Phase behaviour of model triglyceride ternary blends: triolein, tripalmitin and tristearin,Physical Chemistry Chemical Physics

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Phase behaviour of model triglyceride ternary blends: triolein, tripalmitin and tristearin
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2022-11-16 , DOI: 10.1039/d2cp02395d
Luca Pellegrino ₁ , Gunjan Tyagi ₁ , Eric S J Robles ₂ , João T Cabral ₁

Affiliation

We investigate the phase behavior of model ternary triacylglycerol blends, comprising triolein (C₅₇H₁₀₄O₆, OOO), tripalmitin (C₅₁H₉₈O₆, PPP) and tristearin (C₅₇H₁₁₀O₆, SSS), building upon extensive characterisation of single and binary mixtures, in order to rigorously map the thermal transitions of model natural ‘fats’. A combination of calorimetry, X-ray diffraction, and FTIR spectroscopy is employed to determine crystallisation and melting temperatures and identify the corresponding phases in the complex ternary system. We recover the eutectic behaviour of SSS-PPP blends and the invariability of OOO neat transitions, and resolve the complex β′ + β ternary surface, reflecting the roles of unsaturation and polymorphism of its constituents. Our results provide a representation of the OOO:PPP:SSS:temperature phase behaviour into a triangular prism, consistent with binary pair-wise data, which can inform a range of food science, cosmetic, pharmaceutical and cleaning applications that depend strongly on the physical-chemistry of such multicomponent ‘triglycerides’.

中文翻译：

模型甘油三酯三元混合物的相行为：三油精、三棕榈精和三硬脂精

我们研究了模型三元甘油三酯混合物的相行为，包括三油精 (C ₅₇ H ₁₀₄ O ₆ , OOO)、三棕榈精 (C ₅₁ H ₉₈ O ₆ , PPP) 和三硬脂精 (C ₅₇ H ₁₁₀ O ₆，SSS），建立在对单一和二元混合物的广泛表征的基础上，以便严格绘制模型天然“脂肪”的热转变。采用量热法、X 射线衍射和 FTIR 光谱学的组合来确定结晶和熔化温度，并识别复杂三元系统中的相应相。我们恢复了 SSS-PPP 混合物的共晶行为和 OOO 整齐过渡的不变性，并解决了复杂的 β' + β 三元表面，反映了其成分的不饱和性和多态性的作用。我们的结果将 OOO:PPP:SSS:temperature 相行为表示为三棱柱，与二进制成对数据一致，可以为一系列食品科学、化妆品、

更新日期：2022-11-16

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