Multiscale analysis of monoglyceride oleogels during storage

Abstract

Oleogelation offers the possibility to reduce the saturated fatty acid (SAFA) content while maintaining the desired organoleptic properties. Hereby, SAFAs are replaced by other structurants which can create a three‐dimensional network that immobilizes the liquid oil. Depending on the type of structurants, different structuring routes are identified. The use of monoacylglycerols (MAGs) as structurants is a promising approach thanks to their great self‐assembling properties. However, implementation into the food industry is still hampered due to insufficient characterization. This research includes a multiscale analysis of two dynamically produced MAG‐based oleogels (6% MAGs in oil, MO1 and MO2) as a function of the storage time (up to 8 weeks). Slight differences in the production process resulted in pronounced differences in techno‐functional properties of the MAG‐based oleogels. MO1 consisted of larger crystals, which resulted in a lower rigidity, reduced stability, and lower oil binding capacity compared with the other oleogel (MO2). On the nanoscale, it was found that the crystal nanoplatelets (CNPs) of MO1 contained a higher number of lamellae compared with MO2. Additionally, the results obtained with ultra‐small angle x‐ray scattering indicated a larger equivalent diameter for the CNPs of MO1. As a function of the storage time, both oleogels did not show major structural changes up to 8 weeks of storage.

Multiscale analysis of triglycerides using X-ray scattering: implementing a shape-dependent model for CNP characterization

“…7 CNP thickness distribution obtained following the BWA method. [29][30][31] Fig. 8 Ultra small angle X-ray scattering results (I vs. q).…”

“…Alternatively, the first-order SAXS peak (001) was utilized to obtain crystallite thickness distribution, following the procedure described by Rondou et al 29–31 with some minor modifications (Appendix 4, ESI†). From the distribution, the corresponding volume weighted average crystallite size was also calculated.…”

“…The reader is recommended to review the article published by Langford and Wilson (1978) for more information on the physical meaning of the K factor, as a deeper review is out of the scope of this article. 28 Alternatively, the first-order SAXS peak (001) was utilized to obtain crystallite thickness distribution, following the procedure described by Rondou et al [29][30][31] with some minor modifications (Appendix 4, ESI †). From the distribution, the corresponding volume weighted average crystallite size was also calculated.…”

Crystallization behavior of monoglyceride oleogels: A comparison between a fully hydrogenated palm oil and a fully hydrogenated rapeseed oil based monoglycerides

“…To investigate the heterogeneity of the CNP thickness, the Bertaut-Warren-Averbach (BWA) method was used. Hereby, a volume-weighted distribution of the CNP thickness is calculated after applying a Fourier transformation as described by Rondou et al [11]…”

“…The BWA method visualizes the heterogeneity of the sample in terms of a volume-weighted frequency distribution. [11] These distributions are visualized in…”