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.

木钠及改性木钠在疏水性和亲水性固体吸附层厚度不同，分子疏水链段有利于大在疏水性（煤）吸附厚度。

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处理苯吸附时，出现折线形吸附等温线，折线转折点正好是单分子层吸附与多分子层吸附分界点。