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ACS Appl Mater Interfaces. 2017 Nov 22;9(46):40628-40637. doi: 10.1021/acsami.7b12147. Epub 2017 Nov 13.

Mechanically Robust Magnetic Carbon Nanotube Papers Prepared with CoFe2O4 Nanoparticles for Electromagnetic Interference Shielding and Magnetomechanical Actuation.

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School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU) , Suwon 16419, Korea.
Samsung Advanced Institute of Technology (SAIT) , Suwon 16678, Korea.
Department of Chemical Engineering, Kwangwoon University , Seoul 01897, Korea.


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 ∼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.


carbon nanotube; cobalt ferrite; electromagnetic interference shielding; electromagnetic property; magnetomechanical actuation; mechanical property


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