Plant wax crystals display platelet-like morphology
•Cryogenic scanning electron microscopy was used to image wax oleogels.•Crystal morphology of waxes was previously reported as needle-like.•We report that all three wax types have a platelet morphology.•Surface area, roughness, and chemistry will influence oil binding capacity.
Cryogenic scanning electron microscopy was used to image de-oiled 2% rice bran wax, sunflower wax, and candelilla wax oleogels. Contrary to previous reports on the morphology of plant-based waxes, all three species appear as platelets. These findings contest previous theories about the dependency of oil gelation on a needle-like morphology and development of an entangled network, and suggest that surface effects such as surface area and surface roughness may contribute to oil binding capacity.
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Journal: Food Structure - Volume 3, January 2015, Pages 30–34