La double cristallisation de l'huile de palme Mise en evidence par diffraction des rayons X et analyse calorimetrique differentielle

Deroanne, Claude; Marcoen, Jean Marie; Watelet, Jean-Baptiste; Severin, M.

doi:10.1007/bf02104089

Cited by 9 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As already mentioned in the introduction, the literature refers to four polymorphic forms for palm oil: sub-a, a, b' and b [8,9,11]. Very rapid cooling of the melted oil allows crystallization in the sub-a form, which transforms on heating to the a form, then to the b' form, which in turn modifies into the b form.…”

Section: Palm Oilmentioning

confidence: 97%

“…The composition and thermal profile of crude palm oil and some of its products were also analyzed by Che Man et al [2]. From their heating thermograms recorded at slow cooling rate (-5 7C/min) and according to previous results of Che Man and Swe [10], they came to the same conclusion as Deroanne and coworkers [8]. A thermal analysis of palm stearin using DSC was conducted in 1990 by Busfield and Proschogo [11].…”

Section: Introductionmentioning

confidence: 99%

“…DSC studies on palm oil and on some palm products have been reported in the literature by several workers. Early in the 1970's, Deroanne and coworkers [8] combined powder XRD and DSC to study the crystallization of palm oil and provided interesting data relating to the various polymorphic forms. These authors showed that palm oil exhibits all four of the basic polymorphic forms (sub-a, a, b' and b), although for some time it was thought that the most stable form was b' (and not b).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparative analysis of triacylglycerol composition, melting properties and polymorphic behavior of palm oil and fractions

Danthine

Gibon²

2007

Euro J Lipid Sci & Tech

View full text Add to dashboard Cite

Comparative analysis of triacylglycerol composition, melting properties and polymorphic behavior of palm oil and fractionsPalm oil is without doubt the most widely fractionated oil. Dry fractionation is based on differences in the melting points of triacylglycerols (TAG) which will crystallize selectively during the cooling process. Unfortunately, limitations due to intersolubility, closely linked to polymorphism, induce formation of co-crystals at each crystallization step. For this reason, only restricted TAG enrichments are observed. In this work, a series of samples (24) of palm oil, solid and liquid fractions (stearins, mid fractions, oleins and superoleins) have been selected and examined in terms of TAG composition (by HPLC), differential scanning calorimetry (DSC) melting profile and variable temperature powder X-ray diffraction pattern. Three major endotherms [low-melting, highmelting and very high-melting peaks (LMP, HMP and VHMP)] are detected in the DSC melting profiles (5 7C/min). The VHMP is only recorded for palm stearin which contains more SSS components. The HMP contribution is weak for palm olein and even not observed for palm super oleins. The LMP is usually made up of UUU, SUU and SUS components; SUS components are observed in both LMP and HMP; the HMP is also made up of some SSS, except for palm oleins and super oleins. Sub-a 2 , sub-a 1 , a, b' 2 , b' 1 and b polymorphic forms are recorded; the LMP components preferentially crystallize in sub-a 2 , sub-a 1 and a forms; the HMP components generally crystallize in b' 2 and b' 1 , with a tendency to exhibit b crystals, depending on the SSS content. Components of the VHMP have an increased tendency to stabilize in the b form; in view of the results, we can assume that there is a clear relationship between TAG composition, melting properties and polymorphic behavior and of palm oil and fractions.

show abstract

Section: Palm Oilmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative analysis of triacylglycerol composition, melting properties and polymorphic behavior of palm oil and fractions

Danthine

Gibon²

2007

Euro J Lipid Sci & Tech

View full text Add to dashboard Cite

show abstract

“…The β polymorph is identified by its characteristic peak at 4.6 Å for palm oil based samples, while the peaks at 3.9, 4.2, and 4.3 Å indicate the presence of a β ’ polymorphic form. [ 42–46 ] The β ’ form was dominantly present in the FB‐100 sample, as the peak at 4.6 Å was relatively small compared to the peak at 4.2 Å, which is the characteristic peak of β ’. Furthermore, the amount of β ‐crystals was the lowest in the pure sPMF sample (i.e., FB‐100) compared to the other three FBs, since the peak area of the peak at 4.6 Å was larger for the mixtures of sPMF and HOSO.…”

Section: Resultsmentioning

confidence: 99%

Oil Diffusion in Fat Crystal Matrices: Characterization by NMR Relaxometry and Diffusometry

Nelis

Neve

Danthine

et al. 2021

Euro J Lipid Sci & Tech

View full text Add to dashboard Cite

A novel technique based on high resolution (HR)‐NMR diffusometry is presented to investigate oil diffusion on the (sub)‐micron scale level in fat crystal networks in situ and in a non‐destructive way. The use of a high‐gradient probe enables the observation of the time (Δ)‐dependent diffusion behavior in fat blends (FBs) of different solid fat content (SFC), as obtained by mixing soft palm mid fraction and high‐oleic sunflower oil. Hereby, the NMR‐diffusion data are analyzed using CONTIN to obtain a continuous distribution of diffusion coefficients. As such, the hindrance of the oil diffusion by the fat crystal network is examined. The characterization of the lipid matrices is completed with 1H‐LR‐NMR relaxometry, X‐ray diffraction, and microstructural visualization. For the investigated FBs, the average diffusion coefficient D(Δ) decreased with increasing SFC, indicating an increased tortuosity of the diffusive path due to an increasing density of the fat crystal networks as observed by polarized light microscopy. This is also supported by an increase in crystal surface area which is indicated by T2‐relaxation analysis. This study shows that NMR diffusometry is a promising technique for investigation of structure‐function relationships in fat systems. Practical Applications: The study shows that NMR diffusometry is a promising technique for investigation of structure‐function relationships in fat systems. For the first time, oil diffusion in fat crystal networks has been studied by HR‐NMR diffusometry with high gradients to collect the diffusional echo signals, while CONTIN‐analysis has been used for the first time to process the data.

show abstract

Filtration in hydrophobic media: 2. A triglyceride partition phenomenon as observed by tangential filtration of butter oil

Bornaz¹,

Fanni²,

Parmentier³

1995

J Americ Oil Chem Soc

View full text Add to dashboard Cite

Having demonstrated a partition of a hydrophobic medium (butter oil) under crossflow filtration and having tentatively explained the phenomenon on stereoche~mical and saturation basis, the molecular partition was studied by tangential filtration. Under specific hydrodynamic conditions, a filtration phenomenon was demonstrated. The solid fat content (SFC) at 20°C of the fractions obtained was investigated accordingly. When the molecular partition takes place, an SFC divergency between the permeate and the retentate is observed. The amplitude of the divergency depends on experimental conditions. , 1143 1148 (1995). JAOCS72

show abstract

La double cristallisation de l'huile de palme Mise en evidence par diffraction des rayons X et analyse calorimetrique differentielle

Cited by 9 publications

References 3 publications

Comparative analysis of triacylglycerol composition, melting properties and polymorphic behavior of palm oil and fractions

Comparative analysis of triacylglycerol composition, melting properties and polymorphic behavior of palm oil and fractions

Oil Diffusion in Fat Crystal Matrices: Characterization by NMR Relaxometry and Diffusometry

Filtration in hydrophobic media: 2. A triglyceride partition phenomenon as observed by tangential filtration of butter oil

Contact Info

Product

Resources

About