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Received December 29, 2014
Accepted February 12, 2015
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Preparation of Porous Nanostructures Controlled by Electrospray
Department of Chemical Engineering, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon-si, Kangwon 24341, Korea 1Center for Energy Convergence, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea
Korean Chemical Engineering Research, October 2015, 53(5), 627-631(5), 10.9713/kcer.2015.53.5.627 Epub 12 October 2015
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Abstract
Various solid structures were prepared by electrospray technique. In this process, liquid flows out from a capillary nozzle under a high electrical potential and is subjected to an electric field, which causes elongation of the meniscus to form a jet. In our study, by controlling the amount of polyvinyl pyrrolydone in precursor solution, the jet either disrupted into droplets for the formation of spherical particles or was stretched in the electric field for the formation of fibers. During the electrospray process, the ethanol solvent was evaporated and induced the solidification of precursors, forming solid particles. The evaporation of ethanol solvent also enhanced the mass transport of solutes from the inner core to the solid shell, which facilitated fabrication of porous and hollow structure. The network structures were also prepared by heating the collector.
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Jaworek A, Sobczyk AT, J. Electrostat., 66, 197 (2008)
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Jeong J, Song M, Chung H, Na I, Lee J, Lee H, Park K, Korean Chem. Eng. Res., 52(5), 558 (2014)
Balachandran W, Machowski W, Ahmad CN, IEEE Trans. Ind. Appl., 30, 850 (1994)
Yun KM, Suryamas AB, Hirakawa C, Iskandar F, Okuyama K, Langmuir, 25(18), 11038 (2009)
Choi KI, Lee W, Beak SW, Song J, Lee S, Lim C, Korean Chem. Eng. Res., 52(5), 667 (2014)
Moerman R, Frank J, Marijnissen JCM, Schalkhammer TGM, van Dedem GWK, Anal. Chem., 73, 2183 (2001)
Wu YQ, MacKay JA, McDaniel JR, Chilkoti A, Clark RL, Biomacromolecules, 10(1), 19 (2009)
Almeria B, Gomez A, J. Colloid Interface Sci., 417, 121 (2014)
Wu YQ, Clark RL, J. Colloid Interface Sci., 310(2), 529 (2007)
Bognitzki M, Czado W, Frese T, Schaper A, Hellwig M, Steinhart M, Greiner A, Wendorff JH, Adv. Mater., 13(1), 70 (2001)
