Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition
Materials that exhibit the photo-induced magnetic-phase transition of titania are receiving significant attention because they can be easily switched between diamagnetism and paramagnetism by UV irradiation. However, it is difficult to store photo-induced titanium (Ti<sup>3+</sup>) in ai...
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| Format: | Article |
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MDPI AG
2020-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/1/5 |
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| author | Shuta Hara Sei Kurebayashi Genza Sanae Shota Watanabe Takehiro Kaneko Takeshi Toyama Shigeru Shimizu Hiroki Ikake |
| author_facet | Shuta Hara Sei Kurebayashi Genza Sanae Shota Watanabe Takehiro Kaneko Takeshi Toyama Shigeru Shimizu Hiroki Ikake |
| author_sort | Shuta Hara |
| collection | DOAJ |
| description | Materials that exhibit the photo-induced magnetic-phase transition of titania are receiving significant attention because they can be easily switched between diamagnetism and paramagnetism by UV irradiation. However, it is difficult to store photo-induced titanium (Ti<sup>3+</sup>) in air because of its easy oxidation upon oxygen exposure. In this study, titania/polycarbonate hybrid films were prepared using linear 1,6-hexanediol (PHMCD), cyclic 1,4-cyclohexanedimethanol (PCHCD), or their copolymerized carbonate oligomers using the sol–gel method. The oxygen permeability of the hybrid film decreased as the ratio of the ring structure increased by a factor of approximately 32 from PHMCD with only the chain structure to PCHCD with only the ring structure. These hybrid films can generate Ti<sup>3+</sup> under a UV irradiation of 250 W for 2 h, and the difference in oxygen permeability significantly affected the lifetime of the Ti<sup>3+</sup> by a factor of up to 120. In addition, the tensile tests and IR measurements demonstrated that UV irradiation had little effect on the mechanical intensity and matrix chemical structure. Moreover, the magnetic susceptibility of Ti<sup>3+</sup> present in PCHCD was confirmed to be 6.2 (10<sup>−3</sup> emu/g(titania)) under an external magnetic field of 5 T induced using a superconducting quantum interference device. |
| first_indexed | 2024-03-10T13:51:42Z |
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| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T13:51:42Z |
| publishDate | 2020-12-01 |
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| series | Nanomaterials |
| spelling | doaj.art-ad90ca4c5db54869bb7629a4590a320e2023-11-21T02:07:01ZengMDPI AGNanomaterials2079-49912020-12-01111510.3390/nano11010005Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase TransitionShuta Hara0Sei Kurebayashi1Genza Sanae2Shota Watanabe3Takehiro Kaneko4Takeshi Toyama5Shigeru Shimizu6Hiroki Ikake7Department of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14 Kandasurugadai, Chiyoda-ku, Tokyo 101-8308, JapanDepartment of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14 Kandasurugadai, Chiyoda-ku, Tokyo 101-8308, JapanDepartment of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14 Kandasurugadai, Chiyoda-ku, Tokyo 101-8308, JapanDepartment of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14 Kandasurugadai, Chiyoda-ku, Tokyo 101-8308, JapanDepartment of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14 Kandasurugadai, Chiyoda-ku, Tokyo 101-8308, JapanDepartment of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14 Kandasurugadai, Chiyoda-ku, Tokyo 101-8308, JapanDepartment of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14 Kandasurugadai, Chiyoda-ku, Tokyo 101-8308, JapanDepartment of Materials and Applied Chemistry, College of Science and Technology, Nihon University, 1-8-14 Kandasurugadai, Chiyoda-ku, Tokyo 101-8308, JapanMaterials that exhibit the photo-induced magnetic-phase transition of titania are receiving significant attention because they can be easily switched between diamagnetism and paramagnetism by UV irradiation. However, it is difficult to store photo-induced titanium (Ti<sup>3+</sup>) in air because of its easy oxidation upon oxygen exposure. In this study, titania/polycarbonate hybrid films were prepared using linear 1,6-hexanediol (PHMCD), cyclic 1,4-cyclohexanedimethanol (PCHCD), or their copolymerized carbonate oligomers using the sol–gel method. The oxygen permeability of the hybrid film decreased as the ratio of the ring structure increased by a factor of approximately 32 from PHMCD with only the chain structure to PCHCD with only the ring structure. These hybrid films can generate Ti<sup>3+</sup> under a UV irradiation of 250 W for 2 h, and the difference in oxygen permeability significantly affected the lifetime of the Ti<sup>3+</sup> by a factor of up to 120. In addition, the tensile tests and IR measurements demonstrated that UV irradiation had little effect on the mechanical intensity and matrix chemical structure. Moreover, the magnetic susceptibility of Ti<sup>3+</sup> present in PCHCD was confirmed to be 6.2 (10<sup>−3</sup> emu/g(titania)) under an external magnetic field of 5 T induced using a superconducting quantum interference device.https://www.mdpi.com/2079-4991/11/1/5networksnanocompositespolycarbonatesmagnetic polymersoligomersSmall Angle X-ray Scattering (SAXS) |
| spellingShingle | Shuta Hara Sei Kurebayashi Genza Sanae Shota Watanabe Takehiro Kaneko Takeshi Toyama Shigeru Shimizu Hiroki Ikake Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition Nanomaterials networks nanocomposites polycarbonates magnetic polymers oligomers Small Angle X-ray Scattering (SAXS) |
| title | Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
| title_full | Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
| title_fullStr | Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
| title_full_unstemmed | Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
| title_short | Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
| title_sort | polycarbonate titania hybrid films with localized photo induced magnetic phase transition |
| topic | networks nanocomposites polycarbonates magnetic polymers oligomers Small Angle X-ray Scattering (SAXS) |
| url | https://www.mdpi.com/2079-4991/11/1/5 |
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