水溶液中纳米Fe2O3光引发聚合制备聚丙烯酰胺

Preparation of Polyacrylamide by Photo-Initiated Polymerization in Water Solution with Nano-Fe_2O_3 as Initiator

以纳米Fe2O3为光引发剂引发丙烯酰胺(AM)自由基聚合得到聚丙烯酰胺(PAM),并与有机类光引发剂硫杂蒽酮封端聚乙烯亚胺(PEI-TX)进行了对比。考察了不同聚合条件对纳米Fe2O3引发AM聚合反应的影响。实验结果表明,在相同聚合条件下,纳米Fe2O3的引发效率低于PEI-TX;以纳米Fe2O3为光引发剂的聚合体系中,较适宜的聚合条件为:纳米Fe2O3浓度1.0mmol/L,AM含量20%(w),光强9.9 mW/cm2,光聚时间20 min。以纳米Fe2O3为光引发剂得到的PAM具有较好的絮凝性能,其絮凝效果优于以PEI-TX为光引发剂得到的PAM。

Polyacrylamides（PAM）were prepared by the free radical polymerization of acrylamide（AM） with nano-Fe2O3 as the photoinitiator. The efficiency of nano-Fe2O3 was compared with an organic initiator, thioxanthone-terminated poly（ethylene imine）（PEI-TX）. The effects of nano- Fe2O3 photoinitiation system under reaction conditions were investigated. The results indicated that, under the same conditions, the initiation efficiency of nano-Fe203 was lower than that of PEI-TX. The optimum reaction conditions for the photo-initiated polymerization system with nano-Fe2O3 as the initiator were 1.0 mmo/L nano-Fe2O3, 20%（w） AM, light intensity of 9.9 mW/cm^2 and reaction time of 20 min. PAM prepared with nano-Fe2O3 as initiator has better flocculation performance than PAM prepared with PEI-TX as initiator.