| PVDF/CNTs/Ni 复合材料的制备与介电性能 |
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| 引用本文：武丽荣,杨丹丹,赵玉玉.PVDF/CNTs/Ni 复合材料的制备与介电性能[J].上海第二工业大学(中文版),2019,(3):171-176 |
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| 基金项目:上海第二工业大学校基金(EGD19XQD04), 上海第二工业大学研究生项目基金(EGD18YJ0039) 资助 |
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| 中文摘要:为提高电介质材料介电性能, 选用聚偏氟乙烯(polyvinylidene fluoride, PVDF) 为基体, 碳纳米管(carbon
nanotubes, CNTs) 和镍粉(nickel powder, Ni) 为填料, 用溶液共混- 热压法制备了PVDF/CNTs/Ni 复合材料。采用X
射线衍射仪(XRD) 表征复合材料的微观结构, 发现填料CNTs 和Ni 的加入促进了PVDF 中的? 相结构向ˉ 相结
构转变, 这有利于提高复合材料的介电常数。通过对复合材料介电性能的研究发现, 当填料质量分数为4.1% 时,
在102 Hz 时PVDF/CNTs/Ni 复合材料的介电常数可以达到38.9, 介电损耗约为5.9。复合材料的介电常数相比纯
PVDF 皆有显著提高。热导率测试表明, 当填料质量分数为5.1% 时, 复合材料的热导率可达到0.908 W/(m￠K)。这为
研发高导热性能的电介质复合材料提供了一种思路。 |
| 中文关键词:聚偏氟乙烯 碳纳米管 复合材料 介电常数 热导率 |
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| Preparation and Dielectric Properties of PVDF/CNTs/Ni Composites |
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| Abstract:Polyvinylvinylidene fluoride (PVDF) as matrix, carbon nanotubes (CNTs) and nickel powder (Ni) as fillter, PVDF/CNTs/Ni
composites were prepared by soluion blending and hot-press processing to improve dielectric properties of dielectric materials. X-ray
diffractometry (XRD) was used to characterize the microstructure of the composites. It is found that the addition of CNT and Ni promotes
the transformation from ? phase to ˉ phase structure in PVDF, and it is beneficial to improve the dielectric constant of the composite.
The dielectric properties of composites were studied. The dielectric constant of the PVDF/CNTs/Ni composite can reach 38.9 and the
dielectric loss is about 5.9 when the total filler content is 4.1% and frequency at 102 Hz. The dielectric constants of the composites
are significantly improved compared to that of pure PVDF. The thermal conductivity test shows that the thermal conductivity of the
composite can reach 0.908 W/(m￠K) when the total content of the filler is 5.1%. It provides an idea for the development of dielectric
composites with high thermal conductivity. |
| keywords:polyvinylidene fluoride carbon nanotubes composite dielectric constant thermal conductivity |
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