熔体法同轴电纺PP/(PLA+PEG)核壳超细纤维

Preparation of PP/(PLA+PEG) Core-Shell Ultrafine Fiber by Melt Electrospinning

采用自制的熔体同轴静电纺丝装置，通过控制壳层聚丙烯（PP）与核层聚乳酸（PLA）+聚乙二醇（PEG）的流量大小，制备不同直径、不同结构和不同热焓的核壳结构纤维。研究结果表明，在总流量不变的情况下，核层PLA+PEG流量增加，获得的纤维直径增大，1g／h时平均直径为2.4μm，5g／h时为6μm；PLA+PEG与PP流量相差越大，纤维直径越不均匀，内外层结构也越不均匀；PLA+PEG流量增大，制备的纤维热焓增大。为获得直径均匀、结构均匀、热焓较大的核壳结构超细纤维，PLA+PEG与PP流量比值控制在1～2倍较佳。

Based on self-made coaxial melt electrospinning device,the coaxial fiber with different diameters,different structures and different enthalpy was prepared by controlling the flow rate of PP and PLA+PEG. The results show that the increase of PLA+PEG flow can increase the fiber diameter. When PLA+PEG flow is 1 g/h,the average diameter of core-shell fiber is 2.4 μm,and when PLA+PEG flow is 5 g/h,the average diameter is 6 μm. The increase of the difference between PLA+PEG and PP flow will lead to uniform fibers. When the PLA+PEG flow increases,the enthalpy of fiber increases. Therefore,in order to prepare coaxial fibers with uniform diameter,good structure and high enthapy,the ratio of the PLA+PEG and the PP flow should be controlled in 1–2 times.