聚丙烯腈纳米纤维氨基化改性及重金属吸附性能

Amination modification of PAN electrospun nanofibers and their adsorption to heavy metals

将聚丙烯腈(PAN)溶于N,N-二甲基甲酰胺(DMF)中,采用静电纺丝技术纺制PAN纳米纤维,用戊二醛和超支化聚合物(HBP)对纤维进行氨基化改性,分析了戊二醛和HBP用量,以及反应时间和温度对氨基化改性的影响,通过扫描电镜和红外光谱观察PAN纳米纤维改性前后的形态及微观结构变化,测试了PAN纳米纤维对重金属的吸附效果。结果表明,改性后的PAN纳米纤维对重金属的吸附量是未改性纤维的21倍。

Polyacrylonitrile（PAN）is dissolved in N, N-dimethylformamide （DMF） to electrospun PAN nano- fibers. Then the PAN nanofibers are modified with glutaraldehyde and hyperbranched polymer HBP. The effects of glutaraldehyde concentration, HBP concentration, reaction time and temperature on amino modification of nanofibers are studied. The morphologies and microstructure of nanofibers before and af- ter modification are observed by scanning electron microscopy and infrared spectroscopy. The adsorp- tion effect on heavy metals of modified PAN nanofibers is 21 times higher than that of unmodified fibers.