18 April 2016 Anisotropic thermal property of magnetically oriented carbon nanotube polymer composites
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Abstract
This paper proposes a method for preparing multi-walled carbon nanotubea/polydimethylsiloxane (MWCNTs/PDMS) composites with enhanced thermal properties by using a high magnetic field (up to 10T). The MWCNT are oriented magnetically inside a silicone by in-situ polymerization method. The anisotropic structure would be expected to produce directional thermal conductivity. This study will provide a new approach to the development of anisotropic thermal-conductive polymer composites.

Systematic studies with the preparation of silicone/graphene composites corresponding to their thermal and mechanical properties are carried out under various conditions: intensity of magnetic field, time, temperature, fillings. The effect of MWCNT/graphene content and preparation procedures on thermal conductivity of composites is investigated. Dynamic mechanical analysis (DMA) is used to reveal the mechanical properties of the composites in terms of the filling contents and magnetic field strength. The scanning electron microscope (SEM) is used to observe the micro-structure of the MWCNT composites. The alignment of MWCNTs in PDMS matrix is also studied by Raman spectroscopy. The thermal conductivity measurements show that the magnetically aligned CNT-composites feature high anisotropy in thermal conductivity.
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Bin Li, Bin Li, Shuai Dong, Shuai Dong, Caiping Wang, Caiping Wang, Xiaojie Wang, Xiaojie Wang, Jun Fang, Jun Fang, "Anisotropic thermal property of magnetically oriented carbon nanotube polymer composites", Proc. SPIE 9800, Behavior and Mechanics of Multifunctional Materials and Composites 2016, 98000A (18 April 2016); doi: 10.1117/12.2217712; https://doi.org/10.1117/12.2217712
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