电纺丝形成纤维的过程分析

Process analysis of fiber electrospinning

采用静电喷雾等方法研究了聚丙烯腈 (PAN) ,聚间苯二甲酰间苯二胺 (MPIA) ,聚对苯二甲酰对苯二胺 (PPTA)的电纺丝成纤过程。结果表明 ,高聚物溶液受电场力及表面张力的影响形成喷射细流 ,两种作用力的扰动及作用引起射流的不稳定 ,从而发生射流分裂 ;在相同电纺丝条件下 ,PAN纤维细度远大于PPTA及MPIA纤维细度。

The fiber formation during electrospinning was studied for polyacrylonitrile (PAN),polymetaphenylene isophthamide (MPIA) and poly- p -phenylene terephthalamide (PPTA) through the technologies of electrostatic spraying and buoyant jetting. The results showed that polymer solution was affected by forces in electrostatic field and surface tension,which resulted in the formation of jetting stream which became unstable owing to the disturbance and interaction of those two forces,thus causing jet splitting. PAN fiber had fineness further greater than PPTA and MPIA fibers under the same electrospinning conditions.