Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 450, Issue -, Pages 46-51Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2014.03.005
Keywords
Heat storage; Phase change materials; Nanocapsule; Magnetic nanoparticles; Polyurea; Paraffin; Thermal conductivity
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Funding
- Engineering Research Center of Excellence Program of Ministry of Science, ICT & Future Planning (MSIP)/National Research Foundation of Korea (NRF) [R11-2007-050-03002-0]
- Ministry of Trade Industry and Energy/Korea Evaluation Institute of Industrial Technology (KEIT) [10043265]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10043265] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2007-0056091] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We change material (PCM) nanocapsules (Mag-PCM) based on a paraffin core and polyurea shell (paraffin@polyurea). The Mag-PCM nanocapsules were synthesized via interfacial polycondensation between tolylene diisocyanate (TDI) and ethylene diamine (EDA) with various concentrations (0, 2.2, 3.7, and 4.6 wt%) of Fe3O4 nanoparticles. FTIR and TGA analyses confirmed the successful preparation of MagPCM nanocapsules. TEM and SEM images revealed that most of the Fe3O4 NPs were localized in the polyurea shell layer due to the Pickering effect. Laser flash (LFA) and DSC analyses demonstrated that the embedment of Fe3O4 NPs could increase the thermal conductivity of PCM nanocapsules and reduce the supercooling of the paraffin between bulk and nano-size confinement conditions. (c) 2014 Elsevier B.V. All rights reserved.
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