Low Dielectric Properties and Transmission Loss of Polyimide/Organically Modified Hollow Silica Nanofiber Composites
In this study, a series of low dielectric constant and transmission loss of polyimide (PI)/organically modified hollow silica nanofiber (m-HSNF) nanocomposites were synthesized via two-step polymerization. Two different PIs were fabricated using two types of diamine monomers with or without fluorine...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/20/4462 |
| _version_ | 1797470129277108224 |
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| author | Shu-Yang Lin Yu-Min Ye Erh-Ching Chen Tzong-Ming Wu |
| author_facet | Shu-Yang Lin Yu-Min Ye Erh-Ching Chen Tzong-Ming Wu |
| author_sort | Shu-Yang Lin |
| collection | DOAJ |
| description | In this study, a series of low dielectric constant and transmission loss of polyimide (PI)/organically modified hollow silica nanofiber (m-HSNF) nanocomposites were synthesized via two-step polymerization. Two different PIs were fabricated using two types of diamine monomers with or without fluorine-containing groups and biphenylene structure of dianhydride. The chemical structure and morphology of the fabricated composites were characterized using Nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) and field-emission scanning electron microscopy (FESEM). The two-step polymerization process successfully manufactured and converted from polyamic acid to polyimide after thermal imidization was proved by the NMR and FTIR results. The FESEM and their related energy-dispersive X-ray spectroscopy (EDS) images of nanocomposites indicate that the m-HSNF is extremely dispersed into the polyimide matrix. The high-frequency dielectric constants of the nanocomposite materials decrease as the presence of fluorine-containing groups in diamine monomers and the loadings of the m-HSNF increase. These findings are probably attributed to the presence of the steric hindrance effect brought by trifluoromethyl groups, and the m-HSNF can disrupt the chain packing and increase the free volume, thus reducing the dielectric properties of polyimides. The transmission loss and its related uncertainty of fabricated composite materials contain excellent performance, suggesting that the fabricated materials could be used as substrate materials for 5G printed circuit board. |
| first_indexed | 2024-03-09T19:32:22Z |
| format | Article |
| id | doaj.art-195aaf070ee14debb8f4f1c37b34ba2a |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T19:32:22Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-195aaf070ee14debb8f4f1c37b34ba2a2023-11-24T02:09:52ZengMDPI AGPolymers2073-43602022-10-011420446210.3390/polym14204462Low Dielectric Properties and Transmission Loss of Polyimide/Organically Modified Hollow Silica Nanofiber CompositesShu-Yang Lin0Yu-Min Ye1Erh-Ching Chen2Tzong-Ming Wu3Department of Materials Science and Engineering, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 402, TaiwanDepartment of Materials Science and Engineering, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 402, TaiwanDepartment of Materials Science and Engineering, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 402, TaiwanDepartment of Materials Science and Engineering, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 402, TaiwanIn this study, a series of low dielectric constant and transmission loss of polyimide (PI)/organically modified hollow silica nanofiber (m-HSNF) nanocomposites were synthesized via two-step polymerization. Two different PIs were fabricated using two types of diamine monomers with or without fluorine-containing groups and biphenylene structure of dianhydride. The chemical structure and morphology of the fabricated composites were characterized using Nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) and field-emission scanning electron microscopy (FESEM). The two-step polymerization process successfully manufactured and converted from polyamic acid to polyimide after thermal imidization was proved by the NMR and FTIR results. The FESEM and their related energy-dispersive X-ray spectroscopy (EDS) images of nanocomposites indicate that the m-HSNF is extremely dispersed into the polyimide matrix. The high-frequency dielectric constants of the nanocomposite materials decrease as the presence of fluorine-containing groups in diamine monomers and the loadings of the m-HSNF increase. These findings are probably attributed to the presence of the steric hindrance effect brought by trifluoromethyl groups, and the m-HSNF can disrupt the chain packing and increase the free volume, thus reducing the dielectric properties of polyimides. The transmission loss and its related uncertainty of fabricated composite materials contain excellent performance, suggesting that the fabricated materials could be used as substrate materials for 5G printed circuit board.https://www.mdpi.com/2073-4360/14/20/4462hollow silica nanofiberspolyimidecompositedielectric constanttransmission loss |
| spellingShingle | Shu-Yang Lin Yu-Min Ye Erh-Ching Chen Tzong-Ming Wu Low Dielectric Properties and Transmission Loss of Polyimide/Organically Modified Hollow Silica Nanofiber Composites Polymers hollow silica nanofibers polyimide composite dielectric constant transmission loss |
| title | Low Dielectric Properties and Transmission Loss of Polyimide/Organically Modified Hollow Silica Nanofiber Composites |
| title_full | Low Dielectric Properties and Transmission Loss of Polyimide/Organically Modified Hollow Silica Nanofiber Composites |
| title_fullStr | Low Dielectric Properties and Transmission Loss of Polyimide/Organically Modified Hollow Silica Nanofiber Composites |
| title_full_unstemmed | Low Dielectric Properties and Transmission Loss of Polyimide/Organically Modified Hollow Silica Nanofiber Composites |
| title_short | Low Dielectric Properties and Transmission Loss of Polyimide/Organically Modified Hollow Silica Nanofiber Composites |
| title_sort | low dielectric properties and transmission loss of polyimide organically modified hollow silica nanofiber composites |
| topic | hollow silica nanofibers polyimide composite dielectric constant transmission loss |
| url | https://www.mdpi.com/2073-4360/14/20/4462 |
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