Highly Stretchable CIP–PDMS Composites with Partial Interface Bonding for Electromagnetic Noise Suppression in GHz Frequency Range

Heebo Ha, Nadeem Qaiser, Jong Hyeon Jeong, Kyungsub Lee, Byungil Hwang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

With the technological progress of wearable electronics operated in 5 G network communication system, a stretchable noise suppressor at GHz bandwidth that is reliable under severe deformation coming from the user’s motion should be developed. However, current material systems for the noise suppressor showed a limited stretchability. This study introduces a carbonyl iron powder – polydimethylsiloxane (CIP – PDMS) composite with partially bonded interface as a solution to enhance the stretchability. Modulation of CIP surface to have the partial interface bonding (CIP-PID) results in the ultra large strain of ~165% even at the 40 vol% of CIP-PIDs, while only ~71% of strain is observed for CIPs with the full interface bonding (CIP-FID). According to a microstructural analysis and FEM simulation of the strained composite specimens, when partially bonded to CIP at the interface, the PDMS matrix forms a free surface that can be deformed like pure PDMS, resulting in high stretchability. The wettability of CIP offers protection against eddy current loss while retaining strong magnetic properties, suppressing the EM noise. Thus, the approach eliminates the tradeoff between EM suppression and stretchability.
Original languageEnglish (US)
Pages (from-to)1-14
Number of pages14
JournalJournal of Natural Fibers
DOIs
StatePublished - Oct 7 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-10-10
Acknowledgements: The work was supported by the National Research Foundation of Korea [2022R1F1A1063696]; National Research Foundation of Korea [2021K1A3A1A74096164].

ASJC Scopus subject areas

  • Materials Science (miscellaneous)

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