Antibacterial and Freshness-Preserving Mechanisms of Chitosan-Nano-TiO2-Nano-Ag Composite Materials

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...

Full description

Bibliographic Details
Main Authors:	Zihao Dong, Ran Li, Yan Gong
Format:	Article
Language:	English
Published:	MDPI AG 2021-07-01
Series:	Coatings
Subjects:	nano-TiO<sub>2</sub> nano-TiO<sub>2</sub>-Ag CTS-TiO<sub>2</sub>-Ag antibacterial performance freshness preservation
Online Access:	https://www.mdpi.com/2079-6412/11/8/914

id	doaj-2db2408b6a224fc99348d7e0480243bb
record_format	Article
spelling	doaj-2db2408b6a224fc99348d7e0480243bb2021-08-26T13:38:39ZengMDPI AGCoatings2079-64122021-07-011191491410.3390/coatings11080914Antibacterial and Freshness-Preserving Mechanisms of Chitosan-Nano-TiO<sub>2</sub>-Nano-Ag Composite MaterialsZihao Dong0Ran Li1Yan Gong2School of Life Sciences, Shanxi Normal University, Linfen 041004, ChinaSchool of Life Sciences, Shanxi Normal University, Linfen 041004, ChinaSchool of Life Sciences, Shanxi Normal University, Linfen 041004, ChinaWith chitosan, nano-TiO<sub>2</sub> and nano-Ag as raw materials, nano-TiO<sub>2</sub> and nano-TiO<sub>2</sub>-Ag were modified by a surface modifier-sodium laurate. Chitosan (CTS), chitosan-nano-TiO<sub>2</sub> (CTS-TiO<sub>2</sub>), and chitosan-nano-TiO<sub>2</sub>-nano-Ag (CTS-TiO<sub>2</sub>-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 <i>Escherichia coli</i>, <i>Staphylococcus aureus</i>, and <i>Bacillus subtilis</i> 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-TiO<sub>2</sub>-Ag and CTS-TiO<sub>2</sub> composite films both showed better physical properties, and both demonstrated higher antibacterial effects, especially for <i>E</i>. <i>coli</i>. Measurement of physiological indices in fruits and vegetables showed that the freshness-preserving effect of CTS-TiO<sub>2</sub>-Ag coating films was the most significant. In all, the CTS-TiO<sub>2</sub>-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.https://www.mdpi.com/2079-6412/11/8/914nano-TiO<sub>2</sub>nano-TiO<sub>2</sub>-AgCTS-TiO<sub>2</sub>-Agantibacterial performancefreshness preservation
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Zihao Dong Ran Li Yan Gong
spellingShingle	Zihao Dong Ran Li Yan Gong Antibacterial and Freshness-Preserving Mechanisms of Chitosan-Nano-TiO<sub>2</sub>-Nano-Ag Composite Materials Coatings nano-TiO<sub>2</sub> nano-TiO<sub>2</sub>-Ag CTS-TiO<sub>2</sub>-Ag antibacterial performance freshness preservation
author_facet	Zihao Dong Ran Li Yan Gong
author_sort	Zihao Dong
title	Antibacterial and Freshness-Preserving Mechanisms of Chitosan-Nano-TiO<sub>2</sub>-Nano-Ag Composite Materials
title_short	Antibacterial and Freshness-Preserving Mechanisms of Chitosan-Nano-TiO<sub>2</sub>-Nano-Ag Composite Materials
title_full	Antibacterial and Freshness-Preserving Mechanisms of Chitosan-Nano-TiO<sub>2</sub>-Nano-Ag Composite Materials
title_fullStr	Antibacterial and Freshness-Preserving Mechanisms of Chitosan-Nano-TiO<sub>2</sub>-Nano-Ag Composite Materials
title_full_unstemmed	Antibacterial and Freshness-Preserving Mechanisms of Chitosan-Nano-TiO<sub>2</sub>-Nano-Ag Composite Materials
title_sort	antibacterial and freshness-preserving mechanisms of chitosan-nano-tio<sub>2</sub>-nano-ag composite materials
publisher	MDPI AG
series	Coatings
issn	2079-6412
publishDate	2021-07-01
description	With chitosan, nano-TiO<sub>2</sub> and nano-Ag as raw materials, nano-TiO<sub>2</sub> and nano-TiO<sub>2</sub>-Ag were modified by a surface modifier-sodium laurate. Chitosan (CTS), chitosan-nano-TiO<sub>2</sub> (CTS-TiO<sub>2</sub>), and chitosan-nano-TiO<sub>2</sub>-nano-Ag (CTS-TiO<sub>2</sub>-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 <i>Escherichia coli</i>, <i>Staphylococcus aureus</i>, and <i>Bacillus subtilis</i> 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-TiO<sub>2</sub>-Ag and CTS-TiO<sub>2</sub> composite films both showed better physical properties, and both demonstrated higher antibacterial effects, especially for <i>E</i>. <i>coli</i>. Measurement of physiological indices in fruits and vegetables showed that the freshness-preserving effect of CTS-TiO<sub>2</sub>-Ag coating films was the most significant. In all, the CTS-TiO<sub>2</sub>-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.
topic	nano-TiO<sub>2</sub> nano-TiO<sub>2</sub>-Ag CTS-TiO<sub>2</sub>-Ag antibacterial performance freshness preservation
url	https://www.mdpi.com/2079-6412/11/8/914
work_keys_str_mv	AT zihaodong antibacterialandfreshnesspreservingmechanismsofchitosannanotiosub2subnanoagcompositematerials AT ranli antibacterialandfreshnesspreservingmechanismsofchitosannanotiosub2subnanoagcompositematerials AT yangong antibacterialandfreshnesspreservingmechanismsofchitosannanotiosub2subnanoagcompositematerials
_version_	1721194121255714816

Antibacterial and Freshness-Preserving Mechanisms of Chitosan-Nano-TiO<sub>2</sub>-Nano-Ag Composite Materials

Similar Items