期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 46, 页码 40628-40637出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b12147
关键词
carbon nanotube; cobalt ferrite; electromagnetic property; mechanical property; electromagnetic interference shielding; magnetomechanical actuation
资金
- Samsung Electronics (Suwon, South Korea) as part of activity of New Material Exploration and Development
The introduction of inorganic nanoparticles into carbon nanotube (CNT) papers can provide a versatile route to the fabrication of CNT papers with diverse functionalities, but it may lead to a reduction in their mechanical properties. Here, we describe a simple and effective strategy for the fabrication of mechanically robust magnetic CNT papers for electromagnetic interference (EMI) shielding and magnetomechanical actuation applications. The magnetic CNT papers were produced by vacuum filtration of an aqueous suspension of CNTs, CoFe2O4 nanoparticles, and poly(vinyl alcohol) (PVA). PVA plays a critical role in enhancing the mechanical strength of CNT papers. The magnetic CNT papers containing 73 wt % of CoFe2O4 nanoparticles exhibited high mechanical properties with Young's modulus of 3.2 GPa and tensile strength of 30.0 MPa. This magnetic CNT paper was successfully demonstrated as EMI shielding paper with shielding effectiveness of similar to 30 dB (99.9%) in 0.5-1.0 GHz, and also as a magnetomechanical actuator in an audible frequency range from 200 to 20 000 Hz.
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