期刊
POLYMERS FOR ADVANCED TECHNOLOGIES
卷 33, 期 1, 页码 427-439出版社
WILEY
DOI: 10.1002/pat.5527
关键词
bis(quinoline amine); fluorine functionalized graphene oxide; hydrophobic behavior; low dielectric constant; polyimide matrix and composites; thermal stability; UV shielding behavior
资金
- Defence Research and Development Organization, New Delhi, India [ERIP/ER/DG-NS&M/991115704/M/01/1707]
- Department of Science and Technology, Government of India [CRG/2019/002512]
Polyimide nanocomposites with low dielectric constant and UV shielding properties were successfully developed using in-situ polymerization filled with fluorinated graphene oxide. The study observed that the water contact angle of polyimide increased with the increment of FGO, with the highest contact angle of 108 degrees obtained for 15 wt% FGO reinforced polyimide composite. The dielectric constant values for neat, 1, 5, and 15 wt% FGO reinforced polyimide composites were 4.5, 3.7, 2.6, and 2.0, respectively, indicating improved dielectric behavior. Additionally, UV-Vis spectroscopy analysis showed good UV shielding behavior in FGO reinforced polyimide composites.
Polyimide nanocomposites having low-k and UV shielding properties have been developed using fluorine functionalized graphene oxide and bis(quinoline amine) based polyimide. The polyimide was synthesized using bis(quinoline amine) and pyromellitic dianhydride at appropriate experimental conditions, and its molecular structure was confirmed through various spectral analysis such as FTIR and NMR. The polyimide (PI) composites were prepared using bis(quinoline amine), pyromellitic dianhydride, and separately filled with 1, 5, 10 wt% of fluorinated graphene oxide (FGO) through in situ polymerization. The polymer composites were characterized using thermo gravimetric analysis (TGA), X-ray powder diffraction (XRD), and scanning electron microscopy (SEM). In addition, the water contact angle, dielectric behavior, and UV-Vis shielding behavior of FGO/PI composites were evaluated. The value of the water contact angle of the polyimide was increased with increment of FGO in the polyimide matrix. The highest water contact angle of polyimide composites observed 108 degrees was obtained for 15 wt% FGO reinforced polyimide composite. The value of the dielectric constant for neat, 1, 5, and 15 wt% FGO reinforced polyimide composites was obtained as 4.5, 3.7, 2.6, and 2.0, respectively. It is also observed from by UV-Vis spectroscopy analysis that the FGO reinforced polyimide composites have good UV shielding behavior.
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