Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 43, Pages 49030-49041Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c08868
Keywords
electromagnetic interference shielding; nonwoven fabrics; superhydrophobic; carbon fibers; multifunctional applications
Funding
- National Natural Science Foundation of China [51775197]
- Science and Technology Planning Project of Guangdong Province, China [2018A050506007]
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In the 5G era, for portable electronics to operate at high performance and low power levels, the incorporation of superior electromagnetic interference (EMI) shielding materials within the packages is of critical importance. A desirable wearable EMI shielding material is one that is lightweight, structurally flexible, air-permeable, and able to self-clean. To this end, a bioinspired electroless silver plating strategy and a one-step electrodeposition method are utilized to prepare an EMI shielding fabric (CEF-NF/PDA/Ag/50-30) that possesses these desirable properties. Porous CEF-NF mats with a spatially distributed silver coating create efficient pathways for electron movement and enable a remarkable conductivity of 370 S mm(-1). When tested within a frequency range of 8.2-12.4 GHz, this highly conductive fabric not only achieves an EMI shielding effectiveness (EMI SE of 101.27 dB at 5028 dB cm(2) g(-1)) comparable to a very thin and light metal but also retains the unique properties of fabrics.being light, structurally flexible, and breathable. In addition, it exhibits a high contact angle (CA) of 156.4 degrees with reversible surface wettability. After having been subjected to 1000 cycles of bending, the performance of the fabric only decreases minimally. This strategy potentially provides a novel way to design and manufacture an easily integrated EMI shielding fabric for flexible wearable devices.
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