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Preparation and characterization of methyl palmitate/palygorskite composite phase change material for thermal energy storage in buildings
Highlights Different PAL materials and methyl palmitate (MPA) were used to prepare the composite MPA/PAL. Acid treatment can remove the impurities inside the crystal bundles and then form a highly porous structure. The values of freezing latent heat for MPA/Raw PAL, MPA/H+-PAL and MPA/OPAL were 51.31 J/g, 96.10 J/g and 81.96 J/g. The H+-PAL/MPA composite has good thermal reliability after 300 times thermal cycling test.
Abstract In this study, palygorskites (PALs) including raw PAL, acid-activated PAL and organic PAL were using as carrier to prepare methyl palmitate (MPA)/PAL composite phase change materials (PCM) by vacuum impregnation method (VIM) and direct impregnation method (DIM), respectively. The microstructure, thermal property and thermal stability of MPA/PAL composite were investigated. Scanning electron microscopy and N2 adsorption-desorption measurement results of PAL indicated that acid treatment can remove the impurities inside the crystal bundles and then form a highly porous structure. The MPA was well incorporated into the holes and surface of PAL. The MPA/PAL composite prepared by VIM exhibited higher absorption ratio (46.32%) than that of DIM. The values of freezing latent heat for MPA/Raw PAL, MPA/H+-PAL and MPA/OPAL (prepared via VIM) were 51.31 J/g, 96.10 J/g and 81.96 J/g, respectively. The phase-change temperature of MPA/PAL composites was range from 22.29 °C to 24.5 °C. Moreover, the H+-PAL/MPA composite had good thermal reliability after 300 times thermal cycling test. Therefore, the MPA/PAL composite was an effective building material for reducing energy consumption.
Preparation and characterization of methyl palmitate/palygorskite composite phase change material for thermal energy storage in buildings
Highlights Different PAL materials and methyl palmitate (MPA) were used to prepare the composite MPA/PAL. Acid treatment can remove the impurities inside the crystal bundles and then form a highly porous structure. The values of freezing latent heat for MPA/Raw PAL, MPA/H+-PAL and MPA/OPAL were 51.31 J/g, 96.10 J/g and 81.96 J/g. The H+-PAL/MPA composite has good thermal reliability after 300 times thermal cycling test.
Abstract In this study, palygorskites (PALs) including raw PAL, acid-activated PAL and organic PAL were using as carrier to prepare methyl palmitate (MPA)/PAL composite phase change materials (PCM) by vacuum impregnation method (VIM) and direct impregnation method (DIM), respectively. The microstructure, thermal property and thermal stability of MPA/PAL composite were investigated. Scanning electron microscopy and N2 adsorption-desorption measurement results of PAL indicated that acid treatment can remove the impurities inside the crystal bundles and then form a highly porous structure. The MPA was well incorporated into the holes and surface of PAL. The MPA/PAL composite prepared by VIM exhibited higher absorption ratio (46.32%) than that of DIM. The values of freezing latent heat for MPA/Raw PAL, MPA/H+-PAL and MPA/OPAL (prepared via VIM) were 51.31 J/g, 96.10 J/g and 81.96 J/g, respectively. The phase-change temperature of MPA/PAL composites was range from 22.29 °C to 24.5 °C. Moreover, the H+-PAL/MPA composite had good thermal reliability after 300 times thermal cycling test. Therefore, the MPA/PAL composite was an effective building material for reducing energy consumption.
Preparation and characterization of methyl palmitate/palygorskite composite phase change material for thermal energy storage in buildings
Zhang, Hairong (author) / Zhang, Liquan (author) / Li, Qinglin (author) / Huang, Chao (author) / Guo, Haijun (author) / Xiong, Lian (author) / Chen, Xinde (author)
Construction and Building Materials ; 226 ; 212-219
2019-07-17
8 pages
Article (Journal)
Electronic Resource
English
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