Magnetic alignment of SWCNTs decorated with Fe3O4 to enhance mechanical properties of SC-15 epoxy

O. Malkina; H. Mahfuz; K. Sorge; A. Rondinone; J. Chen; K. More; S. Reeves; V. Rangari

doi:10.1063/1.4800698

Magnetic alignment of SWCNTs decorated with Fe₃O₄ to enhance mechanical properties of SC-15 epoxy

O. Malkina, H. Mahfuz, K. Sorge, A. Rondinone, J. Chen, K. More, S. Reeves, V. Rangari

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

We report significant improvement in mechanical properties of SC-15 epoxy when reinforced with decorated nanotubes and cured in a modest magnetic field. The chemical synthesis and field curing process is a low cost and relatively easy technique to impose strong magnetic anisotropy into the system without the need of a superconducting magnet. SWCNT(COOH)s were decorated with Fe ₃O₄ nanoparticles through a sonochemical oxidation process and then dispersed into SC-15 epoxy at 0.5 wt% loading. The admixture was cured for 6 hours in a magnetic field of 10 kOe followed by an additional 24 hours of post curing at room temperature. Control samples were prepared in a similar manner but without the application of the magnetic field. Mechanical tests performed on field-cured samples indicated that tensile strength and modulus increased by 62% and 40%. Most importantly, modulus of toughness, fracture strain, and modulus of resilience improved by 346%, 165%% and 170%, respectively. Such enhancement in mechanical properties was attributed to changes in polymer morphology, partial alignment of nanotubes in the field direction, and sliding at the polymer-nanotube interface. Detailed characterization of the system with XRD, TEM, DMA, and Magnetometry are described in the paper.

Original language	English
Article number	042104
Journal	AIP Advances
Volume	3
Issue number	4
DOIs	https://doi.org/10.1063/1.4800698
State	Published - Apr 2013

Funding

This work was partially supported by National Science Foundation (grant HRD 976871). Portions of this research were conducted at the Center for Nanophase Materials Sciences and the SHaRE User Facility, which are sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy. The authors would also like to thank Dr. Mahmoud Madani at Florida Atlantic University for his assistance in performing mechanical test and Dr. Andreas Kyriacou at Florida Atlantic University for the assistance in XRD test.

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title = "Magnetic alignment of SWCNTs decorated with Fe3O4 to enhance mechanical properties of SC-15 epoxy",

abstract = "We report significant improvement in mechanical properties of SC-15 epoxy when reinforced with decorated nanotubes and cured in a modest magnetic field. The chemical synthesis and field curing process is a low cost and relatively easy technique to impose strong magnetic anisotropy into the system without the need of a superconducting magnet. SWCNT(COOH)s were decorated with Fe 3O4 nanoparticles through a sonochemical oxidation process and then dispersed into SC-15 epoxy at 0.5 wt% loading. The admixture was cured for 6 hours in a magnetic field of 10 kOe followed by an additional 24 hours of post curing at room temperature. Control samples were prepared in a similar manner but without the application of the magnetic field. Mechanical tests performed on field-cured samples indicated that tensile strength and modulus increased by 62% and 40%. Most importantly, modulus of toughness, fracture strain, and modulus of resilience improved by 346%, 165%% and 170%, respectively. Such enhancement in mechanical properties was attributed to changes in polymer morphology, partial alignment of nanotubes in the field direction, and sliding at the polymer-nanotube interface. Detailed characterization of the system with XRD, TEM, DMA, and Magnetometry are described in the paper.",

author = "O. Malkina and H. Mahfuz and K. Sorge and A. Rondinone and J. Chen and K. More and S. Reeves and V. Rangari",

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AU - Mahfuz, H.

AU - Sorge, K.

AU - Rondinone, A.

AU - Chen, J.

AU - More, K.

AU - Reeves, S.

AU - Rangari, V.

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N2 - We report significant improvement in mechanical properties of SC-15 epoxy when reinforced with decorated nanotubes and cured in a modest magnetic field. The chemical synthesis and field curing process is a low cost and relatively easy technique to impose strong magnetic anisotropy into the system without the need of a superconducting magnet. SWCNT(COOH)s were decorated with Fe 3O4 nanoparticles through a sonochemical oxidation process and then dispersed into SC-15 epoxy at 0.5 wt% loading. The admixture was cured for 6 hours in a magnetic field of 10 kOe followed by an additional 24 hours of post curing at room temperature. Control samples were prepared in a similar manner but without the application of the magnetic field. Mechanical tests performed on field-cured samples indicated that tensile strength and modulus increased by 62% and 40%. Most importantly, modulus of toughness, fracture strain, and modulus of resilience improved by 346%, 165%% and 170%, respectively. Such enhancement in mechanical properties was attributed to changes in polymer morphology, partial alignment of nanotubes in the field direction, and sliding at the polymer-nanotube interface. Detailed characterization of the system with XRD, TEM, DMA, and Magnetometry are described in the paper.

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Magnetic alignment of SWCNTs decorated with Fe₃O₄ to enhance mechanical properties of SC-15 epoxy

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