PCL/PVP电纺复合纤维膜的制备及其亲疏水性能研究

采用静电纺丝技术制备了聚己内酯(PCL)/聚乙烯吡咯烷酮(PVP)共混纤维膜,研究了PCL/PVP配比、纺丝液浓度和PVP相对分子质量对纤维形貌及直径的影响,并测定了纤维膜的接触角以研究其亲疏水性能。结果表明:随着共混聚合物中PVP-K90比例的增加,纤维的平均直径减小;当纺丝液中聚合物质量分数在10%～14%范围内变化时,纤维的形貌改变不大,但直径随着质量分数的增加有所增大;PVP相对分子质量对复合纤维膜的形貌结构和亲疏水性能影响较大,含PVP-K30(相对分子质量40 000)的复合纤维膜比含PVP-K90(相对分子质量800 000)的复合纤维膜有较好的形貌,且PVP-K30可明显改善复合纤维膜的亲水性能。

The preparation of PCL/PVP composite fiber membranes by electrospinning and study on its properties of hydrophility/hydrophobicity

Polycaprolactone(PCL)/polyvinylpyrrolidone(PVP)composite fiber membranes were prepared by electrospinning,the influence of PCL-PVP mass ratios,spinning liquid concentration and PVP relative molecular mass on the morphology of PCL/PVP composite fiber membranes were investigated,the properties of hydrophility/hydrophobicity of the composite fiber membranes were studied by measuring their contact angle.The results showed that the fibers average diameter was decreased with increasing the content of PVP-K90.While polymer mass fraction was between10% and 14% in spinning liquid,the morphology of fiber changed not much and the diameter increased by enhancement of the mass fraction.PVP relative molecular mass had large influence on the morphology and the hydrophility/hydrophobicity of composite fiber membrane,PVP-K30 had better morphology than PVP-K90,simultaneously,PVP-K30 improved the properties of hydrophility of the composite fiber membranes significantly.