Premium
Mixed monolayers of acylglycerols on sugar aqueous solutions
Author(s) -
de la Fuente Feria Julia,
Patino Juan M. Rodríaguez
Publication year - 1996
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690420522
Subject(s) - monolayer , chemistry , aqueous solution , sugar , langmuir , mole fraction , surface pressure , chromatography , thermodynamics , analytical chemistry (journal) , chemical engineering , organic chemistry , biochemistry , physics , mechanics , engineering
Structural Characteristics of mono‐ and distearin mixed monolayers spread on aqueous solutions containing sugar (glucose or sucrose) at 0.5 mol/L were studied as a function of temperature and interfacial and subphase compositions. The compression isotherms were obtained using an automated Langmuir‐type film balance over a temperature range of 10 to 40°C. The results show an expansion in the structure of the mixed monolayer with sugar in subphase. Nonideal mixing of the component at interface was observed with positive deviation from the additivity rule. This fact is indicative of the presence of repulsive interactions between the two lipids on sugar aqueous solutions. The mixed monolayers with a monostearin molar fraction less than 0.8 are stable from a thermodynamic point of view. Mixed monolayer stability depends on monolayer composition, temperature, and surface pressure with different order of magnitude.