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Materials (Basel)

Title:		Porous Coatings to Control Release Rates of Essential Oils to Generate an Atmosphere with Botanical Actives
Author(s):		Hettmann K; Monnard FW; Melo Rodriguez G; Hilty FM; Yildirim S; Schoelkopf J;
Address:		"Omya International AG, Baslerstrasse, 4665 Oftringen, Switzerland. Life Sciences and Facility Management, Zurich University of Applied Sciences, Campus Reidbach, 8820 Waedenswil, Switzerland"
Journal Title:		Materials (Basel)
Year:		2022
Volume:		20220315
Issue:		6
Page Number:		-
DOI:		10.3390/ma15062155
ISSN/ISBN:		1996-1944 (Print) 1996-1944 (Electronic) 1996-1944 (Linking)
Abstract:		"Essential oils have been used in diverse areas such as packaging, agriculture and cosmetics, for their antimicrobial and pesticide activity. The organic volatile compounds of the essential oils are involved in its activity. Controlling their release helps to prolong their functionality. In this study, a functionalized calcium carbonate porous coating was employed to control the release of thyme and rosemary oil in a confined space. The release rate was evaluated at 7 degrees C and 23 degrees C, gravimetrically. It was shown that the capillary effect of the porous coating slowed down the release of the volatiles into the headspace compared to the bulk essential oil. A linear drive force model was used to fit the obtained data from both essential oils. The model showed that rosemary reached the asymptotic mass loss equilibrium faster than thyme. This result can be explained by the diverse composition and concentration of monoterpenoids between the two essential oils. Temperature and degree of loading also played important roles in the desorption of the essential oils. It was observed that at high degrees of loading and temperatures the desorption of essential oils was higher. The above-described technology could be used for applications related to food preservation, pest control among others"
Keywords:		antimicrobial evaporation layers linear driving force packaging;
Notes:		"PubMed-not-MEDLINEHettmann, Kai Monnard, Fabien W Melo Rodriguez, Gabriela Hilty, Florentine M Yildirim, Selcuk Schoelkopf, Joachim eng 25176.1 PFLS-LS/Commission for Technology and Innovation/ Switzerland 2022/03/26 Materials (Basel). 2022 Mar 15; 15(6):2155. doi: 10.3390/ma15062155"