Silver nanoparticles(AgNPs)were manufactured using the green method mediated by enoki mushroom water extract,and starch/agar functional films were fabricated.The developed AgNPs were small(~10 nm)and spherical and sho...Silver nanoparticles(AgNPs)were manufactured using the green method mediated by enoki mushroom water extract,and starch/agar functional films were fabricated.The developed AgNPs were small(~10 nm)and spherical and showed strong antibacterial activity towards foodborne pathogenic bacteria,L.monocytogenes,and E.coli.AgNPs were unvaryingly dispersed in the starch/agar matrix,and the inclusion of AgNPs pointedly enhanced the water vapor barrier and hydrophobicity of the starch/agar-based films.However,adding AgNPs did not affect the films’mechanical strength and thermal stability.Also,the AgNPs-added starch/agar film displayed potent antibacterial activity towards E.coli and L.monocytogenes.Starch/agar films with better physical(mechanical strength,water vapor barrier)and functional properties(antibacterial activity)are expected to be applied in active food packaging.展开更多
Modified carbon dots with resazurin(R-CD)were prepared using a hydrothermal method to fabricate a CNF-based pH-responsive indicator for real-time food freshness monitoring.FE-SEM and FTIR results confirmed that the R-...Modified carbon dots with resazurin(R-CD)were prepared using a hydrothermal method to fabricate a CNF-based pH-responsive indicator for real-time food freshness monitoring.FE-SEM and FTIR results confirmed that the R-CD was uniformly distributed in the CNF matrix.The thermal stability of the CNF/R-CD indicator film was increased,and the water contact angle of the film was slightly lower than that of the neat CNF film.The CNF/R-CD film showed excellent UV-barrier properties,with~98.3%and 87.7%blocking the UV-B and UV-A light.The indicator film showed excellent color stability even after 2 months of storage at 25℃ and responded rapidly to alkaline pH and NH3 through a color change from yellow to brownish-red.The CNF/R-CD indicator films exhibited distinct color changes during shrimp packaging depending on pH and TVB-N concentration.Therefore,the CNF/R-CD indicator can be used as a promising pH-sensitive color-changing intelligent packaging application for freshness monitoring.展开更多
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIT)(No.2022R1A2B02001422).
文摘Silver nanoparticles(AgNPs)were manufactured using the green method mediated by enoki mushroom water extract,and starch/agar functional films were fabricated.The developed AgNPs were small(~10 nm)and spherical and showed strong antibacterial activity towards foodborne pathogenic bacteria,L.monocytogenes,and E.coli.AgNPs were unvaryingly dispersed in the starch/agar matrix,and the inclusion of AgNPs pointedly enhanced the water vapor barrier and hydrophobicity of the starch/agar-based films.However,adding AgNPs did not affect the films’mechanical strength and thermal stability.Also,the AgNPs-added starch/agar film displayed potent antibacterial activity towards E.coli and L.monocytogenes.Starch/agar films with better physical(mechanical strength,water vapor barrier)and functional properties(antibacterial activity)are expected to be applied in active food packaging.
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIT)(2022R1A2B5B02001422).
文摘Modified carbon dots with resazurin(R-CD)were prepared using a hydrothermal method to fabricate a CNF-based pH-responsive indicator for real-time food freshness monitoring.FE-SEM and FTIR results confirmed that the R-CD was uniformly distributed in the CNF matrix.The thermal stability of the CNF/R-CD indicator film was increased,and the water contact angle of the film was slightly lower than that of the neat CNF film.The CNF/R-CD film showed excellent UV-barrier properties,with~98.3%and 87.7%blocking the UV-B and UV-A light.The indicator film showed excellent color stability even after 2 months of storage at 25℃ and responded rapidly to alkaline pH and NH3 through a color change from yellow to brownish-red.The CNF/R-CD indicator films exhibited distinct color changes during shrimp packaging depending on pH and TVB-N concentration.Therefore,the CNF/R-CD indicator can be used as a promising pH-sensitive color-changing intelligent packaging application for freshness monitoring.
