| Autor: |
Li, Chaoqun, Zhao, Xiaojia, Wang, Qi, Chen, Shunzhong, Yin, Fangqian, Lan, Jianru, Qi, Ruiyue, Peng, Guirong |
| Předmět: |
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| Zdroj: |
Journal of Inorganic & Organometallic Polymers & Materials; Oct2024, Vol. 34 Issue 10, p4524-4532, 9p |
| Abstrakt: |
Polymer-based composites with excellent dielectric properties are vital component in the electronics and power systems. In order to improve dielectric constant and reduce loss of polymer, a series of flexible PVDF-based composite films containing functionalized graphene were prepared in this work. The results of TEM, FTIR, TG, and XPS showed that Methyltetrahydrophthalic Anhydride (MeTHPA) was successfully grafted onto the surface of graphene nanosheets. SEM indicated that grafted graphene nanosheets are uniformly dispersed in PVDF. Brunauer Emmett Teller (BET) analysis suggested that MGNP-PVDF composite film with a dense structure was fabricated. Compared with the PVDF-based composite film with un-grafted GNP, the introduction of MeTHPA-GNP remarkably enhanced the dielectric properties and restricted the dielectric loss and conductivity of the MGNP-PVDF composite films. When content of MeTHPA-GNP filler was 3.5%, the dielectric constant of the composite film reached 62 under 1 kHz at room temperature, and the dielectric loss maintained a low value of 0.425. The above-mentioned outstanding properties are owing to the compatibility of the ester groups in the grafted graphene nanosheets and the ester groups in the epoxy resin. This is caused by the effective encapsulation of MeTHPA molecules grafted on the surface of graphene nanosheets. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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