Antibacterial and Freshness-Preserving Mechanisms of Chitosan-Nano-TiO2-Nano-Ag Composite Materials
Source abstract
Abstract
With chitosan, nano-TiO2 and nano-Ag as raw materials, nano-TiO2 and nano-TiO2-Ag were modified by a surface modifier-sodium laurate. Chitosan (CTS), chitosan-nano-TiO2 (CTS-TiO2), and chitosan-nano-TiO2-nano-Ag (CTS-TiO2-Ag) composite materials and corresponding films were prepared by a solution co-blending method. Then, the antibacterial performances of the above three types of materials against Escherichia coli, Staphylococcus aureus, and Bacillus subtilis were compared. Moreover, potato and strawberry weight loss rates, peroxidase activity, and vitamin C contents after different film coating treatments were measured. Compared with CTS films, the CTS-TiO2-Ag and CTS-TiO2 composite films both showed better physical properties, and both demonstrated higher antibacterial effects, especially for E. coli. Measurement of physiological indices in fruits and vegetables showed that the freshness-preserving effect of CTS-TiO2-Ag coating films was the most significant. In all, the CTS-TiO2-Ag coating films can actively contribute to the storage of fruits and vegetables at room temperature, and better ensure product quality. Thus, such films are meaningful for research and development of new fruit freshness-keeping techniques and materials.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Nanocomposite Films for Food Packaging · Nanoparticles: synthesis and applications · Advanced Nanomaterials in Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Life Sciences, Shanxi Normal University, Linfen 041004, China
Modern College of Arts and Sciences, Shanxi Normal University, Linfen 041004, China
Funding
College Students' Innovative Entrepreneurial Training Plan Program of China · Fundamental Research Funds Project of Modern College of Arts and Sciences, Shanxi Normal University
References (47)
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