BT@PDA增强PVDF/PMMA复合薄膜的介电与储能性能研究

doi:10.11896/cldb.24050123

材料导报

2025, Vol. 39

Issue (13): 24050123-10 https://doi.org/10.11896/cldb.24050123

高分子与聚合物基复合材料

BT@PDA增强PVDF/PMMA复合薄膜的介电与储能性能研究

黄云龙¹, 崔巍巍^1,2,*, 侯亚娟¹, 董昊霖¹

1 哈尔滨理工大学材料科学与化学工程学院,哈尔滨 150040
2 哈尔滨理工大学工程电介质及其应用教育部重点实验室,哈尔滨 150080

Enhanced Dielectric and Energy Storage Properties of PVDF/PMMA Composite Films Modified with BT@PDA

HUANG Yunlong¹, CUI Weiwei^1,2,*, HOU Yajuan¹, DONG Haolin¹

1 School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China
2 MoE Key Laboratory of Engineering Dielectrics and Its Application, Harbin University of Science and Technology, Harbin 150080, China

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摘要本工作采用多巴胺(DA)在钛酸钡(BT)纳米颗粒表面自聚合得到具有核壳结构的钛酸钡@聚多巴胺(BT@PDA)颗粒,分别将相同质量的BT和BT@PDA颗粒分散到聚偏氟乙烯/聚甲基丙烯酸甲酯(PVDF/PMMA)共混聚合物基质中,制得BT/PVDF/PMMA复合薄膜和BT@PDA/PVDF/PMMA复合薄膜。实验结果表明,PDA包覆层在提高介电常数、抑制介电损耗、提高击穿场强和改善力学性能方面发挥了积极的促进作用。室温下BT@PDA/PVDF/PMMA复合薄膜在10² Hz下介电常数达到10.9,与未加填料的PVDF/PMMA薄膜相比提升了67.7%;介电损耗为0.052,降低了32.4%;击穿场强达到606 kV/mm,提升了68.8%;放电能量密度达到10.3 J/cm³,提升了128.9%,并且充放电效率保持在58%以上。在高温(50～90 ℃)情况下,PDA包覆层在介电性能、储能性能方面仍然发挥了积极作用。70 ℃时,BT@PDA/PMMA/PVDF复合薄膜的储能密度为6.48 J/cm³,充放电效率仍然在53%以上。

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关键词: 储能密度介电性能聚偏氟乙烯(PVDF) 聚甲基丙烯酸甲酯(PMMA) BT@PDA

Abstract: This study presents the design and synthesis of core-shell structured barium titanate@polydopamine(BT@PDA) particles through the in-situ polymerization of dopamine (DA) on the surface of BT nanoparticles. An equivalent mass of pristine BT and BT@PDA particles was subsequently dispersed into a polyvinylidene fluoride/poly(methyl methacrylate) (PVDF/PMMA) copolymer matrix, resulting in composite films of BT/PVDF/PMMA and BT@PDA/PVDF/PMMA. The experimental results indicate that the PDA coating significantly enhances the dielectric constant, mitigates dielectric loss, elevates the breakdown strength, and improves mechanical properties. At room temperature, the dielectric constant of the BT@PDA/PVDF/PMMA composite film at 10²Hz reached 10.9, making a 67.7% increase over the unfilled PVDF/PMMA film;the dielectric loss was reduced by 32.4% to 0.052;the breakdown strength was raised by 68.8% to 606 kV/mm;and the discharged energy density was elevated by 128.9% to 10.3 J/cm³, with charge-discharge efficiency maintained above 58%. Furthermore, under high-temperature conditions ranging from 50 ℃ to 90 ℃, the PDA coating continues to positively affect the dielectric and energy storage properties. At 70 ℃, the energy storage density of the BT@PDA/PMMA/PVDF composite film was 6.48 J/cm³, with an efficiency exceeding 53%.

Key words: energy storage density dielectric properties polyvinylidene fluoride (PVDF) polymethyl methacrylate (PMMA) BT@PDA

出版日期: 2025-07-10 发布日期: 2025-07-21

ZTFLH:

TM215.3

基金资助: 国家自然科学基金(51603057)

通讯作者: *崔巍巍,博士,哈尔滨理工大学材料科学与化学工程学院副教授、硕士研究生导师。目前主要从事储能聚合物、传感器材料等方面的研究。cuiww@hrbust.edu.cn

作者简介: 黄云龙,哈尔滨理工大学材料科学与化学工程学院硕士研究生,在崔巍巍副教授的指导下进行研究。目前主要研究领域为聚合物基介电储能复合材料。

引用本文:

黄云龙, 崔巍巍, 侯亚娟, 董昊霖. BT@PDA增强PVDF/PMMA复合薄膜的介电与储能性能研究[J]. 材料导报, 2025, 39(13): 24050123-10.
HUANG Yunlong, CUI Weiwei, HOU Yajuan, DONG Haolin. Enhanced Dielectric and Energy Storage Properties of PVDF/PMMA Composite Films Modified with BT@PDA. Materials Reports, 2025, 39(13): 24050123-10.

链接本文:

https://www.mater-rep.com/CN/10.11896/cldb.24050123 或 https://www.mater-rep.com/CN/Y2025/V39/I13/24050123

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