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以环状马来酸酐为改性剂,分别采用改进的二步种子溶胀法和悬挂双键接枝法制得了高亲水性的聚(苯乙烯-二乙烯苯)/马来酸酐共聚多孔微球(PSt-DVB-co-MAH)及聚(苯乙烯-二乙烯苯)接枝马来酸酐多孔微球(PSt-DVB-g-MAH)。用FT-IR证明了改性产物中马来酸酐的存在;用TEM、SEM观察了改性前后微球的内、外部形貌;酸碱滴定法考查了MAH加入量对微球孔径的影响;用极性熊果苷的吸附对比实验验证了改性效果。结果表明,两种方法制得的改性微球在形态上与没改性前的微球略有差别,但当共聚法St∶DVB∶MAH=10∶8∶2及接枝法P(St-DVB)微球∶MAH=5∶3时,所得亲水微球均保持了较好的多孔形貌且亲水性比未改性的增大5倍以上。
Poly (styrene-divinylbenzene) / maleic anhydride copolymerization porous microspheres with high hydrophilicity were obtained by cyclic maleic anhydride as modifier, using modified two-step seed swelling and dangling double bond grafting (PSt-DVB-co-MAH) and poly (styrene-divinylbenzene) grafted maleic anhydride porous microspheres (PSt-DVB-g-MAH). The presence of maleic anhydride in the modified product was confirmed by FT-IR. The inner and outer morphology of the microspheres before and after modification were observed by TEM and SEM. The influence of the amount of MAH added on the microspheres’ pore size was examined by acid-base titration. The adsorption experiment of polar arbutin was used to verify the modification effect. The results show that the modified microspheres prepared by the two methods are slightly different in morphology from the microspheres without modification, but when the copolymerization method is St: DVB: MAH = 10: 8: 2 and grafting method P (St -DVB) microspheres: MAH = 5: 3, the resulting hydrophilic microspheres maintained a good porous morphology and hydrophilic than unmodified increased more than 5 times.