4.7 Article

Multifunctional antibacterial films with silver nanoparticles reduced in situ by lemon juice

期刊

FOOD CHEMISTRY
卷 365, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2021.130517

关键词

Silver nanoparticles; In situ reduction; Lemon juice; Antibacterial films; Fresh-keeping

资金

  1. Foundation for Middle-Young Age Teachers in Fujian Provincial Edu-cation Office [JAT190354]
  2. Innovation and Entrepreneurship Training Program for College Students in 2020 of Fujian Province of China [202010402089, 202010402088]
  3. Natural Science FoundationYouth Innovation Project of Fujian Province of China [2018 J05060]
  4. Project of Outstanding Young Scientific Talents in Colleges and Universities of Fujian Province of China

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A antibacterial film consisting of PVA, SS, and AgNPs was developed to combat microbial corruption, showing better tensile strength and resistance to water vapor permeability, moisture absorption, and transmittance. The film had good bacteriostatic effects on various bacteria and potential wide applications.
Microorganisms contribute to deterioration of garden stuff after picking. Antibacterial films consisting of polyvinyl alcohol (PVA), soluble starch (SS), and silver nanoparticles (AgNPs) with AgNPs in situ reduced from AgNO3 by lemon juice (LJ) were developed to combat microbial corruption. PVA/SS/LJ/AgNPs films have better tensile strength and elongation at break, but lower water vapor permeability, moisture absorption, and transmittance compared to PVA/SS and PVA/SS/LJ films. Silver released from PVA/SS/LJ/AgNPs films were 13.55, 18.97, 19.55, 20.19, 20.47, and 20.82 mg/g after submerging samples in water for three seconds and soaking for 1, 2, 3, 4, and 5 days, respectively. PVA/SS/LJ/AgNPs films had good bacteriostatic effects on Escherichia coli, Staphylococcus aureus, Bacillus subtilis, Pseudomonas aeruginosa, and Salmonella, as the average diameter of the inhibition circle was 12.12 +/- 0.01, 13.04 +/- 0.02, 14.79 +/- 0.01, 14.20 +/- 0.01, and 12.68 +/- 0.01 mm, respectively. Therefore, PVA/SS/LJ/AgNPs film has a wide application prospect.

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