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New Polyurethane/Docosane Microcapsules as Phase-Change Materials for Thermal Energy Storage

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Figure

Figure 1. SEM images of the silicone-loaded PU capsules. Sample compositions (silicone oil/PEG1000/MDI): a), b) 10/20/20; c), d) 10/10/10; e), f) 10/5/5; g), h) 15/15/15 and i), j) 10/15/15
Figure 4. SEM images of microencapsulated n-docosane in polyurethane shell a), b) without washing treatment: c), d) 30 % ethanol washing, e), f) 30 % ethanol plus distilled water washing and g), h) distilled water washing
Figure 6. a) Thermogravimetric analysis (TGA), b) Derivative weight (%/°C) and c) Heat flow (µV)  of the pure n-docosane, PEG1000 (shell component), PUshell (PEG1000+MDI) and docosane-loaded polyurethane capsules
Figure 7. shell during 10 cycles of heating and cooling; 1rst, 4th and 10th cycle are shown

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