Structural and mechanical properties of organogels: Role of oil and gelator molecular structure

Food Research International
Miguel A CerqueiraAntónio A Vicente

Abstract

This work aims at evaluating the influence of oil and gelator structure on organogels' properties through rheological measurements, polarized microscopy and small-angle X-ray scattering (SAXS). Four different food-grade gelators (glyceryl tristearate - GT; sorbitan tristearate - ST; sorbitan monostearate - SM and glyceryl monostearate - GM) were tested in medium-chain triglyceride and high oleic sunflower (MCT and LCT, respectively) oil phases. Organogels were prepared by mixing the oil phase and gelator at different concentrations (5, 10, 15, 20 and 25%) at 80°C during 30min. All organogels presented birefringence confirming the formation of a crystalline structure that changed with the increase of the gelator concentration. Through the evaluation of SAXS peaks it has been confirmed that all structures were organized as lamellas but with different d-spacing values. These particularities at micro- and nanoscale level lead to differences in rheological properties of organogels. Results showed that the oil type (i.e. medium- and long-chain triglyceride) and hydrophilic head of gelators (i.e. sorbitan versus glyceryl) exert influence on the organogels physical properties, but the presence of monostearate leads to the formation of ...Continue Reading

Citations

Jul 11, 2019·Food Science & Nutrition·Elahe KamaliHassan Ahmadi Gavlighi
Sep 4, 2020·Scientific Reports·Fabio ValoppiEdward Haeggström
Feb 9, 2018·Food & Function·Artur J MartinsMiguel A Cerqueira
Feb 6, 2019·Food Research International·Artur J MartinsAntónio A Vicente
Nov 8, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Runan ZhaoYan Li
Oct 19, 2020·Advances in Colloid and Interface Science·Anna MagriTomy J Gutiérrez
May 22, 2019·Food Research International·Thais Lomonaco Teodoro da SilvaSilvana Martini
Aug 30, 2021·Food Chemistry·Aurélie MoniéJean-Christophe Garrigues
Dec 15, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Leïla KhacefYaocihuatl Medina-Gonzalez

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