【摘要】 将不同质量分数的聚丙烯腈(PAN)纺丝液进行静电纺丝,制备了PAN纳米纤维多孔膜,并对静电纺PAN纳米纤维膜的形貌、纤维直径、孔隙率和比表面积、力学性能以及过滤性能进行表征和测试。结果表明,随着PAN质量分数的增加,纤维的平均直径明显增加;对应的静电纺多孔纤维膜的孔隙率和比表面积都减小、过滤效率降低。其中,由PAN质量分数为10%的纺丝液制备的多孔纤维膜具有较高的孔隙率和比表面积,分别为51.40%和17.06 m2/g,同时它的过滤效率最高,在过滤速度为5.3 cm/s,实验颗粒尺寸为0.06～0.43μm时,其过滤效率在99.9%～99.993%之间,最易渗透粒径约为0.14μm。更多还原

【Abstract】 Polyacrylonitrile(PAN) nanofibrous porous membranes were prepared by electrospinning of PAN solutions with different mass concentrations and then characterized by morphology,diameter of fiber,porosity and specific surface area,mechanical properties and filtration efficiency.The results show that the average diameter of the nanofibers increases as the mass concentration of spinning solutions increases,but the porosity and specific surface area,and filtration efficiency of the corresponding nanofibrous porous membranes decrease.In comparison,the porous fibrous membrane which was electrospun from the solution with 10% mass concentration presents a quite high porosity and specific surface area,which are respectively 51.40% and 17.06 m2/g;moreover,it also displays the best filtration efficiency among all the samples.When the filtration rate is 5.3 cm/s and experimental particle size is 0.06~0.43 μm,its filtration efficiency is between 99.9% and 99.993%,and the most easily penetrating particle size is about 0.14 μm.更多还原