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Microencapsulation of Stearic Acid into Strontium Titanate Shell by Sol‐Gel Approach for Thermal Energy Storage
Author(s) -
Subramanian Arunachalam,
Appukuttan Sreekumar
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901505
Subject(s) - stearic acid , strontium , thermal stability , materials science , strontium titanate , chemical engineering , thermal energy storage , energy storage , phase change material , thermal , chemistry , composite material , nanotechnology , organic chemistry , thin film , ecology , physics , meteorology , engineering , biology , power (physics) , quantum mechanics
Microencapsulation of phase change material (PCM), stearic acid (SA) into strontium titanate (SrTiO3) shell was generated by means of sol‐gel approach using strontium nitrate and titanium tetraisopropoxide as precursors. The influence of core‐to‐shell ratio (stearic acid‐to‐strontium nitrate) was investigated on encapsulation ratio, stability and encapsulation efficiency in detail. It turned out that a maximum encapsulation efficiency of 41% and encapsulation ratio of 39% were resulted for the (1:2) ratio microencapsulated PCM. The TGA data confirmed that the fabricated MEPCMs degraded in two steps with less weight loss (78%) compared to pristine SA (99.76%). The cycling stability test recorded after 500 melting/solidification cycles revealed that the developed microcapsules retained excellent thermal stability. Detailed preparation of MEPCM and its analytical as well as thermal characterizations are presented.