1-Octadecanol@hierarchical porous polymer composite as a novel shape-stability phase change material for latent heat thermal energy storage

Jia Tang, Mu Yang, Fang Yu, Xingyu Chen, Li Tan and Ge Wang

Applied Energy, 2017, vol. 187, issue C, 514-522

Abstract: A hierarchical porous polymer (HPP), which was prepared by the imine condensation between pararosaniline base and 1,4-phthalaldehyde, has been used as the supporting material for novel shape-stability phase change materials (ssPCMs). With high porosity (91.9%), the hierarchical pores in the HPP supply sufficient space to adsorb 1-octadecanol, which is restricted in pores by the weak interactions such as hydrogen bonding, surface tension and capillary force in the interfacial region. The HPP exhibits high adsorption of 1-octadecanol (75wt%) in the ssPCMs, the relative enthalpy of which is up to 169.2J/g. The solid 13C NMR spectra and XRD results show that the hydrogen bonding interaction between 1-octadecanol and the HPP in the interfacial region increases the rotational and translational disorder of the 1-octadecanol, and induces the stability of the β phase, effectively reducing the extent of the supercooling of the 1-octadecanol (up to 37%). With its pressure-dependent elastic deformation behavior, the HPP can be adaptable along well with the phase transition of 1-octadecanol, which is of benefit to the crystallinities of 1-octadecanol and the shape stability of the composite PCMs. Thermal cycling and DSC results also confirm the high shape-stability and thermal stability of the ssPCMs.

Keywords: 1-Octadecanol; Hierarchical porous polymer; Shape-stability phase change material; Thermal energy storage (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (15)

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DOI: 10.1016/j.apenergy.2016.11.043

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