Crystal structures and morphologies of fractionated milk fat in nanoemulsions

Truong, Tuyen, Morgan, Garry P., Bansal, Nidhi, Palmer, Martin and Bhandari, Bhesh (2015) Crystal structures and morphologies of fractionated milk fat in nanoemulsions. Food Chemistry, 171 157-167. doi:10.1016/j.foodchem.2014.08.113

Author Truong, Tuyen
Morgan, Garry P.
Bansal, Nidhi
Palmer, Martin
Bhandari, Bhesh
Title Crystal structures and morphologies of fractionated milk fat in nanoemulsions
Journal name Food Chemistry   Check publisher's open access policy
ISSN 1873-7072
Publication date 2015-03-15
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.foodchem.2014.08.113
Volume 171
Start page 157
End page 167
Total pages 11
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2015
Language eng
Formatted abstract
The triacylglycerol (TAG) crystal structures and morphologies of fractionated milk lipids in nanoemulsions were investigated at 4 °C. Droplet size (0.17 versus 1.20 μm), lipid composition (stearin versus olein) and cooling rate (1 versus 10 °C min−1) had an influence on the structural properties. Five crystal polymorphs (α, β′1, β′2, β1, and β2) were formed with either triple and/or double chain length structures in the solid phases of the emulsified systems. X-ray scattering peak intensities were reduced with the nanoemulsion particles. The internal structure of TAG exhibited stacking of individual lamellar layers (3.8–4.2 nm). Various anisometric shapes of fat nanoparticles were formed due to a highly sharp curvature of the nano-size droplets. The shape of olein nanoparticles was more polyhedral compared to the stearin. TAG crystals arranged in a planar-layered organisation at the slower cooling rate. These differences imply that the nanometric confinement of oil droplets modifies the fat crystal habit.
Keyword Cryo-TEM
Milk fat
Particle size
X-ray scattering
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 6 Sep 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
Centre for Microscopy and Microanalysis Publications
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