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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MDPI AG
2020-07-01
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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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