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Relationship Between Physicochemical Properties and Moisture Barrier Property of Confectionery Coating Fats
Author(s) -
Cheong LingZhi,
Shen Qi,
Chen Fangfang,
Wu Juan,
Zhang Linshang,
Zhang Hong
Publication year - 2017
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-017-2957-3
Subject(s) - moisture , coating , materials science , sugar , food science , composite material , chemical engineering , chemistry , engineering
Moisture migration in food causes deleterious effects on food quality such as loss of crispiness in ice cream cones, drying of chocolate with liquid centers, sugar bloom and cracking of compound/chocolate coating. The present study aimed to investigate the relationship between physicochemical properties of confectionery coating fats such as fatty acids and triacylglycerol (TAG) composition, solid fat contents, rheological and crystalline properties with their moisture barrier property. Coating fats with high content of trisaturated and desaturated TAG; and high SFC at 25 °C were found to have significant ( P < 0.05) positive correlation with its moisture barrier property. These fats were able to crystallize into highly crystalline materials (high SFC) with small crystal size and dense networks. Thus, these fats were able to significantly delay moisture migration. Nevertheless, some of the highly crystalline fats also had high G ′ value indicating poor mechanical properties and higher tendency of such fats to crack. In order to have good moisture barrier property, coating fats need to have sufficient solids with small crystal size and dense networks; and also low G ′ value. Wafer coated with good moisture barrier fat showed less cracking during storage.