Abstract: Per(2,6-di-O-allyl)-β-cyclodextrin was prepared by the modification of β-cyclodextrin with allyl bromide using sodium hydroxide as a catalyst. The effect of catalyst, modifying agent, time, and temperature on the yield of the product was discussed. The best reaction condition was obtained as follows: n(β-CD)∶n(C3H5Br)=1∶76.0, n(NaOH)∶n(C3H5Br)=1.34∶1, temperature was 5 ℃ and time was 48 h. The porous β-cyclodextrin copolymer were synthesized by concentrated emulsion polymerization with the mixture of allyl-β-CD, styrene, DVB as the continuous phase and an aqueous solution of K2S2O8 and K2SO4 as the dispersed phase. The effect of β-cyclodextrin on the hydrophilic property and phenol adsorption capability of the porous materials was studied. It was found that the porous materials presented obvious improvement in both hydrophilicity and phenol adsorption capability when β-cyclodextrin was introduced.

Key words: per(2, 6-di-O-allyl)-β-cyclodextrin, styrene, concentrated emulsion, copolymerization, porous material, adsorption