将二甲基二烯丙基氯化铵(DADMAC)与乙烯吡咯烷酮(VP)共聚得到阳离子型的聚乙烯吡咯烷酮(CPVP),并分别合成了聚二甲基二烯丙基氯化铵(PDADMAC)和聚乙烯吡咯烷酮(PVP)均聚物,用粘度法测定了三者的粘均相对分子质量,用红外光谱表征了其结构.将合成的CPVP与核糖核酸(RNA)以不同比例混合,研究CPVP负载RNA的能力,并与PDADMAC及PVP的负载性能做比较.结果发现,与PDADMAC及PVP相比,当CPVP与RNA按质量比2∶1混合时,形成的复合体纳米粒的平均粒径约为300 nm,分散度指数为0.0966,粒径分布较窄.
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