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吸附层厚度不同，其分子疏水链段增加有利于增大其在疏水性（煤）吸附厚度。