Abstract：By Friedel-Crafts post-crosslinking reaction with phenol and naphthol, the hypercrosslinked polystyrene adsorbents of LM - 5 and LM - 6 were prepared using gelatin as dispersant and liquid paraffin as porogen. Bromoethane was used as crosslinking reagent to substitute poisonous organic compound of chloromethyl methylether. The physical properties of absorbents illuminate that both phenolic hydroxyl group content and BET surface area of LM - 6 are higher than those of LM - 5. The scanning electron microscope （SEM） spectrogram showed that the hypercrosslinked polymeric adsorbents modified by phenolic hydroxyl group can be viewed as nanometer polymeric resins. The experiments of selective adsorption and equilibrium adsorption show that the adsorbing aniline and benzene on LM -6 in aqueous solution are pushed mainly by physical force. Adsorbing aniline also partly depends on chemical force, and the value of adsorptive enthalpy illuminates the characteristic of hydrogen-bonded sorption. Owing to the forming of hydrogen-bond, the adsorption capacity of aniline on LM - 6 is distinctly higher than that of benzene. Selectivity of LM - 6 adsorbing aniline is slightly enhanced by the increasing of pH value, while the adsorptive capacity of benzene on LM -6 markedly decreases, and the selectivity of aniline distinctly increases.
2008, Vol. 29 
