title: Citral degradation in micellar structures formed with polyoxyethylene-type surfactants.
abstract: In a micellar solution, the chemical degradation of poorly water-soluble food flavours can be influenced by the properties of the surfactants forming the micelles in aqueous solutions. To evaluate how hydrophilic head size and hydrophobic tail length influence the chemical degradation rate of food flavour, micelles were prepared with Brij surfactants (Brij 35, 58, 78 and 700), each of which had very similar molecular structures (polyoxyethylene fatty acid ether). The chemical degradation of citral in Brij micelles was found to be highest in an acidic environment. There was no significant difference in the chemical degradation rate of citral in Brij micelles in non-acidic conditions, regardless of the hydrophilic head size or hydrophobic tail length. Brij surfactants with larger hydrophilic heads effectively retarded the chemical degradation of citral in an acidic environment. Our findings suggest that the length of the hydrophobic tail rarely influenced the micelle's ability to chemically stabilize citral.
authors.affiliation: Department of Food Science and Technology, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea.
authors.forename: Sung Joon
authors.initials: SJ
authors.lastname: Park
authors.affiliation: Department of Food Science and Technology, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea.
authors.forename: Chi Rac
authors.initials: CR
authors.lastname: Hong
authors.affiliation: Department of Food Science and Technology, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea; Department of Interdisciplinary Bio IT Materials, Seoul National University of Science and Technology, Seoul 139-743, Republic of Korea. Electronic address: choisj@seoultech.ac.kr.
authors.forename: Seung Jun
authors.initials: SJ
authors.lastname: Choi
mesh_terms: D000080462:Acyclic Monoterpenes; D057927:Hydrophobic and Hydrophilic Interactions; D015394:Molecular Structure; D039821:Monoterpenes / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D000080462:Acyclic Monoterpenes; D039821:Monoterpenes; D013501:Surface-Active Agents; D011092:Polyethylene Glycols; C007076:citral
keywords: Chemical degradation; Citral; Flavour; Micelles; Polyoxyethylene alkyl ethers