With the rapid development of modern communication technology and the popularization of electronic products, the electromagnetic (EM) radiation has become another kind of pollution besides water and air pollution. In order to prevent EM wave pollution, a variety of EM shielding composites were produced. However, the current EM shielding composites lack of favorable flexibility, which fail to meet the requirements of the growing field of flexible and wearable electronic devices. In this study, light-weight and flexible silicon rubber (VMQ)/silver plated hollow glass microspheres (HGMs) composite foams were successfully prepared by the supercritical carbon dioxide (scCO2) foaming process. The composite foam shows an EMI SE of 30.5 dB when the Ag content is 0.51 vol% due to the density difference between solvent and HGMs. Moreover, the reflected EM wave of the composite foam was reduced by 22 % after the introducing of Fe3O4@MWCNTs. The EMI SE of the three-layer composite foam is as high as 59.4 dB, while the R value is only 0.59 at thickness of 2.0 mm. This work provides a new insight for the fabrication of lightweight and flexible EMI shielding composites.

Flexible and microcellular silicone rubber based electromagnetic interference shielding composite foams with gradient structure

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.