Phase behavior of binary mixture systems of saturated-unsaturated mixed-acid triacylglycerols: effects of glycerol structures and chain-chain interactions

The Journal of Physical Chemistry. B
Laura Bayés-GarcíaKiyotaka Sato

Abstract

We systematically examined the phase behavior of binary mixtures of mixed-acid triacylglycerols (TAGs) containing palmitic and oleic acid moieties 1,3-dioleoyl-2-palmitoyl-glycerol (OPO), 1,2-dipalmitoyl-3-oleoyl-rac-glycerol (PPO), and 1,2-dioleoyl-3-palmitoyl-rac-glycerol (OOP), which are widely present in natural fats and are employed in the food, pharmaceutical, and cosmetic industries. Differential scanning calorimetry and X-ray diffraction methods were applied to observe the mixing behavior of PPO/OPO, OOP/OPO, and PPO/OOP under metastable and stable conditions. The results led to three conclusions: (1) Eutectic behavior was observed in PPO/OPO. (2) Molecular compound (MC) crystals were formed in the mixtures of OOP/OPO and PPO/OOP. (3) However, the MC crystals occurred only under metastable conditions and tended to separate into component TAGs to form eutectic mixture systems after 17 months of incubation. These results were contrary to those of previous studies on 1,3-dipalmitoyl-2-oleoyl glycerol (POP)/OPO and POP/PPO in which the MC crystals were thermodynamically stable. We determined that specific molecular interactions may cause this different phase behavior (stability of POP/OPO and POP/PPO MC crystals and metasta...Continue Reading

References

Nov 17, 2006·Acta Crystallographica. Section B, Structural Science·Jan B van MechelenHenk Schenk
May 22, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Robert W CorkeryCharles B Hanna
Sep 24, 2008·Chemistry and Physics of Lipids·Marc V BoodhooSuresh S Narine
Jun 25, 2013·Chemical Reviews·R John Craven, Robert W Lencki

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Citations

May 16, 2018·Journal of Oleo Science·Lu ZhangKiyotaka Sato
Dec 14, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·C Leigh BroadhurstMoon S Kim
Oct 11, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Jorge Macridachis-GonzálezAnd Teresa Calvet
Nov 15, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Kengoh Nakanishi, Satoru Ueno
Oct 24, 2018·The Journal of Physical Chemistry. B·Marjorie Ladd ParadaMichael Rappolt
Oct 24, 2018·The Journal of Physical Chemistry. B·Amin SadeghpourMichael Rappolt

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