AI Article Synopsis
- - The study addresses the toxicity issues of silver nanoparticles (AgNPs) in food packaging and explores methods to control their release to minimize this toxicity.
- - Researchers created two types of carbon spheres embedded with AgNPs using green hydrothermal methods, which showed high stability and only released small amounts of silver over 14 days (5.63% and 3.59%).
- - Incorporating these carbon spheres into chitosan films improved the films' microstructure and maintained good antibacterial properties while ensuring safety, contributing to safer designs for AgNPs as antibacterial agents.
Article Abstract
The cumulative toxicity of AgNPs has limited their application in food packaging. As such, the quest for AgNPs should focus on controlling their release to reduce the cumulative toxicity. Here, two kinds of green hydrothermal carbonized methods were used to treat sulfhydryl-modified chitosan to obtain two kinds of carbon spheres/AgNPs (Glutinous rice sesameballs-like AgNPs-SMCS and dragon fruit-like SMCS-Ag), which exhibited good stability and high immobilization efficiency for AgNPs, and the release of total Ag from AgNPs-SMCS and SMCS-Ag were only about 5.63% and 3.59% after 14 days, respectively. Subsequently, they were added into chitosan separately to prepare chitosan-based films. Two carbon spheres/AgNPs regulated the microstructure of chitosan-based films because of the electrostatic interaction and the micro-nanometer filling behavior, thus further immobilized the AgNPs. Importantly, the films presented good antibacterial activity and excellent safety. These results will provide a theoretical basis for the green and safe design of AgNPs antibacterial agent.
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| http://dx.doi.org/10.1016/j.foodchem.2021.130342 | DOI Listing |
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