Issue 34, 2018

Integrated strength and toughness in graphene/calcium alginate films for highly efficient electromagnetic interference shielding

Abstract

Graphene films are considered promising electromagnetic interference (EMI) shielding materials in view of high electrical conductivity, light weight, and flexibility. Nevertheless, pristine graphene films exhibit only modest mechanical performance because of the weak interfaces between graphene nanosheets. We have developed an advanced graphene film that integrates excellent EMI shielding performance with improved mechanical performance, by intercalating calcium alginate (CA) molecules into reduced graphene oxide (rGO) nanosheets. The rGO/CA film exhibits an EMI shielding effectiveness (EMI SE) of 25.7 dB at only 12 μm thickness, and the corresponding specific EMI SE is 2142 dB mm−1, which is far superior to previously reported EMI shielding materials. Importantly, the rGO/CA film achieves an excellent tensile strength of 118.0 MPa and a toughness of 4.6 MJ m−3, which is 102% and 130% higher than those of the rGO film. Such significant enhancement is attributed to the synergistic interfacial interactions of hydrogen bonding between CA and rGO nanosheets and ionic bonding between calcium ions and rGO nanosheets. Moreover, the rGO/CA film shows a high EMI shielding reliability (96% EMI SE retention even after 5000 folding cycles). Its features make the rGO/CA film highly attractive for EMI shielding applications, especially in aircraft, aerospace, and next-generation flexible electronics.

Graphical abstract: Integrated strength and toughness in graphene/calcium alginate films for highly efficient electromagnetic interference shielding

Supplementary files

Article information

Article type
Paper
Submitted
27 Jun 2018
Accepted
31 Jul 2018
First published
02 Aug 2018

J. Mater. Chem. C, 2018,6, 9166-9174

Integrated strength and toughness in graphene/calcium alginate films for highly efficient electromagnetic interference shielding

L. Jia, W. Sun, C. Zhou, D. Yan, Q. Zhang and Z. Li, J. Mater. Chem. C, 2018, 6, 9166 DOI: 10.1039/C8TC03151G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements