Etude des triglycerides derives des acides palmitique et stearique et de leurs melanges par analyse thermique differentielle II - etude des quinze melanges binaires - 1° et 2° parties

Perron, Roger; Petit, J; Meynier, André

doi:10.1016/0009-3084(71)90057-0

Cited by 13 publications

(1 citation statement)

References 9 publications

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“…Moreover, the liquidus line that was obtained from a thermodynamic model based on the Hildebrand equation introducing a non-ideality parameter fitted well to the experimental data when the singularity was included in the calculations, as depicted by the three-segment solid-liquid transition line in the phase diagram. In agreement with previous work carried out by Perron [ 111 , 112 ], the same singularity was observed in the equimolecular composition of PSP/PPS mixtures. Despite the lack of confirmation by diffraction data for either PSP/PPS or LSL/LLS systems, such a complex behavior might be ascribed to the formation of a molecular compound at the 1:1 concentration ratio [ 57 , 64 , 113 ].…”

Section: Phase Behavior In Mixtures Of Fully Saturated Tagssupporting

confidence: 93%

An Insight into the Solid-State Miscibility of Triacylglycerol Crystals

2020

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The crystallization properties of triacylglycerols (TAGs) strongly determine the functional properties of natural lipids. The polymorphic and mixing phase behavior of TAG molecules have long been, and still are, a hot topic of research with special relevance for the cosmetic, pharmaceutical, and food industry. To avoid the difficulties arising from the study of whole real fats, studies at the molecular level on mixtures of a limited number of TAGs has become an indispensable tool to identify the underlying causes of the physical properties in lipid systems. In particular, phase diagrams of binary mixtures of TAGs exhibiting a different degree of heterogeneity (monoacid or mixed fatty acids; molecular symmetry; the presence of cis or trans double bonds) have resulted in a significant breakthrough in our knowledge about structure–interaction–function relationships. The present work aims to provide an overview of the main reports regarding binary and ternary TAG systems, from the early studies to the most recent developments.

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Section: Phase Behavior In Mixtures Of Fully Saturated Tagssupporting

confidence: 93%

An Insight into the Solid-State Miscibility of Triacylglycerol Crystals

2020

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Étude du Polymorphisme et de L'Intersolubilité de Triglycerides Palmito‐Oleiques par Diffraction RX de Poudres et Analyse Calorimétrique Différentielle

Gibon

Durant

1985

Bulletin des Soc Chimique

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The study of the polymorphism and the intersolubility of some palmitic P and oleic 0 triglycerider : PPP, OPP and POO, has been performed using differential scanning calorimetry and powder X-ray diffraction. Binary and ternary phase diagrams have been constructed by differential scanning calorimetry; the different polymorphic forms have been verified by variable temperature X-ray powder diffraction. Each system has been studied by two ways : after melting and quenching, and after tempering a few months at room temperature. The construction of those phase diagrams shows the formation of solid solutions, monotectic interactions ..., according to the nature and the polymorphic form of the triclycerides.

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Effect of Sorbitan Tristearate on the Thermal and Structural Properties of Monoacid Triglycerides ‐ Influence of a “Cis” or “Trans” Double Bond

Elisabettini

Desmedt²,

Gibon³

et al. 1995

Fett/Lipid

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Paola E l i s a b e t t i n i , A m C l i a D e s m e d t , Veronique G i b o n a n d f ; : D u r a n t *The influence of sorbitan tristearate (STS) on the thermal and structural properties of monoacid triglycerides, tristearin (SSS), trielaidin (EEE) and triolein (000). has been studied by differential scanning calorimetry and powder X-ray diffraction at variable temperature. Results coming from the polymorphic study show that, following a dynamic process, the effect of 5 96 in weight of STS on the crystalline transitions depends o n the thermal behaviour of the triglycerides, and more precisely on the ( I + p' transformation way, i.e. solid state or melt-mediated. The intersolubility between the triglycerides and STS has been determined from "temperature versw composition" binary phase diagrams. In each case, the interaction is of eutectic type. STS is partially miscible into the considered triglyceridic lattices; a maximal solubility is reached into SSS, whereas 000 incorporates only small amounts of the emulsifier. . I n t r o d u c t i o nCocoa butter is an essential material for the manufacture of chocolate products. Its supply largely depends on climatic conditions and is thus not constant; in consequence, the prices fluctuate. Therefore, industrials make use of replacement or substitution fats which are available at any time. Cocoa butter can be partially (CBR) or totally (CBS) replaced by other previously treated natural fats or oils'.'. Incompatibility between the different triglyceridic constituents gives rise to the formation of the so-called fat bloom phenomenon3 which is characterized by white crystals on the surface. This physical alteration can also result from a bad tempering during manufacture and/or thermal variations during ageing of the finished products4"The use of emulsifiers to palliate the fat bloom phenomenon seems to be a good solution. Okada6 and Albon7 established that the morphology of saturated triglyceride crystals is influenced by the presence of impurities; these decrease the growth rate of the crystals coming from the melt. Low amounts of solid emulsifiers influence the phase transition rate of fatty acids', triglycerides'.'' and natural fats. For cocoa butter, sorbitan esters accelerate the transitions from the I to the V form whereas the V + VI transition is delayed". 5 % in weight of sorbitan monostearate delays the a + fi transformation rate of saturated monoacid triglycerides but the retardation effect depends on the thermal pr~cess''-'~. From differential scanning calorimetry data, Jucome Guth16 shows that the same emulsifier delays the a +y transition of SOS whereas the evolution towards the more stable forms, pseudo-fi' and fi, is favoured. From the polymorphic evolution of saturated monoacid triglycerides differing by their hydrocarbon chain length, Des- EinfluO von Sorbitan-Ttistearat nut daa thermische und strukturelleVerbalten von einsfurigen Ttiglyceriden -EinfluO der cis-oder trans- DoppelbindungDer EinfluD von Sorbitan-Tristearat (STS) auf das thermische und struk...

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Etude des triglycerides derives des acides palmitique et stearique et de leurs melanges par analyse thermique differentielle II - etude des quinze melanges binaires - 1° et 2° parties

Cited by 13 publications

References 9 publications

An Insight into the Solid-State Miscibility of Triacylglycerol Crystals

An Insight into the Solid-State Miscibility of Triacylglycerol Crystals

Étude du Polymorphisme et de L'Intersolubilité de Triglycerides Palmito‐Oleiques par Diffraction RX de Poudres et Analyse Calorimétrique Différentielle

Effect of Sorbitan Tristearate on the Thermal and Structural Properties of Monoacid Triglycerides ‐ Influence of a “Cis” or “Trans” Double Bond

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