Antimicrobial packaging efficiency of ZnO-SiO2 nanocomposites infused into PVA/CS film for enhancing the shelf life of food products

Al-Tayyar, Nasser A.; Youssef, Ahmed M.; Al-Hindi, Rashad R.

doi:10.1016/j.fpsl.2020.100523

Cited by 149 publications

(69 citation statements)

References 54 publications

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“…Self-healing efficacies%. The ratio of healed stress or strain at the breaking point to the initial value is known as selfhealing efficacy%, as illustrated in eqn (3). The coating lms were cut into two identical pieces, and the lm was le to heal under ambient temperature for the desired time.…”

Section: Moisture Content%mentioning

confidence: 99%

“…Auto-healing coatings that can repair their damage automatically or by means of external stimuli have received attention recently. [1][2][3][4] Generally, self-healing materials include two main categories: inherent self-healing materials that exhibit dynamic reversibility of covalent and non-covalent bonds, [5][6][7][8] such as Schiff bases, 9 host-guest interaction, 10 Diels-Alder, 11 and hydrogen bonding, 12 and extrinsic self-healing materials that rely on the performance of agents encapsulated into hollow structures, microspheres, and nanospheres. 13,14 Inherent selfhealing materials have aroused more interest than extrinsic ones because the latter frequently necessitate healing agents to repair the damage that occurs.…”

Section: Introductionmentioning

confidence: 99%

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Smart edible coating films based on chitosan and beeswax–pollen grains for the postharvest preservation of Le Conte pear

et al. 2021

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Section: Moisture Content%mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Smart edible coating films based on chitosan and beeswax–pollen grains for the postharvest preservation of Le Conte pear

et al. 2021

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“…The incorporation of nanoparticles in a polymer can not only improve its general physical properties, but it can also add new functionalities—for instance, biocidal characteristics [ 6 , 7 , 8 , 9 ]. These materials constitute an attractive alternative to be used in the medical or food packaging fields.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Antimicrobial Polyethylene Composites with CaO Nanoparticles

et al. 2020

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Low-density polyethylene composites containing different sizes of calcium oxide (CaO) nanoparticles were obtained by melt mixing. The CaO nanoparticles were synthesized by either the sol-gel or sonication methods, obtaining two different sizes: ca. 55 nm and 25 nm. These nanoparticles were used either as-synthesized or were modified organically on the surface with oleic acid (Mod-CaO), at concentrations of 3, 5, and 10 wt% in the polymer. The Mod-CaO nanoparticles of 25 nm can act as nucleating agents, increasing the polymer’s crystallinity. The Young’s Modulus increased with the Mod-CaO nanoparticles, rendering higher reinforcement effects with an increase as high as 36%. The reduction in Escherichia coli bacteria in the nanocomposites increased with the amount of CaO nanoparticles, the size reduction, and the surface modification. The highest antimicrobial behavior was found in the composites with a Mod-CaO of 25 nm, presenting a reduction of 99.99%. This strong antimicrobial effect can be associated with the release of the Ca2+ from the composites, as studied for the composite with 10 wt% nanoparticles. The ion release was dependent on the size of the nanoparticles and their surface modification. These findings show that CaO nanoparticles are an excellent alternative as an antimicrobial filler in polymer nanocomposites to be applied for food packaging or medical devices.

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“…The combined use of binary antimicrobial agents could reduce the cytotoxicity but not the antimicrobial effect 10 , 25 . Furthermore, several studies have shown that the incorporation of antimicrobial agents such as CuO 40 , CuSO 4 41 , ZnO 42 , ZnO-SiO 2 43 , and Re-ZnO 44 into biopolymers can effectively combat Gram-positive and Gram-negative bacteria in a concentration-dependent manner. However, binary ZnO/CuO nanocomposites prepared from Calotropis gigantea ( C .…”

Section: Introductionmentioning

confidence: 99%

Compositions and antimicrobial properties of binary ZnO–CuO nanocomposites encapsulated calcium and carbon from Calotropis gigantea targeted for skin pathogens

Govindasamy

Mydin

Sreekantan

et al. 2021

Sci Rep

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Calotropis gigantea (C. gigantea) extract with an ecofriendly nanotechnology approach could provide promising antimicrobial activity against skin pathogens. This study investigates the antimicrobial capability of green synthesized binary ZnO–CuO nanocomposites from C. gigantea against non-MDR (Staphylococcus aureus and Escherichia coli) and MDR (Klebsiella pneumoniae, Pseudomonas aeruginosa and methicillin-resistant S. aureus) skin pathogens. Scanning electron microscopy and transmission electron microscopy revealed the size and shape of B3Z1C sample. Results of X-ray powder diffraction, energy-dispersive spectroscopy, FTIR and UV–Vis spectroscopy analyses confirmed the presence of mixed nanoparticles (i.e., zinc oxide, copper oxide, carbon and calcium) and the stabilising phytochemical agents of plant (i.e., phenol and carbonyl). Antimicrobial results showed that carbon and calcium decorated binary ZnO–CuO nanocomposites with compositions of 75 wt% of ZnO and 25 wt% CuO (B3Z1C) was a strong bactericidal agent with the MBC/MIC ratio of ≤ 4 and ≤ 2 for non-MDR and MDR pathogens, respectively. A significant non-MDR zone of inhibitions were observed for BZC by Kirby–Bauer disc-diffusion test. Further time-kill observation revealed significant fourfold reduction in non-MDR pathogen viable count after 12 h study period. Further molecular studies are needed to explain the biocidal mechanism underlying B3Z1C potential.

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Antimicrobial packaging efficiency of ZnO-SiO2 nanocomposites infused into PVA/CS film for enhancing the shelf life of food products

Cited by 149 publications

References 54 publications

Smart edible coating films based on chitosan and beeswax–pollen grains for the postharvest preservation of Le Conte pear

Smart edible coating films based on chitosan and beeswax–pollen grains for the postharvest preservation of Le Conte pear

Mechanical and Antimicrobial Polyethylene Composites with CaO Nanoparticles

Compositions and antimicrobial properties of binary ZnO–CuO nanocomposites encapsulated calcium and carbon from Calotropis gigantea targeted for skin pathogens

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