Improving dielectric constant and breakdown strength of CaCu3Ti4O12/millable polyurethane composite films with Ti3C2Tx MXene

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-03-14 DOI:10.1016/j.materresbull.2025.113435

Wei Wan , Jie Zhou , Yan Li , Jiamin Xiao , Junrong Luo , Yuqian Yang , Lei Yu , Yuejun Ouyang

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Abstract

Flexible dielectrics with exceptional dielectric properties are highly desirable for various electronic applications. In this study, we successfully fabricated CaCu₃Ti₄O₁₂ (CCTO)/Ti₃C₂T_x MXene/millable polyurethane (MPU) ternary composite films via a combination of mixing and hot compression techniques. The incorporation of 2D Ti₃C₂T_x MXene nanosheets at a mass fraction of 4 % significantly enhanced the dielectric properties of the composite films. Specifically, the dielectric constant at 100 Hz increased to 41.1, representing a 14.48 % improvement over the initial CCTO/MPU composite. Meanwhile, the dielectric loss remained low at 0.050, with only a marginal increase of 2.04 %. Additionally, the breakdown strength of the composite films was notably boosted to 19.15 kV/mm, demonstrating a 15.3 % enhancement. These findings highlight the substantial improvement in the dielectric performance of the CCTO/Ti₃C₂T_x/MPU ternary composite films, showcasing their potential for high-performance electronic applications.

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Ti3C2Tx MXene提高cuu3ti4o12 /millable聚氨酯复合膜的介电常数和击穿强度

具有特殊介电性能的柔性介质在各种电子应用中是非常理想的。在本研究中，我们通过混合和热压缩技术的结合，成功制备了ccu3ti4o12 (CCTO)/Ti3C2Tx MXene/millable聚氨酯（MPU）三元复合薄膜。质量分数为4%的二维Ti3C2Tx MXene纳米片的掺入显著提高了复合膜的介电性能。具体来说，100 Hz时的介电常数增加到41.1，比最初的CCTO/MPU复合材料提高了14.48%。同时，介质损耗保持在0.050的低位，仅微增2.04%。此外，复合膜的击穿强度显著提高到19.15 kV/mm，提高了15.3%。这些发现突出了CCTO/Ti3C2Tx/MPU三元复合薄膜介电性能的实质性改善，展示了其在高性能电子应用中的潜力。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.