溶液喷射纺丝参数对聚丙烯腈直径分布的影响

Effect of Solution Blow Spinning Parameters on Diameter Distribution of Polyacrylonitrile Fiber

利用溶液喷射纺丝技术,成功制备聚丙烯腈纤维膜。采用扫描电镜观察纤维膜的形貌,探究不同纺丝工艺参数对纤维直径分布的影响。结果表明:纤维直径与聚合物质量分数、聚合物溶液挤出速度、喷丝孔内径呈正比,并且随上述工艺参数的增加,纤维直径分布较为离散;纤维直径与喷射气流的压强、接收距离呈反比,并且随上述工艺参数增加,纤维直径分布逐渐集中。经分析,获得最优工艺参数:聚合物质量分数为12%,喷射气流的压强为0.15 MPa,接收距离为70 cm,溶液挤出速度为0.3 mL/min,喷丝孔内径为0.32 mm。

In this study,polyacrylonitrile(PAN)fiber membrane had been fabricated successfully by the solution blow spinning technology.Meanwhile,the morphology of the PAN fiber membrane was analyzed by scanning electron microscopy(SEM)in order to further study the effect of different spinning process parameters on the diameter distribution of the fiber.The results show that the fiber diameter is proportional to the polymer mass concentration,polymer solution extrusion speed,and the inner diameter of the spinneret.In addition,the distribution of fiber diameter is more discrete with the increase of the above process parameters.Moreover,the fiber diameter is inversely proportional to the pressure of the jet stream and collection distance,and the distribution of fiber diameter is gradually concentrated with the increase of the above process parameters.After analysis,the optimal process parameters are obtained as follows:mass concentration of the polymers is 12%,the pressure is 0.15 MPa,the collection distance is 70 cm,the solution extrusion speed is 0.3 mL/min and the inner diameter of the spinneret is 0.32 mm.