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- Title
Preparation and properties of Na<sub>2</sub>HPO<sub>4</sub>·12H<sub>2</sub>O-expanded pertile shape stable phase change material for building field.
- Authors
Lv, Geyun; Fu, Wanwan; Zhou, Wei; Lao, Jiayue; Chen, Liuwei; Liu, Jiesheng; Peng, Hao; Zhou, Chengyu
- Abstract
In this study, inorganic hydrated salt Na2HPO4·12H2O with a high enthalpy value and Na2SiO3·9H2O were respectively selected as phase change material (PCM) and nucleating agent to obtain a modified PCM (modified-PCM). Then, by introducing the modified-PCM into expanded perlite (EP), a shape stable phase change material (DHPD-EP SSPCM) was prepared. Combined with the results of the leakage test and DSC, it was determined that the best adsorption rate of EP for the modified-PCM was 58wt %. SEM and N2 adsorption–desorption experiments showed that modified-PCM was adsorbed in the surfaces and pores of EP. FT-IR, and XRD verified that the adsorption of EP for the modified-PCM was physical. The thermal performances of DHPD-EP SSPCM were also explored. Its enthalpy value, phase transition temperature, supercooling degree and thermal conductivity coefficient were 181.51 kJ/kg, 33.6 ℃, 5.8 ℃ and 0.121 W/ (m·K), respectively. The heating–cooling experiment has confirmed the good thermal reliability of SSPCM, which has laid a foundation for the application of SSPCM in building enclosures in the future.
- Subjects
PHASE change materials; PHASE transitions; THERMAL conductivity; BUILDING envelopes; NUCLEATING agents; TRANSITION temperature
- Publication
Journal of Polymer Research, 2023, Vol 30, Issue 8, p1
- ISSN
1022-9760
- Publication type
Article
- DOI
10.1007/s10965-023-03701-x