Coordination of Ultralow Permittivity and Higher Thermal Conductivity of Polyimide Induced by Unique Interfacial Self‐Assembly Behavior

Xiaodi Dong; Baoquan Wan; Langbiao Huang; Quanliang Zhao; Ruifeng Yao; Jinghui Gao; Can Ding; Xu Wang; Zhi‐Min Dang; George Chen; Jun‐Wei Zha

doi:10.1002/adfm.202417843

journal article·2025-03Open access

Coordination of Ultralow Permittivity and Higher Thermal Conductivity of Polyimide Induced by Unique Interfacial Self‐Assembly Behavior

Xiaodi Dong, Baoquan Wan, Langbiao Huang, Quanliang Zhao, Ruifeng Yao, Jinghui Gao, Can Ding, Xu Wang, Zhi‐Min Dang, George Chen, Jun‐Wei Zha

Advanced Functional Materials· Volume 35· Issue 13

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Abstract

Abstract Upgrading the available dielectric materials is the most effective approach to solve the poor quality of signal transmission and heat buildup caused by high density integration. In this work, a design strategy for multilayer 3D porous composite networks is proposed, relying on the self‐assembly effect of “crystal‐like phase” to achieve the synergistic optimization of low permittivity and high thermal conductivity of polyimide. The obtained three‐layer porous polyimide composite film (PSLS) features an ultralow permittivity of 1.89, an in‐plane thermal conductivity as high as 13.58 W m⁻¹ K⁻¹, and maintains well electrical insulating property. Inspiringly, the first digital thermoacoustic generator with wide frequency response has been designed based on PSLS film. It achieves sound pressure levels up to 60.1 dB in the 20–100 kHz range and integrates the efficient sound generation of an ultrasonic generator with real‐time display. This work will provide a novel concept material for the smart electronics and electrical fields.

Source: crossref · Quality: baseline

Research context

Composites

OpenAlex topics: Synthesis and properties of polymers · Dielectric materials and actuators · Tribology and Wear Analysis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemistry and Biological Engineering University of Science and Technology Beijing Beijing 100083 China

State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing 100084 China

School of Mechanical and Materials Engineering North China University of Technology Beijing 100144 China

State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiao Tong University Xi'an 710049 China

School of Electrical Engineering and New Energy China Three Gorges University Hubei 443002 China

State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China

Department of Electronics and Computer Science University of Southampton Southampton SO17 1BJ UK

Funding

National Natural Science Foundation of China

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