Highly stable phase change material emulsions fabricated by interfacial assembly of amphiphilic block copolymers during phase inversion

This study introduced a robust and promising approach to fabricate highly stable phase change material (PCM) emulsions consisting of n-tetradecane as a dispersed phase and a mixture of meso-2,3-butanediol (m-BDO) and water as a continuous phase. We showed that amphiphilic poly(ethylene oxide)-b-poly...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 31(2015), 9 vom: 10. März, Seite 2649-54
1. Verfasser: Park, Hanhee (VerfasserIn)
Weitere Verfasser: Han, Dong Wan, Kim, Jin Woong
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Butylene Glycols Emulsions Lactones Membranes, Artificial poly(ethylene oxide)-b-poly(caprolactone) Water 059QF0KO0R Polyethylene Glycols mehr... 3WJQ0SDW1A 2,3-butylene glycol 45427ZB5IJ
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520 |a This study introduced a robust and promising approach to fabricate highly stable phase change material (PCM) emulsions consisting of n-tetradecane as a dispersed phase and a mixture of meso-2,3-butanediol (m-BDO) and water as a continuous phase. We showed that amphiphilic poly(ethylene oxide)-b-poly(ε-caprolactone) block copolymers assembled to form a flexible but tough polymer membrane at the interface during phase inversion from water-in-oil emulsion to oil-in-water emulsion, thus remarkably improving the emulsion stability. Although the incorporation of m-BDO into the emulsion lowered the phase changing enthalpy, it provided a useful means to elevate the melting temperature of the emulsions near to 15 °C. Interestingly, supercooling was commonly observed in our PCM emulsions. We attributed this to the fact that the PCM molecules confined in submicron-scale droplets could not effectively nucleate to grow molecular crystals. Moreover, the presence of m-BDO in the continuous phase rather dominated the heat emission of the emulsion system during freezing, which made the supercooling more favorable 
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650 4 |a Research Support, Non-U.S. Gov't 
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650 7 |a Lactones  |2 NLM 
650 7 |a Membranes, Artificial  |2 NLM 
650 7 |a poly(ethylene oxide)-b-poly(caprolactone)  |2 NLM 
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650 7 |a 2,3-butylene glycol  |2 NLM 
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700 1 |a Han, Dong Wan  |e verfasserin  |4 aut 
700 1 |a Kim, Jin Woong  |e verfasserin  |4 aut 
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