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PEG encapsulated by porous triamide-linked polymers as support for solid-liquid phase change materials for energy storage.
- Source :
-
Chemical Physics Letters . Mar2017, Vol. 671, p165-173. 9p. - Publication Year :
- 2017
-
Abstract
- A series of porous triamide-linked polymers labeled as PTP were prepared by condensation of 1,3,5-benzenetricarbonyl trichloride with benzene-1,4-diamine (A), 4,4′-methylenediamine (B) and 1,3,5-triazine-2,4,6-triamine (C) respectively. The as-synthesized polymers exhibit permanent porosity and high surface areas which guarantee to hold polyethylene glycol (PEG) molecules in their network for shape-stabilized phase change materials. They possess different effects on the phase change properties of the composite due to their different porosities. PTP-A have intrinsic well-ordered morphology, microstructure and good enough pores to keep the PCMs compared to PTP-B and PTP-C. PEG 2000 used as PCMs could be retained up to 85 wt% in PTP-A polymer materials and these composites were defined as form-stable composite PCMs without the leakage of melted PCM. The thermal study revealed a good storage effect of encapsulated polymer and the enthalpy of melting increases in the order PTP-C < PTP-B < PTP-A at the same PEG content in the blends. The PEG@PTP-A composite at 85% PEG content presented a greater thermal storage capacity. The latent heats for melting and freezing was found to be 155 and 141.7 kJ/kg with a peak appearing at around 53.13 and 29.67 °C respectively. The study suggests that pore size is important for the preparation of shape-stabilized PCMs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00092614
- Volume :
- 671
- Database :
- Academic Search Index
- Journal :
- Chemical Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 121220739
- Full Text :
- https://doi.org/10.1016/j.cplett.2017.01.028