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Title: Microencapsulation of bio-based phase change materials with silica coated inorganic shell for thermal energy storage

Abstract

This study investigates the use of cenospheres to encapsulate a low-cost, bio-based phase change material (PCM) derived from refined edible vegetable oil. Chemical etching was applied on the cenospheres to create holes through which melted PCM was loaded to produce a PCM microcapsule. Subsequently, a silica-based coating was applied to seal the perforations and prevent leakage of PCM from the microcapsule. Microstructural, chemical compatibility, thermal, and leakage properties of the produced silica coated PCM microcapsule (SCPCM) were assessed. No leakage was found for this new microcapsule, and higher thermal stability and conductivity were noted. Thermal decomposition of the PCM in SCPCM was delayed by about 16 degrees C attributable to the silica coating. Additionally, an enhanced compressive strength performance was achieved at 10 vol% of sand replacement with SCPCM. 20-30 vol% replacement of sand with cenosphere microcapsules seems to be the optimal range for reasonable compressive strength. The workability of the mortar incorporated with SCPCM decreased when the replacement level increased to more than 30 vol% due to the hydrophilic nature of the silica deposit. This study has demonstrated the potential of cenospheres as inorganic shell for PCMs and the potential for incorporation of SCPCM into construction materials for thermalmore » energy storage (TES).« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2];  [2]; ORCiD logo [2];  [1]
  1. Univ. of Alabama, Tuscaloosa, AL (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office; National Science Foundation (NSF)
OSTI Identifier:
1959310
Alternate Identifier(s):
OSTI ID: 2242518
Report Number(s):
NREL/JA-5500-85122
Journal ID: ISSN 2352-7102; MainId:85895;UUID:5cee4b5c-093f-45c4-b8b3-c9e321d2b172;MainAdminID:68886
Grant/Contract Number:  
AC36-08GO28308; EE0008677; CMMI-1563551; IIP-2118493; EE-0008677
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Building Engineering
Additional Journal Information:
Journal Volume: 67; Journal ID: ISSN 2352-7102
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; building envelope; cement; concrete; microencapsulated phase change materials; phase change materials; thermal energy storage

Citation Formats

Ismail, Abdulmalik, Zhou, Jingyi, Aday, Anastasia, Davidoff, Isabel, Odukomaiya, Adewale, and Wang, Jialai. Microencapsulation of bio-based phase change materials with silica coated inorganic shell for thermal energy storage. United States: N. p., 2023. Web. doi:10.1016/j.jobe.2023.105981.
Ismail, Abdulmalik, Zhou, Jingyi, Aday, Anastasia, Davidoff, Isabel, Odukomaiya, Adewale, & Wang, Jialai. Microencapsulation of bio-based phase change materials with silica coated inorganic shell for thermal energy storage. United States. https://doi.org/10.1016/j.jobe.2023.105981
Ismail, Abdulmalik, Zhou, Jingyi, Aday, Anastasia, Davidoff, Isabel, Odukomaiya, Adewale, and Wang, Jialai. Sat . "Microencapsulation of bio-based phase change materials with silica coated inorganic shell for thermal energy storage". United States. https://doi.org/10.1016/j.jobe.2023.105981. https://www.osti.gov/servlets/purl/1959310.
@article{osti_1959310,
title = {Microencapsulation of bio-based phase change materials with silica coated inorganic shell for thermal energy storage},
author = {Ismail, Abdulmalik and Zhou, Jingyi and Aday, Anastasia and Davidoff, Isabel and Odukomaiya, Adewale and Wang, Jialai},
abstractNote = {This study investigates the use of cenospheres to encapsulate a low-cost, bio-based phase change material (PCM) derived from refined edible vegetable oil. Chemical etching was applied on the cenospheres to create holes through which melted PCM was loaded to produce a PCM microcapsule. Subsequently, a silica-based coating was applied to seal the perforations and prevent leakage of PCM from the microcapsule. Microstructural, chemical compatibility, thermal, and leakage properties of the produced silica coated PCM microcapsule (SCPCM) were assessed. No leakage was found for this new microcapsule, and higher thermal stability and conductivity were noted. Thermal decomposition of the PCM in SCPCM was delayed by about 16 degrees C attributable to the silica coating. Additionally, an enhanced compressive strength performance was achieved at 10 vol% of sand replacement with SCPCM. 20-30 vol% replacement of sand with cenosphere microcapsules seems to be the optimal range for reasonable compressive strength. The workability of the mortar incorporated with SCPCM decreased when the replacement level increased to more than 30 vol% due to the hydrophilic nature of the silica deposit. This study has demonstrated the potential of cenospheres as inorganic shell for PCMs and the potential for incorporation of SCPCM into construction materials for thermal energy storage (TES).},
doi = {10.1016/j.jobe.2023.105981},
journal = {Journal of Building Engineering},
number = ,
volume = 67,
place = {United States},
year = {Sat Jan 28 00:00:00 EST 2023},
month = {Sat Jan 28 00:00:00 EST 2023}
}

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