Density-tunable lightweight polymer composites with dual-functional ability of efficient EMI shielding and heat dissipation

Seung Hwan Lee, Seunggun Yu, Faisal Shahzad, Woo Nyon Kim, Cheolmin Park, Soon Man Hong, Chong Min Koo

Research output: Contribution to journalArticlepeer-review

104 Citations (Scopus)


Lightweight dual-functional materials with high EMI shielding performance and thermal conductivity are of great importance in modern cutting-edge applications, such as mobile electronics, automotive, aerospace, and military. Unfortunately, a clear material solution has not emerged yet. Herein, we demonstrate a simple and effective way to fabricate lightweight metal-based polymer composites with dual-functional ability of excellent EMI shielding effectiveness and thermal conductivity using expandable polymer bead-templated Cu hollow beads. The low-density Cu hollow beads (ρ ∼ 0.44 g cm-3) were fabricated through electroless plating of Cu on the expanded polymer beads with ultralow density (ρ ∼ 0.02 g cm-3). The resulting composites that formed a continuous 3D Cu network with a very small Cu content (∼9.8 vol%) exhibited excellent EMI shielding (110.7 dB at 7 GHz) and thermal conductivity (7.0 W m-1 K-1) with isotropic features. Moreover, the densities of the composites are tunable from 1.28 to 0.59 g cm-3 in accordance with the purpose of their applications. To the best of our knowledge, the resulting composites are the best lightweight dual-functional materials with exceptionally high EMI SE and thermal conductivity performance among synthetic polymer composites.

Original languageEnglish
Pages (from-to)13432-13440
Number of pages9
Issue number36
Publication statusPublished - 2017 Sept 28

Bibliographical note

Funding Information:
This work was supported by the Fundamental R&D Program for Core Technology of Materials and the Industrial Strategic Technology Development Program funded by the Ministry of Trade, Industry and Energy, Republic of Korea. This work was also partially funded by the Korea Institute of Science and Technology through the Young Fellow program. This research was also supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning.

Publisher Copyright:
© 2017 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Materials Science


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