TY - JOUR
T1 - Magnetically anisotropic additive for scalable manufacturing of polymer nanocomposite
T2 - Iron-Coated carbon nanotubes
AU - Yamamoto, Namiko
AU - Manohara, Harish
AU - Platzman, Ellen
N1 - Funding Information:
This work was supported by the Keck Institute for Space Studies at California Institute of Technology, Department of Aerospace Engineering and Materials Research Institute at the Pennsylvania State University, and the Hartz Family Career Development Professorship in Engineering. A part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. Measurement on theAGMwas done at the USC Department of Earth Sciences in Los Angeles, CA. Yamamoto is thankful to Mr CoreyMBreznak and Dr Paris von Lockette for their generous assistance with theVSMmeasurement.
Publisher Copyright:
© 2016 IOP Publishing Ltd.
PY - 2016/2
Y1 - 2016/2
N2 - Novel nanoparticles additives for polymer nanocomposites were prepared by coating carbon nanotubes (CNTs) with ferromagnetic iron (Fe) layers, so that their micro-structures can be bulkcontrolled by external magnetic field application. Application of magnetic fields is a promising, scalable method to deliver bulk amount of nanocomposites while maintaining organized nanoparticle assembly throughout the uncured polymer matrix. In this work, Fe layers (∼18 nmthick) were deposited on CNTs (∼38 nmdiameter and∼50 μmlength) to form thin films with high aspect ratio, resulting in a dominance of shape anisotropy and thus high coercivity of∼50-100 Oe. The Fe-coated CNTs were suspended in water and applied with a weak magnetic field of∼75 G, and yet preliminary magnetic assembly was confirmed. Our results demonstrate that the fabricated Fe-coated CNTs are magnetically anisotropic and effectively respond to magnetic fields that are∼103 times smaller than other existing work (∼105 G).We anticipate this work will pave the way for effective property enhancement and bulk application of CNT-polymer nanocomposites, through controlled microstructure and scalable manufacturing.
AB - Novel nanoparticles additives for polymer nanocomposites were prepared by coating carbon nanotubes (CNTs) with ferromagnetic iron (Fe) layers, so that their micro-structures can be bulkcontrolled by external magnetic field application. Application of magnetic fields is a promising, scalable method to deliver bulk amount of nanocomposites while maintaining organized nanoparticle assembly throughout the uncured polymer matrix. In this work, Fe layers (∼18 nmthick) were deposited on CNTs (∼38 nmdiameter and∼50 μmlength) to form thin films with high aspect ratio, resulting in a dominance of shape anisotropy and thus high coercivity of∼50-100 Oe. The Fe-coated CNTs were suspended in water and applied with a weak magnetic field of∼75 G, and yet preliminary magnetic assembly was confirmed. Our results demonstrate that the fabricated Fe-coated CNTs are magnetically anisotropic and effectively respond to magnetic fields that are∼103 times smaller than other existing work (∼105 G).We anticipate this work will pave the way for effective property enhancement and bulk application of CNT-polymer nanocomposites, through controlled microstructure and scalable manufacturing.
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U2 - 10.1088/2053-1591/3/2/025004
DO - 10.1088/2053-1591/3/2/025004
M3 - Article
AN - SCOPUS:84959869762
SN - 2053-1591
VL - 3
JO - Materials Research Express
JF - Materials Research Express
IS - 2
M1 - 025004
ER -