But for benzene, when treated with SDM-A there was a turning point in its adsorption isotherm, which corresponding to the dividing point between monomolecular and multimolecular layer adsorption.

在用SDM-A的吸附时，出现折线形的吸附等温线，折线的转折点正是单分子层吸附与多分子层吸附的分界点。

It is favorable for the increase of the adsorption film thickness by increasing the lyophobic chain.The determination of adsorption film thickness verifies the validity of the modification result.

及改在疏水和亲水固体表面的吸附层厚度不同，其分子疏水链段的增加有利于增大其在疏水（煤）表面的吸附厚度。