アルミニウムセッケンの物理化学的研究(第9報) : ステアリン酸アルミニウム単分子膜の表面圧および水に対する蒸発比抵抗

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Surface pressure-area and specific water evaporation resistance -surface pressure curves were obtained for the monolayers of aluminum stearates of various composition. The pressure-area curves varied with time at which the monolayers were spread after the dissolution of aluminum stearates in benzene or chloroform. Both curves, however, became nearly constant and identical when they were measured two days after the dissolution. The mono-and 1.5-soaps were unstable liquid-condensed films, while the diand 2.5-soaps were solid-condensed films. The stability of these monolayers decreased in the order of 2.5>di>1.5>mono, following the decrease of hydrophobic character of these compounds from which monolayers were formed. Specific evaporation resistance was measured as a function of surface pressure by the desiccant method. Specific resistance of monolayer of aluminum distearate, which was spread from either benzene or chloroform, was identical. Specific resistance of monolayer of the 1.5-soap was greater than the value calculated by mixture rule as a mixture of the monosoap and the disoap, while that of the 2.5-soap was smaller than that as a mixture of disoap and stearic acid. These deviations were explained on the basis of the intermolecular interaction.
公益社団法人日本薬学会の論文
1970-09-25