PAN-O/MMT复合纳米纤维膜的制备及染料吸附性能

FABRICATION OF PAN-O/MMT COMPOSITE NANOFIBROUS MEMBRANE AND ADSORPTION OF DYES

利用静电纺丝法制备了含有不同质量分数(0、1%、3%、5%)有机改性蒙脱土(O/MMT)的聚丙烯腈复合纳米纤维膜,通过亚甲基蓝吸附分析比较了纤维膜的吸附性能。利用粘度、电导率、表面张力分析了MMT的含量对纺丝液性质的影响,利用扫描电子显微镜分析了不同比例O/MMT的加入对所制备的复合纳米纤维的形貌结构的影响,傅里叶变换红外光谱分析结果证实了O/MMT和PAN形成了纳米复合结构,同时借助热重分析仪分析了O/MMT的加入对复合纳米纤维膜热性能的影响。结果表明,随着O/MMT含量的增加,纤维变细、珠节增加,纤维膜的亚甲基蓝吸附能力也同时提高。

In this work,polyacrylonitrile（PAN）/organic-modified montmorillonite（O/MMT） composite nanofibrous membranes with different mass ratio of O/MMT（w=0,1%,3% and 5%） were prepared by electrospinning.The adsorbability of nanofibrous membrances was compared and analyzed by adsorbing methylene blue.The effect of O/MMT amount on the properties of spinning solution was analyzed by viscosity,conductivity and surface tension.The overall morphology of composite nanofibrous membranes with different mass ratio of O/MMT was investigated by scanning electron microscope（SEM）.The composite micro-structure between PAN,and O/MMT was analyzed and confirmed by FT-IR.Besides,the effect of the content of O/MMT on thermal stability property of nanofibrous membranes was investigated by thermogravimetric analysis（TGA）.The experimental results indicated that with the increase of O/MMT amounts,the diameters of the nanofibers decreased and the adsorbability of MB was evidently improved.