| dc.description.abstract | The application of virgin coconut oil in the form of nanoemulsion such as developing
biodegradable coating, preservatives or nutraceuticals has evoked the interest of
scientists in several fields. Moreover, the evidence on the potential addition of MCTs
content, especially lauric acid, contributing to the health benefits of virgin coconut oil
indicates that it should be considered to gain more investigation. This thesis aimed to study size distribution, physical and functional activities of virgin
coconut oil in form of nanoemulsion using the ultrasonication method. The average
particle size of nanoemulsion made of tween 20 as surfactant was between 327.600 ±
0.866
C and 367.500 ± 0.400
A nm, and that of the soy lecithin was between 292.400 ±
1.571
D
and 576.666 ± 3.308
A nm. The polydispersity index (PDI) value of all
nanoemulsion samples was less than 0.3. The peroxide and acid value of nanoemulsion
samples increased over time. In the fatty acid profile analysis, lauric acid occupied the
major amount of fat in nanoemulsion (7.81 g/100g). According to stability test of
nanoemulsion conducting at constant room temperature, soy lecithin surfactant was
considered the to be better in stabilize sample with most of the application ratio. The
antioxidant capacity of the nanoemulsion reduced over storage time which may be due
to several intrinsic and extrinsic factors such as oxidation of oil, the cracking of layer in
emulsion, etc. Specifically, the relation between antioxidant capacity, oxidative stability, and stability of nanoemulsion still remains a huge questionnaire from previous research, which requires further confirmation and validation. | en_US |
