Effects of Different TiO<sub>2</sub> Nanoparticles Concentrations on the Physical and Antibacterial Activities of Chitosan-Based Coating Film

In this investigation, the effect of different concentrations of titanium dioxide (TiO<sub>2</sub>) nanoparticles (NPs) on the structure and antimicrobial activity of chitosan-based coating films was examined. Analysis using scanning electron microscopy (SEM) and atomic force microscopy...

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Main Authors: Yage Xing, Xuanlin Li, Xunlian Guo, Wenxiu Li, Jianwen Chen, Qian Liu, Qinglian Xu, Qin Wang, Hua Yang, Yuru Shui, Xiufang Bi
Format: Article
Language:English
Published: MDPI AG 2020-07-01
Series:Nanomaterials
Subjects:
Online Access:https://www.mdpi.com/2079-4991/10/7/1365
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author Yage Xing
Xuanlin Li
Xunlian Guo
Wenxiu Li
Jianwen Chen
Qian Liu
Qinglian Xu
Qin Wang
Hua Yang
Yuru Shui
Xiufang Bi
author_facet Yage Xing
Xuanlin Li
Xunlian Guo
Wenxiu Li
Jianwen Chen
Qian Liu
Qinglian Xu
Qin Wang
Hua Yang
Yuru Shui
Xiufang Bi
author_sort Yage Xing
collection DOAJ
description In this investigation, the effect of different concentrations of titanium dioxide (TiO<sub>2</sub>) nanoparticles (NPs) on the structure and antimicrobial activity of chitosan-based coating films was examined. Analysis using scanning electron microscopy (SEM) and atomic force microscopy (AFM) revealed that the modified TiO<sub>2</sub> NPs were successfully dispersed into the chitosan matrix, and that the roughness of the chitosan-TiO<sub>2</sub> nanocomposites were significantly reduced. Moreover, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses indicated that the chitosan interacted with TiO<sub>2</sub> NPs and possessed good compatibility, while a thermogravimetric analysis (TGA) of the thermal properties showed that the chitosan-TiO<sub>2</sub> nanocomposites with 0.05% TiO<sub>2</sub> NPs concentration had the best thermal stability. The chitosan-TiO<sub>2</sub> nanocomposite exhibited an inhibitory effect on the growth of <i>Escherichia coli</i> and <i>Staphylococcus aureus</i>. This antimicrobial activity of the chitosan-TiO<sub>2</sub> nanocomposites had an inhibition zone ranging from 9.86 ± 0.90 to 13.55 ± 0.35 (mm). These results, therefore, indicate that chitosan-based coating films incorporated with TiO<sub>2</sub> NPs might become a potential packaging system for prolonging the shelf-life of fruits and vegetables.
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spelling doaj.art-5ce9df00bd7a424a9e9851714fd4554c2023-11-20T06:38:06ZengMDPI AGNanomaterials2079-49912020-07-01107136510.3390/nano10071365Effects of Different TiO<sub>2</sub> Nanoparticles Concentrations on the Physical and Antibacterial Activities of Chitosan-Based Coating FilmYage Xing0Xuanlin Li1Xunlian Guo2Wenxiu Li3Jianwen Chen4Qian Liu5Qinglian Xu6Qin Wang7Hua Yang8Yuru Shui9Xiufang Bi10Key Laboratory of Grain and Oil Engineering and Food Safety of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, ChinaKey Laboratory of Grain and Oil Engineering and Food Safety of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, ChinaKey Laboratory of Grain and Oil Engineering and Food Safety of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, ChinaKey Laboratory of Grain and Oil Engineering and Food Safety of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, ChinaKey Laboratory of Grain and Oil Engineering and Food Safety of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, ChinaKey Laboratory of Grain and Oil Engineering and Food Safety of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, ChinaKey Laboratory of Grain and Oil Engineering and Food Safety of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, ChinaDepartment of Nutrition and Food Science, Maryland University, College Park, MD 20742, USAKey Laboratory of Grain and Oil Engineering and Food Safety of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, ChinaKey Laboratory of Grain and Oil Engineering and Food Safety of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, ChinaKey Laboratory of Grain and Oil Engineering and Food Safety of Sichuan Province, College of Food and Bioengineering, Xihua University, Chengdu 610039, ChinaIn this investigation, the effect of different concentrations of titanium dioxide (TiO<sub>2</sub>) nanoparticles (NPs) on the structure and antimicrobial activity of chitosan-based coating films was examined. Analysis using scanning electron microscopy (SEM) and atomic force microscopy (AFM) revealed that the modified TiO<sub>2</sub> NPs were successfully dispersed into the chitosan matrix, and that the roughness of the chitosan-TiO<sub>2</sub> nanocomposites were significantly reduced. Moreover, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analyses indicated that the chitosan interacted with TiO<sub>2</sub> NPs and possessed good compatibility, while a thermogravimetric analysis (TGA) of the thermal properties showed that the chitosan-TiO<sub>2</sub> nanocomposites with 0.05% TiO<sub>2</sub> NPs concentration had the best thermal stability. The chitosan-TiO<sub>2</sub> nanocomposite exhibited an inhibitory effect on the growth of <i>Escherichia coli</i> and <i>Staphylococcus aureus</i>. This antimicrobial activity of the chitosan-TiO<sub>2</sub> nanocomposites had an inhibition zone ranging from 9.86 ± 0.90 to 13.55 ± 0.35 (mm). These results, therefore, indicate that chitosan-based coating films incorporated with TiO<sub>2</sub> NPs might become a potential packaging system for prolonging the shelf-life of fruits and vegetables.https://www.mdpi.com/2079-4991/10/7/1365TiO<sub>2</sub>antimicrobial activityphysicochemical characterizationchitosan-based coating/film
spellingShingle Yage Xing
Xuanlin Li
Xunlian Guo
Wenxiu Li
Jianwen Chen
Qian Liu
Qinglian Xu
Qin Wang
Hua Yang
Yuru Shui
Xiufang Bi
Effects of Different TiO<sub>2</sub> Nanoparticles Concentrations on the Physical and Antibacterial Activities of Chitosan-Based Coating Film
Nanomaterials
TiO<sub>2</sub>
antimicrobial activity
physicochemical characterization
chitosan-based coating/film
title Effects of Different TiO<sub>2</sub> Nanoparticles Concentrations on the Physical and Antibacterial Activities of Chitosan-Based Coating Film
title_full Effects of Different TiO<sub>2</sub> Nanoparticles Concentrations on the Physical and Antibacterial Activities of Chitosan-Based Coating Film
title_fullStr Effects of Different TiO<sub>2</sub> Nanoparticles Concentrations on the Physical and Antibacterial Activities of Chitosan-Based Coating Film
title_full_unstemmed Effects of Different TiO<sub>2</sub> Nanoparticles Concentrations on the Physical and Antibacterial Activities of Chitosan-Based Coating Film
title_short Effects of Different TiO<sub>2</sub> Nanoparticles Concentrations on the Physical and Antibacterial Activities of Chitosan-Based Coating Film
title_sort effects of different tio sub 2 sub nanoparticles concentrations on the physical and antibacterial activities of chitosan based coating film
topic TiO<sub>2</sub>
antimicrobial activity
physicochemical characterization
chitosan-based coating/film
url https://www.mdpi.com/2079-4991/10/7/1365
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