PAN多孔纳米纤维的制备及其吸附性能研究

Preparation and adsorption property of PAN porous nanofiber

以聚丙烯腈(PAN)为原料,以聚乙二醇(PEG)为造孔剂,通过静电纺丝制成PAN/PEG复合纳米纤维,再经水洗去除纤维中的PEG成分制备出PAN多孔纳米纤维。采用傅里叶变换红外光谱仪、扫描电子显微镜、比表面孔径测定仪、分光光度计分别对PAN多孔纳米纤维的结构、形貌、比表面积及吸附性能进行了表征。结果表明:PAN/PEG复合纳米纤维中两组分呈微观相分离状态,通过水洗可去除PEG组分制得PAN多孔纳米纤维;PAN多孔纳米纤维的直径随PEG含量及相对分子质量的增加而减小,而比表面积、孔体积以及吸附能力随PEG含量及相对分子质量的增加而增大。

Polyacrylonitrile/polyethylene glycol （ PAN/PEG） composite nanofiber was prepared by using PAN as raw material and PEG as a pore forming agent via electrospinning process and was produced into PAN porous nanofiber after washing PEG off . The structure , morphology , specific surface area and adsorption property of PAN porous nanofiber were characterized by Fourier transform infrared spectrometry , scanning electron microscopy , pore surface area analysis and spectrophotometry .The results showed that PEG could be washed off for preparing PAN porous nanofiber due to the microscopic phase separation state of PEG and PAN in the composite fiber;and the diameter of PAN porous nanofiber was decreased and the specific surface area , pore volume and adsorption property were increased with the increase of the relatively molecular mass and content of PEG .