Effect of temperature on the adsorption of phosphatidylcholine by silicon-containing materials with various degrees of order

Features of the adsorption of phosphatidylcholine (PCh) by inorganic silicon-containing materials with various degrees of order (MCM-41, MMC-1, and silica gel) from solutions in hexane under equilibrium conditions in the temperature range of 283-323 K are considered. It is found that the adsorption of the phospholipid within the C (e) = (0.6-4.0) x 10(-4) mmol/dm(3) range of concentrations on the investigated materials is characterized by monomolecular absorption. Differential thermodynamic characteristics (Delta G, Delta H, and Delta S) of the sorption of PCh by silicon-containing materials with various degrees of order in the temperature range of 283-323 K are considered. An increase in the affinity of silicon-containing materials toward the phospholipid upon an increase in the temperature of the sorption process is observed.