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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.0c03587
|2 doi
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|a (NLM)34000193
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|a DE-627
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|a eng
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|a Hu, Zhong-Ting
|e verfasserin
|4 aut
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|a Ecofriendly Microencapsulated Phase-Change Materials with Hybrid Core Materials for Thermal Energy Storage and Flame Retardancy
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 01.06.2021
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Microencapsulated phase-change material (ME-PCM) employing octadecane as a core material has been practiced for thermal-energy-storage (TES) applications in buildings. However, octadecane as a hydrocarbon-based PCM is flammable. Herein, silica-shelled microcapsules (SiO2-MCs) and poly(urea-formaldehyde)-shelled microcapsules (PUF-MCs) were successfully prepared, loaded with octadecane/tributyl phosphate (TBP) as hybrid core materials, which not only exhibited good TES properties but also high-effective flame retardancy. SiO2-MC (ΔHm = 124.6 J g-1 and ΔHc = 124.1 J g-1) showed weaker TES capacity than PUF-MC (ΔHm = 186.8 J g-1, ΔHc = 188.5 J g-1) but better flame retardancy with a lower peak heat-release rate (HRRpeak) of 460.9 W g-1 (556.9 W g-1 for PUF-MCs). As compared with octadecane (38.7 kJ g-1), the reduction in total heat release (THR) for SiO2-MC was up to 22% (30.1 kJ g-1) with combustion time shortened by 1/6. SiO2-MC had a typical diameter of 150-210 μm, shell thickness of ∼6.5 μm, and a core fraction of 84 wt %. SiO2-MC showed better thermal stability with a higher initial evaporation/pyrolysis temperature than PUF-MC. The thermal decomposition of MCs with its mechanism of flame retardancy was significantly studied using thermogravimetric analysis/infrared spectrometry (TG-IR). The strategy presented in this study should inspire the development of microcapsules with PCMs/flame retardants as hybrid core materials for structural applications
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|a Journal Article
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|a Reinack, Varghese Hansen
|e verfasserin
|4 aut
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|a An, Jinliang
|e verfasserin
|4 aut
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|a Indraneel, Zope
|e verfasserin
|4 aut
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|a Dasari, Aravind
|e verfasserin
|4 aut
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|a Yang, Jinglei
|e verfasserin
|4 aut
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|a Yang, En-Hua
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 37(2021), 21 vom: 01. Juni, Seite 6380-6387
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:37
|g year:2021
|g number:21
|g day:01
|g month:06
|g pages:6380-6387
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|u http://dx.doi.org/10.1021/acs.langmuir.0c03587
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