热塑型聚酰亚胺<strong>/</strong>聚偏氟乙烯全有机复合薄膜的制备及其介电储能

doi:10.11901/1005.3093.2021.664

材料研究学报

2023, Vol. 37

Issue (2): 89-94 DOI: 10.11901/1005.3093.2021.664

研究论文

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热塑型聚酰亚胺/聚偏氟乙烯全有机复合薄膜的制备及其介电储能

马逸舟¹, 赵秋莹¹, 杨路², 裘进浩¹(

)

^1.南京航空航天大学机械结构力学及控制国家重点实验室南京 210016
^2.河海大学力学与材料学院南京 210098

Preparation and Dielectric Energy Storage Properties of Thermoplastic Polyimide/Polyvinylidene Fluoride Composite Film

MA Yizhou¹, ZHAO Qiuying¹, YANG Lu², QIU Jinhao¹(

)

^1.State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
^2.College of Mechanics and Materials, Hohai University, Nanjing 210098, China

引用本文:

马逸舟, 赵秋莹, 杨路, 裘进浩. 热塑型聚酰亚胺/聚偏氟乙烯全有机复合薄膜的制备及其介电储能[J]. 材料研究学报, 2023, 37(2): 89-94.
Yizhou MA, Qiuying ZHAO, Lu YANG, Jinhao QIU. Preparation and Dielectric Energy Storage Properties of Thermoplastic Polyimide/Polyvinylidene Fluoride Composite Film[J]. Chinese Journal of Materials Research, 2023, 37(2): 89-94.

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摘要:

将聚酰亚胺(PI)与PVDF分别溶于N，N-二甲基甲酰胺(DMF)，共混后滴入酒精与纯水的混合液中析出絮状物，将絮状物收集干燥后热压制备出热塑型聚酰亚胺/聚偏氟乙烯全有机复合薄膜。使用SEM、XRD、DSC和介电、铁电测试等手段对其表征，研究了这种材料的相容性、结晶行为和储能性能。结果表明：这种PI/PVDF全有机复合储能薄膜结合紧密，分布均匀。PI的加入促进了PVDF中γ相结构的生成，对PVDF薄膜击穿性能的影响较小，明显提高了全有机薄膜的储能性能。PI的添加量为5%的复合薄膜，在300 MV·m^-1电场下可释放储能密度6.52 J·cm^-3，约为相同条件下纯PVDF薄膜的1.4倍。

关键词 ：有机高分子材料, 储能性能, 热压法, 聚酰亚胺, 聚偏氟乙烯

Abstract：

Polyimide (PI) and polyvinylidene fluoride (PVDF) were dissolved in N, N-dimethylformamide (DMF) separately, and the two solutions were blended, then the blending was dropped gradually into a mixture of alcohol and pure water to generate precipitated floccules. Finally, the floccule was collected and dried, then hot-pressed to prepare the all-organic composite film of thermoplastic polyimide/polyvinylidene fluoride. The compatibility, crystallization behavior, and energy storage performance of the composite film were characterized by means of SEM, XRD, DSC, dielectric and ferroelectric tests. It follows that the PI/PVDF film prepared by this method is compact and uniform with only few voids. The addition of PI promotes the formation of γ-phase, but has little effect on the breakdown performance of PVDF film, while obviously improves its energy storage performance. When the addition amount of PI is 5%, a high energy storage density of 6.52 J·cm^-3 can be generated by an electric field of 300 MV·m^-1, which is about 1.4 times that of pure PVDF film in the same condition.

Key words： organic polymer materials energy storage hot-pressing PI PVDF

收稿日期: 2021-12-02

ZTFLH:

TB332

基金资助:国家重点研发计划(2021YFB3400100)

作者简介: 马逸舟，男，1997年生，硕士生

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图1 PI/PVDF复合薄膜的制备流程

图2 PI/PVDF复合薄膜截面的SEM形貌和(f-i)20/80组分的SEM元素映射图

图3 PI/PVDF复合薄膜的XRD谱

图4 PI/PVDF复合薄膜的DSC曲线和结晶度

图5 PI/PVDF复合薄膜的介电和铁电性能

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