Density-tunable lightweight polymer composites with dual-functional ability of efficient EMI shielding and heat dissipation. Issue 36 (11th July 2017)

• Record Type: Journal Article
• Authors: Lee, Seung Hwan; Yu, Seunggun; Shahzad, Faisal; Kim, Woo Nyon; Park, Cheolmin; Hong, Soon Man; Koo, Chong Min
• Is Part Of: Nanoscale. Volume 9:Issue 36(2017)
• Page Start: 13432
• Page End: 13440
• Publication Date: 2017-07-11
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c7nr02618h
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : We report a simple and effective way to fabricate the lightweight metal-based polymer composites with dual-functional performance of excellent EMI shielding and thermal conductivity. Abstract : 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.