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Received November 5, 2012
Accepted April 1, 2013
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Phase-change core/shell structured nanofibers based on eicosane/poly(vinylidene fluoride) for thermal storage applications
Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Hanoi, Vietnam 1Center of Chemical Technology and Division of Chemical Engineering, Hankyong National University, 167, Chungang-ro, Anseong-si, Gyeonggi-do 456-749, Korea
jspark@hknu.ac.kr
Korean Journal of Chemical Engineering, July 2013, 30(7), 1403-1409(7), 10.1007/s11814-013-0046-3
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Abstract
We fabricated eicosane/poly(vinylidene fluoride) (PVDF) core/shell nanofibers by melt coaxial electrospinning as potential heat-storage applications. Eicosane, a hydrocarbon with melting point near the human body temperature and high latent heat, was chosen as the core material. Melted eicosane and PVDF solutions were coaxially electrospun using a double spinneret, in which melted eicosane was fed at 0.090-0.210 mL/h while the feeding rate of PVDF solution was maintained constant at 1.500 mL/h. The applied voltage and working distance were maintained_x000D_
constant at 12 kV and 17 cm, respectively. Good core/shell structure of nanofibers was observed at core feed rates of 0.090-0.180mL/h by transmission electron microscopy. Differential scanning calorimetry and thermogravimetric analysis values indicated good thermal stability and high energy-storage capacity of the obtained nanofibers. The highest amount of eicosane encapsulated in the electrospun core/shell nanofibers reached 32.5 wt% at core feed rate 0.180 mL/h and had a latent heat of 77 J/g at melting point 39.2 ℃. These shape-stabilized core/shell composite nanofibers showed good thermoregulating properties and had sufficiently high tensile strength for potential energy-storage applications, especially in smart textiles.
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References
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Sanchez L, Sanchez P, Lucas A, Carmona M, Rodriguez JF, Colloid. Polym. Sci., 285(12), 1377 (2007)
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Shin Y, Yoo DI, Son K, J. Appl. Polym. Sci., 96(6), 2005 (2005)
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Chen C, Wang L, Huang Y, Mater. Lett., 62, 3515 (2008)
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Chen CZ, Wang L, Huang Y, Polymer, 48(18), 5202 (2007)
Alay S, Gode F, Alkan C, Fibers and Polymers., 11(8), 1089 (2010)
Nguyen TTT, Lee JG, Park JS, Macromol. Res., 19(4), 370 (2011)
Do CV, Nguyen TTT, Park JS, Sol. Energy Mater. Sol.Cells., 104, 131 (2012)
McCann JT, Marquez M, Xia Y, Nano Lett., 6, 2868 (2006)
Salaun F, Devaux E, Bourbigot S, Rumeau P, Text. Res. J., 80(3), 195 (2010)
Deveci SS, Basal G, Colloid. Polym. Sci., 287(12), 1455 (2009)
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Diaz JE, Barrero A, Marquez M, Loscertales IG, Adv. Funct. Mater., 16(16), 2110 (2006)
Alkan C, Sari A, Karaipekli A, Uzun O, Sol. Energy Mater. Sol. Cells, 93(1), 143 (2009)
