Improving moisture barrier and functional properties of active film from genipin‐crosslinked chitosan/astaxanthin film by heat curing

Inthamat, Patthrare; Lee, Youn Suk; Boonsiriwit, Athip; Siripatrawan, Ubonrat

doi:10.1111/ijfs.15396

Cited by 8 publications

(6 citation statements)

References 20 publications

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“…A similar trend was observed for the CS1.5G-105 film with curing at 105 °C, producing the lowest WVP value of 0.81 ± 0.01×10 -4 g mm/h/mm 2 /Pa compared with that of CS1.5G-25. These results agreed well with those obtained by Inthamat et al (2021b) and Rivero et al (2011) who reported that the molecular alterations in film structure due to curing at high temperatures, probably because the carboxylic acid could react with the amine group to form an amide resulting in water being eliminated (de Castro et al, 2013).…”

Section: Water Vapor Permeability Of Thermal Curing Filmssupporting

confidence: 92%

“…Similarly, these peaks were moved to 1728 cm -1 and 1577 cm -1 for CS1.5G-105. A peak at 1410 cm -1 of CS1.5G-80 and CS1.5G-105 was detected when those films had higher density due to heat curing, probably attributed to the C-C binding between the genipin molecules already linked to the amino groups of the chitosan chain (Inthamat et al, 2021b).…”

Section: Effect Of Thermal Curing On Chitosan and Crosslinked Chitosa...mentioning

confidence: 99%

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Thermal curing to improve properties of genipin-crosslinking chitosan film

2022

ANRES

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Importance of the work: Chitosan film as a natural biodegradable packaging material has limited food applications due to its high moisture permeability and poor mechanical strength. Crosslinking with genipin, a natural crosslinker, and thermal curing were applied to eliminate these drawbacks. Objective: To study the effect of the genipin concentration and thermal curing on the chemical structure and properties of chitosan film. Materials & Methods: Chitosan (CS, 1.5 g) solution were prepared crosslinked with genipin at 0.5%, 1.0% or 1.5 (all weight per weight, w/w of chitosan) % and cured at 25 °C, 80 °C or 105 °C. Film properties were investigated: water vapor permeability (WVP), tensile strength (TS), elongation at break (EAB), Young's modulus (YM), thermal stability, crystallinity and contact angle. Results: Increasing the genipin concentration significantly increased the degree of crosslinking, TS and YM of the films, with the best film obtained at 1.5% w/w genipin (CS1.5G). The CS1.5G film with curing at 105 °C (CS1.5G-105) had the highest (p < 0.05) TS (36.45 MPa), YM (315.99 N/m 2 ) and thermal stability due to a high conjugation of C double bonding between the genipin molecules in the chitosan chains. However, CS1.5G-105 decreased the crystallinity, EAB and WVP, while the contact angle value increased. Main finding: Improving properties, such as the mechanical strength and moisture barrier of the genipin-crosslinked film, could be achieved by thermal curing, thus increasing the potential of the film for use as food packaging in the food industry.

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Section: Water Vapor Permeability Of Thermal Curing Filmssupporting

confidence: 92%

Section: Effect Of Thermal Curing On Chitosan and Crosslinked Chitosa...mentioning

confidence: 99%

Thermal curing to improve properties of genipin-crosslinking chitosan film

2022

ANRES

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“…The polyene chain of AST is capable of a strong antioxidant effect with a unique chemical structure that traps radicals [ 55 ], in which the long-conjugated double-bonded polyene possesses ROS removal capability by regulating the redox balance due to its inherent lipophilic and hydrophilic properties. Moreover, it exhibits higher antioxidant activity than other carotenoids such as β-carotene and lutein because of the presence of two oxygen groups, including hydroxyl (OH) and carbonyl (C = O) in each of the rings [ 56 ]. Consequently, as can be seen from the ABTS and DPPH assay of GO and AST, the synergistic combination of the AST and GO may provide unprecedented scenarios as new antioxidant material to those working in this nanobiotechnology field, thereby these materials can be considered as a strong candidate for an antioxidant platform for the treatment of various oxidative stress-mediated diseases.…”

Section: Discussionmentioning

confidence: 99%

Surface-mediated high antioxidant and anti-inflammatory effects of astaxanthin-loaded ultrathin graphene oxide film that inhibits the overproduction of intracellular reactive oxygen species

2022

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Background Astaxanthin (AST) is known as a powerful antioxidant that affects the removal of active oxygen and inhibits the production of lipid peroxide caused by ultraviolet light. However, it is easily decomposed by heat or light during production and storage because of the unsaturated compound nature with a structural double bond. The activity of AST can be reduced and lose its antioxidant capability. Graphene oxide (GO) is an ultrathin nanomaterial produced by oxidizing layered graphite. The chemical combination of AST with GO can improve the dispersion properties to maintain structural stability and antioxidant activity because of the tightly bonded functionalized GO surface. Methods Layered GO films were used as nanocarriers for the AST molecule, which was produced via flow-enabled self-assembly and subsequent controlled solution deposition of RGD peptide and AST molecules. Synthesis of the GO-AST complex was also carried out for the optimized concentration. The characterization of prepared materials was analyzed through transmission electron microscopy (TEM), scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FT-IR), atomic force microscope (AFM), and Raman spectroscopy. Antioxidant activity was tested by 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 2.2-diphenyl-1-picrylhydrazyl (DPPH) assays. The antibacterial effect and antioxidant effects were monitored for the ultrathin GO/RGD/AST Film. Further, reactive oxygen species (ROS) assay was used to evaluate the anti-inflammatory effects on L-929 fibroblasts. Results Cotreatment of GO-AST solution demonstrated a high antioxidant combined effect with a high ABTS and DPPH radicals scavenging activity. The GO/RGD/AST film was produced by the self-assembly process exhibited excellent antibacterial effects based on physicochemical damage against E. coli and S. aureus. In addition, the GO/RGD/AST film inhibited H2O2-induced intracellular ROS, suppressed the toxicity of lipopolysaccharide (LPS)-induced cells, and restored it, thereby exhibiting strong antioxidant and anti-inflammatory effects. Conclusion As GO nanocarrier-assisted AST exerted promising antioxidant and antibacterial reactions, presented a new concept to expand basic research into the field of tissue engineering.

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“…112 Interestingly, Inthamat et al (2021) improved the moisture barrier of a film based on chitosan and astaxanthin by heat curing. 113 Furthermore, brittleness and rigidity are common issues faced by bioplastics, which may be overcome with mechanical reinforcements. 1 For example, modified silica nanoparticles improved the mechanical and barrier properties of a chitosan film.…”

Section: Packaging Properties For Commercialisationmentioning

confidence: 99%