Colloid–monoglyceride composites in hydrophobic solutions

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 384; no. 1; pp. 536 - 542
• Main Authors: Chen, C.H., Terentjev, E.M.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 05.07.2011
• Subjects: Colloids; enthalpy; gelation; gels; hydrophobicity; Lipids; melting; monoacylglycerols; nanoparticles; Phase separation and phase transitions; temperature; Lipids; Phase separation and phase transitions; Colloids
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2011.05.020

Mixing colloids into a monoglyceride–oil gel is a good strategy to control the phase ordering and mechanical features of the resulting composite. The presence of colloids in the gel changes the microstructures of the material and modifies rheological properties to broaden the range of applications. [Display omitted] ► Mixing colloids modified the phase ordering and mechanical features of monoglyceride-oil gels. ► A model of hydrogen bonding between colloids and monoglyceride gel is developed. ► The lamellar ordering transformed into paste by doping with colloids at concentrations above 30 wt%. ► The presence of colloids did not significantly affect the aging process of monoglyceride gels. We study the phase ordering of colloids suspended in the gel phase of aggregated monoglyceride (MG) and the resulting structures. The nano-sized particles are dispersed in a MG–oil matrix to interact with the lamellar structure of MG to form the paste whose rheological feature can be modified by changing particle concentrations. The paste is metastable and ages into the stable β-crystals of MG. In general, the presence of colloids frustrates the lamellar ordering and leads to a decrease in the enthalpy change on melting and a shift of the gelation point to a lower temperature.