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Synthesis of lactose lauryl ester in organic solvents using aluminosilicate zeolite as a catalyst.

Synthesis of lactose lauryl ester in organic solvents using aluminosilicate zeolite as a catalyst.

Authors :
Enayati, Mojtaba
Gong, Yijing
Abbaspourrad, Alireza
Source :
Food Chemistry. May2019, Vol. 279, p401-407. 7p.
Publication Year :
2019

Abstract

Graphical abstract Lactose fatty acid ester was synthesized using commercially available aluminosilicate zeolite as Lewis acid catalyst in different organic solvents. Reactions were done at 55 °C using pure or raw lactose with lauric acid to synthesize lactose monolaurate as biosurfactant without using lipase. Highlights • A commercial zeolite was used as a catalyst for esterification of lactose with lauric acid. • Pure and raw lactose derived from whey were used in esterification. • Products were easily purified using a solvent extraction method. • Products showed low surface and interfacial tensions compared to industrial surfactants. Abstract Sugar-based biosurfactants are safer and healthier alternatives to synthetic surfactants especially for use in the food industry. In this work, biosurfactants were synthesized via the esterification of lactose with lauric acid in different organic solvents without using lipase or other enzymes. Commercial aluminosilicate zeolite was used as a catalyst. Conversions of up to 92% were obtained for pure lactose and 38% for raw lactose from whey. Surface-active properties including surface tension, interfacial tension, and contact angle were measured. All samples showed surface tensions lower than sodium dodecyl sulfate, SDS (19.59–36.57 mN/m compared to 38.8 mN/m for SDS) and interfacial tensions comparable with it (9.47–12.18 mN/m compared to 4.77 mN/m for SDS). Results showed that aluminosilicate zeolites can be used for the synthesis of lactose esters, which have potential applications as biosurfactants for the food industry featuring low surface and interfacial tensions. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03088146
Volume :
279
Database :
Academic Search Index
Journal :
Food Chemistry
Publication Type :
Academic Journal
Accession number :
134069959
Full Text :
https://doi.org/10.1016/j.foodchem.2018.12.027