloui, Hajer; Deshmukh, Aarti R.; Khomlaem, Chanin; Kim, Beom Soo

doi:10.1016/j.foodhyd.2020.106508

Cited by 100 publications

(58 citation statements)

References 41 publications

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“…Another very important aspect to be analyzed is the morphological aspects used to assess the structure of films, such as homogeneity and the presence of pores, cracks, voids, and imperfections [ 36 ], which directly impact the potential for food conservation. The films based on sodium alginate were in perfect condition, as in the study by Galus and Lenart [ 37 ] and Aloui et al [ 38 ], showing that this property is characteristic of films of this polymeric matrix.…”

Section: Discussionmentioning

confidence: 52%

“…This characteristic is very important because by acting as a free radical eliminator and hydrogen donor, as is the case with most of the active compounds of natural antioxidants, there is an inhibition of the generation and propagation of reactive species and free radicals [ 52 ]. Corroborating these results, several studies indicate that the inclusion of additives endowed with phenolic compounds, such as functional and/or essential oils, promotes a significant improvement in the antioxidant activity of biopolymeric films [ 38 , 53 , 54 ].…”

Section: Discussionmentioning

confidence: 98%

“…The greater efficiency of the application of antioxidant packaging concerns foods with high fat content [ 38 ], as it delays lipid oxidation, which is the main cause of food deterioration, especially of the most perishable foods, and may directly affect their organoleptic qualities, such as color, flavor, and odor [ 39 ]. Oxidative reactions are responsible for reducing the nutritional value of foods through the degradation of essential fatty acids, proteins, and liposoluble vitamins, producing strange flavors and odors and promoting changes in food color due to pigment degradation [ 55 ].…”

Section: Discussionmentioning

confidence: 99%

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Elaboration and Characterization of Bioactive Films Obtained from the Incorporation of Cashew Nut Shell Liquid into a Matrix of Sodium Alginate

et al. 2021

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The objective of this work was to obtain and characterize sodium alginate-based biopolymer films with the addition of cashew nut shell liquid (CNSL). The study employed a completely randomized design, including 0%, 0.5%, 1%, and 1.5% inclusion of CNSL. Uniform formation of the films was observed, and the addition of CNSL provided better thermal resistance than did the treatment without inclusion, while the addition of CNSL reduced the homogeneity of the microstructure, especially for the 1.5% inclusion level. The permeability of the film increased as the level of CNSL increased, especially in response to the concentrations of 1% and 1.5%, and no significant difference in permeability was observed between these treatments. The tensile strength decreased proportionally as a function of the addition of CNSL, as its inclusion increased the elasticity and elongation of the films. In addition, the films with CNSL demonstrated strong antioxidant activity and discrete antimicrobial activity, and ecotoxicity analysis showed that the levels of CNSL tested and the films produced were nontoxic. Thus, these films are promising and self-sustainable alternatives for the agrifood industry.

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Section: Discussionmentioning

confidence: 52%

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

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Elaboration and Characterization of Bioactive Films Obtained from the Incorporation of Cashew Nut Shell Liquid into a Matrix of Sodium Alginate

et al. 2021

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“…Note that the degradation behavior of all composite films occurred in two main distinct thermal events, which is typical for sodium alginate-based films ( Fig. 2 (c)) ( Aloui et al, 2021 ; Ho et al, 2020 ; Liu et al, 2017 ). Table 2 shows the initial degradation (T onset ) and maximum decomposition (T max ) temperatures for the mentioned thermal events.…”

Section: Resultsmentioning

confidence: 79%

Improving the mechanical properties and thermal stability of sodium alginate/hydrolyzed collagen films through the incorporation of SiO2

Júnior

Rodrigues

Silva

et al. 2022

Current Research in Food Science

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Biopolymer-based films have become leading alternatives to traditional fossil-based packaging plastics. Among the countless types of biopolymers with potential for such applications, films containing hydrolyzed collagen in their composition were scarcely explored. This study determined the effect of different loads of nano-SiO 2 (0, 2, 6, 8 and 10% w/w of sodium alginate) in the sodium alginate (SA) and hydrolyzed collagen (HC) blend films in terms of structure, thickness, mechanical properties, and thermal stability. The results indicated an improvement in the general mechanical and thermal behavior. Tensile strength increased from 18.2 MPa (control sample) to 25.4 MPa for the SA/HC film incorporated with 10% nano-SiO 2 . In the same condition, the film's elongation at break improved impressively (from 19.5 to 35.8%). Thermal stability improved slightly for all proportions of nano-SiO 2 . Therefore, the addition of nano-SiO 2 can be an easy and simple strategy to improve crucial properties of SA/HC blend films, increasing its performance for future application as sustainable packaging.

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“…SA is non-toxic, renewable, and biodegradable and can be used in the production of active coating as a polymer matrix for the substance to be released [ 15 ]. The coatings obtained from SA are uniform and transparent, however, SA-based coatings exhibit poor moisture barrier properties due to the high hydrophilicity [ 16 ]. LBG is non-ionic and its aqueous solubility is not affected by pH or ionic strength of the liquid medium [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Active Coatings Containing Lippa citriodora Kunth. Essential Oil on Bacterial Diversity and Myofibrillar Proteins Degradation in Refrigerated Large Yellow Croaker

Wang

Gao

et al. 2021

Polymers

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The research evaluated the effects of locust bean gum (LBG) and sodium alginate (SA) active coatings containing 0.15, 0.30 or 0.60% lemon verbena (Lippa citriodora Kunth.) essential oil (LVEO) on the bacterial diversity and myofibrillar proteins (MPs) of large yellow croaker during refrigerated storage at 4 °C for 18 days. Variability in the dominant bacterial community in different samples on the 0, 9th and 18th day was observed. Pseudomonas and Shewanella were the two major genera identified during refrigerated storage. At the beginning, the richness of Pseudomonas was about 37.31% and increased for control (CK) samples during refrigerated storage, however, the LVEO-treated samples increased sharply from day 0 to the 9th day and then decreased. LBG-SA coatings containing LVEO treatments significantly delayed MPs oxidation by retarding the formation of free carbonyl compounds and maintaining higher sulfhydryl content, higher Ca2+-ATPase activity, better organized secondary (higher contents of α-helix and β-sheet) and tertiary structures during refrigerated storage. The transmission electron microscope (TEM) images showed that the integrity of the sarcomere was damaged; the boundaries of the H-, A-, and I-bands, Z-disk, and M-line were fuzzy in the CK samples at the end of storage. However, the LVEO-treated samples were still regular in appearance with distinct dark A-bands, light I-bands, and Z-disk. In brief, LBG-SA active coatings containing LVEO treatments suggested a feasible method for protecting the MPs of large yellow croaker during refrigerated storage.

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Novel composite films based on sodium alginate and gallnut extract with enhanced antioxidant, antimicrobial, barrier and mechanical properties

Cited by 100 publications

References 41 publications

Elaboration and Characterization of Bioactive Films Obtained from the Incorporation of Cashew Nut Shell Liquid into a Matrix of Sodium Alginate

Elaboration and Characterization of Bioactive Films Obtained from the Incorporation of Cashew Nut Shell Liquid into a Matrix of Sodium Alginate

Improving the mechanical properties and thermal stability of sodium alginate/hydrolyzed collagen films through the incorporation of SiO2

Effect of Active Coatings Containing Lippa citriodora Kunth. Essential Oil on Bacterial Diversity and Myofibrillar Proteins Degradation in Refrigerated Large Yellow Croaker

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