Influence of BaTiO3 Nanowire Aspect Ratio on Dielectric Property of Poly (Metaphenylene Isophthalamide) Composite
DUAN Guangyu1, HU Jingwen2, HU Zuming2, YU Xiang1, CHI Changlong1, LI Yue1()
1.College of Materials Engineering, Henan University of Engineering, Zhengzhou 450007, China 2.State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
Cite this article:
DUAN Guangyu, HU Jingwen, HU Zuming, YU Xiang, CHI Changlong, LI Yue. Influence of BaTiO3 Nanowire Aspect Ratio on Dielectric Property of Poly (Metaphenylene Isophthalamide) Composite. Chinese Journal of Materials Research, 2022, 36(7): 527-535.
The BaTiO3 nanowires (BTN) with different aspect ratios were synthesized through hydrothermal method, and polyvinylpyrrolidone (PVP) was used to adjust the surface chemical energy and electrostatic force of BTN (named as P-BTN). Subsequently, P-BTN were added into poly(metaphenylene isophthalamide) (PMIA) matrix to prepare PMIA dielectric composites containing 10% P-BTN (mass fraction) with different aspect ratios. The influence of synthesized temperature on aspect ratio of BTN was investigated, and the effect of P-BTN with different aspect ratios on dielectric and electrical properties of PMIA composites as well as dielectric and electrical properties of P-BTN/PMIA composites at different temperatures were also investigated. The results show that with increase of synthetic temperature of BTN precursor, the aspect ratios of synthesized BTN significantly increased from 7.2 (130℃) to 46 (250℃). With increment of the aspect ratio of P-BTN in PMIA composites the dielectric constants of corresponding composites increased from 6.6 to 9.8. At the same time, the dielectric losses of all composites were less than 0.025 in entire frequency range. Furthermore, the prepared composites with different aspect ratios of P-BTN also maintained satisfied insulation performance. The dielectric constant and dielectric loss in the range of -20℃ to 200℃ of P-BTN-250-10 composite maintains stable. This P-BTN/PMIA composites can further increase the energy storage density.
Fund: Natural Science Foundation of China(51608175);Program for Science and Technology Innovation Talent in Universities of Henan Province(20HASTIT016);Key Scientific and Technological Project of Henan Province(202102310605)
Fig.2 Schematic diagram of preparation of P-BTN/PMIA composite (T represents 130, 160, 190, 220 and 250)
Fig.3 SEM images of synthesized BTN (a) BTN-130, (b) BTN-160, (c) BTN-190, (d) BTN-220, (e) & (f) BTN-250; (g) SEM image of P-BTN-250; (h) Cross sectional morphology of P-BTN-250-10 composite
Fig.4 Length distribution and diameter distribution of BTN and the relationship between BTN aspect ratio and synthesized temperature
Fig.5 XRD spectra of BT and BTN-190 (a), FTIR spectra of BTN-190 and P-BTN-190 (b) and XPS spectra of BTN-190 and P-BTN-190 (c)
Fig.6 Dielectric constant (a, b), dielectric loss (c), conductivity (d) of PMIA composites with 10% different aspect ratios of P-BTN
Fig.7 Dielectric constant (a), dielectric loss (b), conductivity (c) of P-BTN-250-10 as a function of temperature
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