Antimicrobial and antioxidant AIE chitosan-based films incorporating a Pickering emulsion of lemon myrtle (Backhousia citriodora) essential oil

Liu, Lingdai; Swift, Simon; Tollemache, Cherie; Perera, Janesha; Kilmartin, Paul A.

doi:10.1016/j.foodhyd.2022.107971

Cited by 18 publications

(9 citation statements)

References 44 publications

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“…After ultrasound treatment, the resultant Cs/OCNF@ d -Limonene Pickering emulsions containing different d -Limonene to OCNF volume ratios of 1:8 (CFL1), 2:8 (CFL2), 3:8 (CFL3), and 4:8 (CFL4) exhibited remarkable stability for up to 30 days without phase separation or droplet coalescence even under inversion (Figure b). This observation validates that the addition of Cs into the Pickering emulsion does not compromise its initial integrity, on the contrary, enhance the stability of Pickering emulsions significantly, which is consistent with the previous reports . The OCNF as solid particles was irreversibly adsorbed at the liquid–liquid interface due to their high adsorption energy .…”

Section: Resultssupporting

confidence: 92%

“…This observation validates that the addition of Cs into the Pickering emulsion does not compromise its initial integrity, on the contrary, enhance the stability of Pickering emulsions significantly, which is consistent with the previous reports. 24 The OCNF as solid particles was irreversibly adsorbed at the liquid−liquid interface due to their high adsorption energy. 25 The shear viscosities of OCNF@D-Limonene and Cs/ OCNF@D-Limonene Pickering emulsions as a function of the shear rate at room temperature were measured to study the workability as a conformal coating (Figure 1c).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Incorporating of Oxidized Cellulose Nanofibers@d-Limonene Pickering Emulsion into Chitosan for Fully Biobased Coatings toward Fruits Protection

Yue,

Miao,

Feng

2023

ACS Sustainable Chem. Eng.

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Due to the perishable nature and limited shelf life, it is crucial to develop highly efficient techniques for fruit preservation while avoiding the use of environmentally hazardous materials. Herein, the ecofriendly oxidized cellulose nanofibers (OCNF) with an optimized solid content (1.0 wt %) was utilized to stabilize d-Limonene to form an oil-in-water Pickering emulsion. By incorporating the Pickering emulsion into chitosan (Cs) solution, fully biobased Cs/OCNF@d-Limonene coatings were successfully obtained via a simple solvent casting method. Thanks to the physical cross-linking and hydrogen bond reaction between OCNF and Cs matrix, the films exhibited high transmittance, high haze, exceptional mechanical properties, and the ability to effectively shield 96.5% UVB and 69.3% UVA radiation. Most importantly, the inclusion of d-Limonene exhibited a remarkable enhancement in the inhibition zones against E. coli and S. aureus, and an outstanding 72.5% improvement in antioxidation properties. These outstanding film properties make the Cs/OCNF@d-Limonene coatings ideal as conformal films for fruit protection, which can effectively reduce the fruit water loss rate, delay ripening, prevent oxidation and microbial invasion, and significantly extend the shelf life of fruits. The well-designed coatings present a promising, cost-effective, and sustainable alternative to conventional plastic packaging materials for fruit protection.

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Section: Resultssupporting

confidence: 92%

Section: ■ Results and Discussionmentioning

confidence: 99%

Incorporating of Oxidized Cellulose Nanofibers@d-Limonene Pickering Emulsion into Chitosan for Fully Biobased Coatings toward Fruits Protection

Yue,

Miao,

Feng

2023

ACS Sustainable Chem. Eng.

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“…So, functional substances, such as tea polyphenols, protocatechuic acid and essential oils, have been incorporated into chitosan to enhance its antibacterial and antioxidant activity. [12][13][14] Sanguisorba officinalis L. is a perennial herb and is one among several species belonging to Sanguisorba genus. 15 S. officinalis L. contains polyphenols, triterpenes and flavonoids, as well as other active components.…”

Section: Introductionmentioning

confidence: 99%

“…Chitosan, a N -deacetylated derivative of chitin, is a linear polysaccharide composed of randomly linked β-(1–4)-2-acetamido- d glucose and β-(1–4)-2-amino- d -glucose units. 12 Owing to its low toxicity, biodegradability, good film-forming capability, chitosan has been widely used to fabricate coatings or films for food preservation. Improvement in the activity of chitosan could expand its applications in active food packaging.…”

Section: Introductionmentioning

confidence: 99%