Enhanced dielectric properties of poly(dimethyl siloxane) based composites with modified MXene

IF 9.8 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology Pub Date : 2025-07-30 DOI:10.1016/j.compscitech.2025.111314

Zi-Long Zhang , Liang Tao , Jing-Wen Wang , Ying-Jie Ma , Yang Zhang

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引用次数: 0

Abstract

The focus on composite films with high dielectric properties is largely attributable to their extensive range of applications in electrical equipment. Nevertheless, there is a recognized issue concerning the fact that the dielectric properties of the materials do not fully satisfy the mounting performance requirements in practical applications. In this work, the heterostructure of MnO₂ grown on the surface of 2D transition metal carbide Ti₃C₂ MXene doped with carbon quantum dots (CD-MnO₂@MXene) has been successfully obtained through hydrothermal reaction. CD-MnO₂@MXene was combined with poly (dimethyl siloxane)-based copolymers (D-PDMS) to form the PDMS-based dielectric composites (CD-MnO₂@MXene/D-PDMS) via solution casting method. The CD-MnO₂@MXene/D-PDMS composite containing 2.17 vol% of CD-MnO₂@MXene exhibits an enhanced dielectric constant of 42.2 at 100 Hz, which is 12 times and 1.58 times higher than that of the pure matrix and the CD@MXene/D-PDMS composite, meanwhile the loss is only 0.07. These results validate that the CD-MnO₂@MXene/D-PDMS composite possesses excellent dielectric properties and low energy loss compared with other nanocomposites, thus can be widely used in advanced electronic devices such as actuators and sensors.

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改性MXene增强聚二甲基硅氧烷基复合材料介电性能

人们对具有高介电性能的复合薄膜的关注很大程度上归因于它们在电气设备中的广泛应用。然而，有一个公认的问题，即材料的介电性能不能完全满足实际应用中的安装性能要求。本文通过水热反应，成功获得了掺杂碳量子点（CD-MnO2@MXene）的二维过渡金属碳化物Ti3C2 MXene表面生长的MnO2异质结构。将CD-MnO2@MXene与聚二甲基硅氧烷基共聚物（D-PDMS）通过溶液浇铸法制备pdms基介电复合材料（CD-MnO2@MXene/D-PDMS）。含有2.17体积% CD-MnO2@MXene的CD-MnO2@MXene/D-PDMS复合材料在100 Hz时的介电常数为42.2，分别是纯基体和CD@MXene/D-PDMS复合材料的12倍和1.58倍，而损耗仅为0.07。这些结果验证了CD-MnO2@MXene/D-PDMS复合材料与其他纳米复合材料相比具有优异的介电性能和低的能量损耗，因此可以广泛应用于执行器和传感器等先进电子器件中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.