水溶性卟啉基聚N-异丙基丙烯酰胺的制备及亚甲基蓝降解性能

Preparation of water-soluble porphyrin-based poly(N-isopropylacry lamide) and its degradation performance of methylene blue

利用卟啉化合物易被修饰的特点,采用可逆加成断裂链转移(RAFT)聚合的方法,以偶氮二异丁腈为引发剂,与单体N-异丙基丙烯酰胺聚合,制备卟啉基聚N-异丙基丙烯酰胺(Por-PNIPAM)。通过红外光谱、核磁共振氢谱对聚合物的结构进行表征。结果表明,已成功合成了目标产物;通过GPC凝胶渗透色谱可知,Por-PNIPAM的PDI为1.05~1.10,平均分子质量随着反应时间的延长和单体浓度的增大而增大,呈现出“活性-可控”的聚合特征。Por-PNIPAM用于降解亚甲基蓝,当亚甲基蓝溶液浓度为2×10^-5 mol/L、聚合物浓度为2×10^-5 mol/L、照射时间为250 min时,降解率达到45%左右。

Making use of the characteristics of porphyrin compounds that could be easily modified,porphyrin-based poly(N-isopropylacrylamide)(Por-PNIPAM)was prepared by reversible addition fragmentation chain transfer(RAFT)polymerization using azodiisobutyronitrile as initiator and N-isopropylacrylamide as monomer.The structure of polymers were characterized by the infrared spectroscopy,hydrogen nuclear magnetic resonance spectrometer.The results showed that the target product had been synthesized successfully.The gel permeation chromatography showed that the PDI of Por-PNIPAM was 1.05~1.10,and the average molecular weight increased with the increase of reaction time and monomer concentration.Polymers exhibited the polymerization characteristics of"active-controllable".Por-PNIPAM was used to degrade methylene blue.When the concentration of methylene blue solution was 2×10^-5 mol/L,the concentration of polymer was 2×10^-5 mol/L and the irradiation time was 250 min,the degradation rate reached about 45%.