Photo-induced Polymerization Of MMA/Cyclodextrin Complex In Aqueous Solution And Preparation Of Oil-Absorption Resin Using Modified Cyclodextrin

Cyclodextrins(CDs)are cyclic oligoacchrides,consisting of 6(α),7(β) or 8(γ)units of 1,4-linked glucose.They have been widely investigated because of their toms-sharp structure which consists of a hydrophobic cavity and a hydrophilic outer side.In the last decade,CDs(especiallyβ-CD and its derivatives)were found to be able to include water-insoluble organic compounds to form inclusion complexes which can dissolve in water and undergo reactions in the aqueous medium,such as polymerization,hydrolysis, and oxidation.In this study,polymerizations of methyl methacrylate/hydroxypropyl-β-cyclodextrin (HP-β-CD)complex(MMA/HP-β-CD)were carried out under UV irradiation in aqueous solution with Irgacure 2959(4-(2-hydroxyethoxy)-phenyl-(2-hydroxy-2-propyl)ketone) as photoinitiator at room temperature. The effects of some principal factors,including UV irradiation intensity, initiator concentration,and the ratio of HP-β-CD to MMA,on the polymerization were investigated in detail.According to the experiment,the resulting PMMA precipitated spontaneously from the solution during polymerization in the absence of any precipitator.About 95wt.-%of the HP-β-CD remained in the solution after polymerization and the reusability of this residual HP-β-CD was experimentally demonstrated.Using modifiedβ-CD to fabricate oil absorption resin was also investigated.β-CD was successfully modified by GMA(β-CD-MA)in the present of catalyst DMAE Oil absorption resin consisting of crosslinked copolymer of n-octadecyl acrylate,butyl methacrylate andβ-CD-MA was synthesized.The absorption capacity of the resin was about 38 g/g for toluene, 73 g/g for chloroform,and 12 g/g for peanut oil.The oil retention was more than 94%...