Design of two-layered microcapsules of chia oil by using sunflower PC-enriched lecithin and the LBL technique

IXTAINA, VANESA Y.; COPADO, CLAUDIA; TOMÁS, MABEL C.; JULIO, LUCIANA M.; DIEHL, BERND W.K.

Minneapolis, MN

Congreso; 2018 AOCS Annual Meeting & Expo; 2018

American Oil Chemists' Society

Microencapsulation constitutes a strategic technology to protect and deliver sensitive bioactive lipids as ω-3 PUFAs. One and two-layered chia oil (~64% α-linolenic acid) emulsions were prepared by the layer-by-layer electrostatic deposition technique (600bar,pH3), using sunflower phosphatidylcholine-enriched lecithin, maltodextrin and chitosan as wall material. From these emulsions, the corresponding one and two-layered microcapsules were produced by freeze-drying and stored at HR33%,25±2ºC for 120d. Microcapsules presented aw and moisture contents of ~0.15 and ~0.09%, respectively. The microencapsulation efficiency was 85.8 and 89.3% for one and two-layered systems. Loading and loading-efficiency for oil and ω-3 resulted 19.23,15.9,11.97 and 10.74 for mono and 19.08,16.9,11.88 and 10.57 for bilayer powders. A remarkable difference was detected between the induction time and the remaining of ω-3 PUFAs after 50d of mono (12.6h,8.9%) and bilayer (22h,82.1%) systems. Thus, two-layer microcapsules with sunflower phosphatidylcholine-enriched lecithin proved to be efficient delivery systems of ω-3 PUFAs from chia oil with potential application in the food industry