Effect of the Two-Dimensional Magnetostrictive Fillers of CoFe<sub>2</sub>O<sub>4</sub>-Intercalated Graphene Oxide Sheets in 3-2 Type Poly(vinylidene fluoride)-Based Magnetoelectric Films
In the last decade, magnetoelectric (ME) polymer films have been developed by including zero-dimensional or one-dimensional magnetostrictive fillers in a piezoelectric polymer matrix. Existing reports on ME polymer films reveal that the shape of the magnetostrictive fillers is a critical determinant...
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MDPI AG
2021-05-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/11/1782 |
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| author | Geunryeol Baek Su-Chul Yang |
| author_facet | Geunryeol Baek Su-Chul Yang |
| author_sort | Geunryeol Baek |
| collection | DOAJ |
| description | In the last decade, magnetoelectric (ME) polymer films have been developed by including zero-dimensional or one-dimensional magnetostrictive fillers in a piezoelectric polymer matrix. Existing reports on ME polymer films reveal that the shape of the magnetostrictive fillers is a critical determinant of the polymeric phase conformation, strain transfer between the piezoelectric and magnetostrictive phases, and dipole alignment in the films. In this study, to investigate the effect of two-dimensional (2D) magnetostrictive fillers on piezoelectric, magnetic, and magnetoelectric responses, 3-2 type ME films were prepared using CoFe<sub>2</sub>O<sub>4</sub>-intercalated graphene oxide (CFO-i-GO) fillers and poly(vinylidene fluoride) (PVDF) polymers. The 2D fillers of CFO-i-GO were hydrothermally synthesized by CFO intercalation into the interlayers of GO sheets with different lateral sizes, which were controlled by ultrasonication treatment. It was found that the large-lateral-size GO (LGO), medium-lateral-size GO (MGO), and small-lateral-size GO (SGO) fillers in the PVDF-based ME films exhibited a lateral size effect on CFO intercalation, polymeric phase conformation, dipole alignment, and magnetoelectric responses. A maximum ME coefficient (<i>α</i><sub>ME</sub>) of 3.0 mV/cm∙Oe was achieved with a strong linearity (r<sup>2</sup>) of 0.9992 at an off-resonance frequency (<i>f</i>) of 1 kHz and applied direct current (dc) magnetic field (<i>H</i><sub>dc</sub>) of ± 1000 Oe. The 3-2 type polymer-based ME films with reliable ME responses have potential for use in high-feasibility ME devices for biomedical sensing applications. |
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| last_indexed | 2024-03-10T10:56:06Z |
| publishDate | 2021-05-01 |
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| series | Polymers |
| spelling | doaj.art-ecbe4aa494234ca3ae4c45512b21cd7a2023-11-21T21:55:08ZengMDPI AGPolymers2073-43602021-05-011311178210.3390/polym13111782Effect of the Two-Dimensional Magnetostrictive Fillers of CoFe<sub>2</sub>O<sub>4</sub>-Intercalated Graphene Oxide Sheets in 3-2 Type Poly(vinylidene fluoride)-Based Magnetoelectric FilmsGeunryeol Baek0Su-Chul Yang1Department of Chemical Engineering (BK21 FOUR Graduate Program), Dong-A University, Busan 49315, KoreaDepartment of Chemical Engineering (BK21 FOUR Graduate Program), Dong-A University, Busan 49315, KoreaIn the last decade, magnetoelectric (ME) polymer films have been developed by including zero-dimensional or one-dimensional magnetostrictive fillers in a piezoelectric polymer matrix. Existing reports on ME polymer films reveal that the shape of the magnetostrictive fillers is a critical determinant of the polymeric phase conformation, strain transfer between the piezoelectric and magnetostrictive phases, and dipole alignment in the films. In this study, to investigate the effect of two-dimensional (2D) magnetostrictive fillers on piezoelectric, magnetic, and magnetoelectric responses, 3-2 type ME films were prepared using CoFe<sub>2</sub>O<sub>4</sub>-intercalated graphene oxide (CFO-i-GO) fillers and poly(vinylidene fluoride) (PVDF) polymers. The 2D fillers of CFO-i-GO were hydrothermally synthesized by CFO intercalation into the interlayers of GO sheets with different lateral sizes, which were controlled by ultrasonication treatment. It was found that the large-lateral-size GO (LGO), medium-lateral-size GO (MGO), and small-lateral-size GO (SGO) fillers in the PVDF-based ME films exhibited a lateral size effect on CFO intercalation, polymeric phase conformation, dipole alignment, and magnetoelectric responses. A maximum ME coefficient (<i>α</i><sub>ME</sub>) of 3.0 mV/cm∙Oe was achieved with a strong linearity (r<sup>2</sup>) of 0.9992 at an off-resonance frequency (<i>f</i>) of 1 kHz and applied direct current (dc) magnetic field (<i>H</i><sub>dc</sub>) of ± 1000 Oe. The 3-2 type polymer-based ME films with reliable ME responses have potential for use in high-feasibility ME devices for biomedical sensing applications.https://www.mdpi.com/2073-4360/13/11/1782magnetoelectric polymer composite filmspoly(vinylidene fluoride)CoFe<sub>2</sub>O<sub>4</sub>-intercalated graphene oxidestwo-dimensional magnetostrictive fillers |
| spellingShingle | Geunryeol Baek Su-Chul Yang Effect of the Two-Dimensional Magnetostrictive Fillers of CoFe<sub>2</sub>O<sub>4</sub>-Intercalated Graphene Oxide Sheets in 3-2 Type Poly(vinylidene fluoride)-Based Magnetoelectric Films Polymers magnetoelectric polymer composite films poly(vinylidene fluoride) CoFe<sub>2</sub>O<sub>4</sub>-intercalated graphene oxides two-dimensional magnetostrictive fillers |
| title | Effect of the Two-Dimensional Magnetostrictive Fillers of CoFe<sub>2</sub>O<sub>4</sub>-Intercalated Graphene Oxide Sheets in 3-2 Type Poly(vinylidene fluoride)-Based Magnetoelectric Films |
| title_full | Effect of the Two-Dimensional Magnetostrictive Fillers of CoFe<sub>2</sub>O<sub>4</sub>-Intercalated Graphene Oxide Sheets in 3-2 Type Poly(vinylidene fluoride)-Based Magnetoelectric Films |
| title_fullStr | Effect of the Two-Dimensional Magnetostrictive Fillers of CoFe<sub>2</sub>O<sub>4</sub>-Intercalated Graphene Oxide Sheets in 3-2 Type Poly(vinylidene fluoride)-Based Magnetoelectric Films |
| title_full_unstemmed | Effect of the Two-Dimensional Magnetostrictive Fillers of CoFe<sub>2</sub>O<sub>4</sub>-Intercalated Graphene Oxide Sheets in 3-2 Type Poly(vinylidene fluoride)-Based Magnetoelectric Films |
| title_short | Effect of the Two-Dimensional Magnetostrictive Fillers of CoFe<sub>2</sub>O<sub>4</sub>-Intercalated Graphene Oxide Sheets in 3-2 Type Poly(vinylidene fluoride)-Based Magnetoelectric Films |
| title_sort | effect of the two dimensional magnetostrictive fillers of cofe sub 2 sub o sub 4 sub intercalated graphene oxide sheets in 3 2 type poly vinylidene fluoride based magnetoelectric films |
| topic | magnetoelectric polymer composite films poly(vinylidene fluoride) CoFe<sub>2</sub>O<sub>4</sub>-intercalated graphene oxides two-dimensional magnetostrictive fillers |
| url | https://www.mdpi.com/2073-4360/13/11/1782 |
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