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Modelling perfume deposition on fabric during a washing cycle: theoretical approach
Author(s) -
Normand Valéry,
Tang Jane,
Struillou Arnaud
Publication year - 2008
Publication title -
flavour and fragrance journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 70
eISSN - 1099-1026
pISSN - 0882-5734
DOI - 10.1002/ffj.1855
Subject(s) - chemistry , pulmonary surfactant , micelle , molecule , critical micelle concentration , deposition (geology) , phase (matter) , fraction (chemistry) , chemical engineering , organic chemistry , chromatography , aqueous solution , paleontology , biochemistry , sediment , engineering , biology
The effect of surfactant micelles on the deposition of perfume molecules on fabric has been estimated theoretically for a full washing cycle, using mass transfer mechanisms. In the absence of a surfactant phase, the fraction of fragrance molecules deposited on fabric is well characterized by a sigmoidal curve with the logP value of the perfume molecules, which is a well‐known result. However, when surfactant is added at a concentration higher than the critical micellar concentration (CMC), high logP value molecules are lost, due to the hydrophobic phase created by the micelles. This phenomenon results in a modified sigmoidal behaviour of the fraction of fragrance molecules deposited, with the logP value that tends to reach the zero deposition for very high logP values. A maximum fraction deposited is located at intermediate logP values (between 1.5 and 3). Evidence of redeposition of high logP value molecules is shown when rinsing is considered. In this case, the micelles break if the overall surfactant concentration is below the CMC, and the trapped perfume molecules are released and are able to deposit on the fabric. This model is successfully subjected to measured performance of the key raw perfume materials. Copyright © 2008 John Wiley & Sons, Ltd.