DATEM are ionic oil-in-water emulsifiers. During the reaction of mono- and diglycerides with diacetylated tartaric acid anhydride, the free hydroxyl groups of the mono- and diglycerides, which are responsible for their hydrophilic properties, are esterified. At the same time, a huge hydrophilic and polar moiety with a free carboxylic group is transferred into the molecule via the esterified diacetylated tartaric acid. Due to the partial esterification of hydroxyl groups of the mono- and diglycerides with diacetylated tartaric acid anhydride, free hydroxyl groups, together with the diacetylated tartaric acid moiety, form the hydrophilic part into the DATEM molecules. DATEM are more hydrophilic compared to the mono- and diglycerides that they are made of. The hydrophilic part within these molecules is therefore bigger and hence they show a higher HLB value.The strong reduction of the surface tension into the soybean oil/water system, even in very low concentrations, reflects these facts [8].
đang được dịch, vui lòng đợi..