Chitosan-ZnO Nanocomposites Assessed by Dielectric, Mechanical, and Piezoelectric Properties
The aim of this work is to structurally characterize chitosan-zinc oxide nanoparticles (CS-ZnO NPs) films in a wide range of NPs concentration (0–20 wt.%). Dielectric, conductivity, mechanical, and piezoelectric properties are assessed by using thermogravimetry, FTIR, XRD, mechanical, and dielectric...
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MDPI AG
2020-09-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/9/1991 |
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| author | Evgen Prokhorov Gabriel Luna-Bárcenas José Martín Yáñez Limón Alejandro Gómez Sánchez Yuriy Kovalenko |
| author_facet | Evgen Prokhorov Gabriel Luna-Bárcenas José Martín Yáñez Limón Alejandro Gómez Sánchez Yuriy Kovalenko |
| author_sort | Evgen Prokhorov |
| collection | DOAJ |
| description | The aim of this work is to structurally characterize chitosan-zinc oxide nanoparticles (CS-ZnO NPs) films in a wide range of NPs concentration (0–20 wt.%). Dielectric, conductivity, mechanical, and piezoelectric properties are assessed by using thermogravimetry, FTIR, XRD, mechanical, and dielectric spectroscopy measurements. These analyses reveal that the dielectric constant, Young’s modulus, and piezoelectric constant (d<sub>33</sub>) exhibit a strong dependence on nanoparticle concentration such that maximum values of referred properties are obtained at 15 wt.% of ZnO NPs. The piezoelectric coefficient d<sub>33</sub> in CS-ZnO nanocomposite films with 15 wt.% of NPs (d<sub>33</sub> = 65.9 <i>pC/N</i>) is higher than most of polymer-ZnO nanocomposites because of the synergistic effect of piezoelectricity of NPs, elastic properties of CS, and optimum NPs concentration. A three-phase model is used to include the chitosan matrix, ZnO NPs, and interfacial layer with dielectric constant higher than that of neat chitosan and ZnO. This layer between nanoparticles and matrix is due to strong interactions between chitosan’s side groups with ZnO NPs. The understanding of nanoscale properties of CS-ZnO nanocomposites is important in the development of biocompatible sensors, actuators, nanogenerators for flexible electronics and biomedical applications. |
| first_indexed | 2024-03-10T16:39:00Z |
| format | Article |
| id | doaj.art-a799886480314e11a69d1f54974ddc8c |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T16:39:00Z |
| publishDate | 2020-09-01 |
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| record_format | Article |
| series | Polymers |
| spelling | doaj.art-a799886480314e11a69d1f54974ddc8c2023-11-20T12:12:04ZengMDPI AGPolymers2073-43602020-09-01129199110.3390/polym12091991Chitosan-ZnO Nanocomposites Assessed by Dielectric, Mechanical, and Piezoelectric PropertiesEvgen Prokhorov0Gabriel Luna-Bárcenas1José Martín Yáñez Limón2Alejandro Gómez Sánchez3Yuriy Kovalenko4Cinvestav, Unidad Querétaro, Querétaro 76230, QRO, MexicoCinvestav, Unidad Querétaro, Querétaro 76230, QRO, MexicoCinvestav, Unidad Querétaro, Querétaro 76230, QRO, MexicoCinvestav, Unidad Querétaro, Querétaro 76230, QRO, MexicoPostgraduate Department, University of Aeronautics of Querétaro, Querétaro 76278, QRO, MexicoThe aim of this work is to structurally characterize chitosan-zinc oxide nanoparticles (CS-ZnO NPs) films in a wide range of NPs concentration (0–20 wt.%). Dielectric, conductivity, mechanical, and piezoelectric properties are assessed by using thermogravimetry, FTIR, XRD, mechanical, and dielectric spectroscopy measurements. These analyses reveal that the dielectric constant, Young’s modulus, and piezoelectric constant (d<sub>33</sub>) exhibit a strong dependence on nanoparticle concentration such that maximum values of referred properties are obtained at 15 wt.% of ZnO NPs. The piezoelectric coefficient d<sub>33</sub> in CS-ZnO nanocomposite films with 15 wt.% of NPs (d<sub>33</sub> = 65.9 <i>pC/N</i>) is higher than most of polymer-ZnO nanocomposites because of the synergistic effect of piezoelectricity of NPs, elastic properties of CS, and optimum NPs concentration. A three-phase model is used to include the chitosan matrix, ZnO NPs, and interfacial layer with dielectric constant higher than that of neat chitosan and ZnO. This layer between nanoparticles and matrix is due to strong interactions between chitosan’s side groups with ZnO NPs. The understanding of nanoscale properties of CS-ZnO nanocomposites is important in the development of biocompatible sensors, actuators, nanogenerators for flexible electronics and biomedical applications.https://www.mdpi.com/2073-4360/12/9/1991chitosanzinc oxide nanoparticlesinterfacial layerdielectric spectroscopy |
| spellingShingle | Evgen Prokhorov Gabriel Luna-Bárcenas José Martín Yáñez Limón Alejandro Gómez Sánchez Yuriy Kovalenko Chitosan-ZnO Nanocomposites Assessed by Dielectric, Mechanical, and Piezoelectric Properties Polymers chitosan zinc oxide nanoparticles interfacial layer dielectric spectroscopy |
| title | Chitosan-ZnO Nanocomposites Assessed by Dielectric, Mechanical, and Piezoelectric Properties |
| title_full | Chitosan-ZnO Nanocomposites Assessed by Dielectric, Mechanical, and Piezoelectric Properties |
| title_fullStr | Chitosan-ZnO Nanocomposites Assessed by Dielectric, Mechanical, and Piezoelectric Properties |
| title_full_unstemmed | Chitosan-ZnO Nanocomposites Assessed by Dielectric, Mechanical, and Piezoelectric Properties |
| title_short | Chitosan-ZnO Nanocomposites Assessed by Dielectric, Mechanical, and Piezoelectric Properties |
| title_sort | chitosan zno nanocomposites assessed by dielectric mechanical and piezoelectric properties |
| topic | chitosan zinc oxide nanoparticles interfacial layer dielectric spectroscopy |
| url | https://www.mdpi.com/2073-4360/12/9/1991 |
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