Assembly pattern of multicomponent supramolecular oleogel composed of ceramide and lecithin in sunflower oil: self-assembly or self-sorting?

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  • Additional Information
    • Source:
      Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 101549033 Publication Model: Print Cited Medium: Internet ISSN: 2042-650X (Electronic) Linking ISSN: 20426496 NLM ISO Abbreviation: Food Funct Subsets: MEDLINE
    • Publication Information:
      Original Publication: Cambridge : Royal Society of Chemistry
    • Subject Terms:
      Ceramides/*chemistry ; Lecithins/*chemistry ; Sunflower Oil/*chemistry; Calorimetry, Differential Scanning ; Crystallization ; Gels/chemistry ; Hydrogen Bonding ; Microscopy, Polarization ; Rheology ; Spectroscopy, Fourier Transform Infrared ; Temperature ; X-Ray Diffraction
    • Abstract:
      Ceramide (CER) is a novel food-grade organogelator with beneficial health effects. Lecithin (LEC) is not an effective gelator; however, it may alter the crystal morphology of the host gelator in a multicomponent system. In this paper, LEC and CER were mixed at various molar ratios in sunflower oil leading to different gelation behaviors. It was interesting since in this multicomponent system, gels formed when there was more less-effective gelator (LEC), while gels hardly formed when there was more effective gelator (CER). This drew our attention since there might not be only one kind of assembly mode between the LEC and the CER. A comprehensive rheological investigation was conducted. It was found that at specific ratios (6L4C and 5L5C), strong gels (G' > 1.0 × 105 Pa) formed with superior oil binding capacity (up to 99.84%). Meanwhile, these gels exhibited higher tolerance level to permanent deformation than the monocomponent gel. However, weak gels were observed off the optimal ratio (8L2C, 7L3C, 4L6C and 3L7C). The crystal morphology of gels drastically changed with change in gelator proportion. Short needle-like crystals and small rosette crystals were observed in 6L4C and 5L5C, respectively, while other samples exhibited spherulite-shaped crystals (8L2C, 7L3C, 4L6C, and 3L7C), which differed from any of the monocomponent gel structures (10L0C and 0L10C). Results from differential scanning calorimetry and polarized light microscopy suggested that the macroscopic properties are determined by the morphology and distribution of crystals rather than the crystallinity of the matrix. Fourier transform infrared spectroscopy results indicated the presence of van der Waals forces and the formation of hydrogen bonding between the phosphate of the LEC and the amide group of the CER. The above results indicated that the LEC and CER co-assembled at approximately equal molar ratio, and the redundant LEC or CER at other ratios self-sorted to combine with the co-assembled fibers by lateral association, leading to potentially different underlying microstructures. These multicomponent supramolecular oleogels with high tunability may further broaden their applicability in various healthy lipid-based product formats.
    • Accession Number:
      0 (Ceramides)
      0 (Gels)
      0 (Lecithins)
      0 (Sunflower Oil)
    • Publication Date:
      Date Created: 20200908 Date Completed: 20210426 Latest Revision: 20210426
    • Publication Date:
      20240829
    • Accession Number:
      10.1039/d0fo00635a
    • Accession Number:
      32896846