Effects of Mechanical Energy on Removal of the Fatty Soil

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  • 油性汚れの洗浄に及ぼす機械力の影響
  • ユセイ ヨゴレ ノ センジョウ ニ オヨボス キカイリョク ノ エイキョウ

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Abstract

The rate curves for fatty soil removal under various mechanical conditions were drawn on the basis of spectrophotometric measurement data taken at different temperatures. The rate constant of soil removal (κ1) and that of the redeposition of removed soil (κ-2) were calculated from rate curves using the rate equation of fatty soil removal developed in the previous paper. The activation energy for removal (Ea) for each mechanical conditions was determined from Arrhenius plots of the rate constants. It was consequently found that with an increase in the mechanical force (rotation of stirrer), the activation energy, Ea, decreased and the detergency is enhanced. Further, the relationship between detergency, Fm, and mechanical force, M, above the temperature for liquid crystal formation in a ternary system, was determined as follows : <BR>Fm=Cexp (-Em0/aM) (1) <BR>where C and a are constants and Em0 is the activation energy related to the contribution of mechanical force. This equation is actually an Arrhenius equation expressing change in detergency as a function of mechanical energy. At a temperature above that for liquid crystal formation, the mechanical force in removal may possibly bring about an increase in the heat energy of the system in a manner similar to that by which rise in temperature causes such an increase.

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