静电纺聚酰胺6纳米纤维膜的制备及其性能

Preparation and properties of electrospun polyamide 6 nanofibrous membranes

为制备功能性的聚酰胺6(PA6)纳米纤维膜,采用静电纺丝技术制备PA6/聚乙烯吡咯烷酮(PVP)共混纳米纤维膜,并对纤维膜的表面形貌、力学性能和亲水性能进行表征。结果表明,当PA6纺丝液质量分数为28%,PVP的加入量为0.5 g时,纤维膜的微观形貌较好,制备出的纤维直径为132 nm,断裂强度为9.68 MPa,断裂伸长率为31.89%,亲水角为(32.4±1.2)°。研究了不同纺丝时间对纤维膜空气过滤性能的影响,当纺丝时间为0.5 h时,纤维膜具有较好的过滤性能,过滤效率为99.5%,过滤压降为476 Pa。红外分析结果表明,在PA6中加入PVP,在搅拌的过程中二者均匀融合,PVP小分子填充在PA6大分子中,可使纤维膜的亲水性提高。制得的PA6纳米纤维膜可作为加湿器中的湿膜材料得到应用。

Polyamide 6（ PA6） with modifier（ polyvinylpyrrolidone,PVP） was electrospun by adjusting the processing parameters to fabricate hydrophilicity PA6 nanofibrous membranes. The morphology,mechanical properties and hydrophilicity of electrospun fibers were characterized. When the PA6 spinning solution concentration of 28% and the amount of 0. 5 g PVP were determined,the diameter of the fibers is 132 nm,the fracture strength is 9. 68 MPa,the elongation at break is 31. 89% and the hydrophilic angle is（ 32. 4 ± 1. 2） °. The filtration performances of the fibrous membrane with the different spinning time were analyzed. The membrane with the spinning time of 0. 5 h exhibits a better performance with efficiency of 99. 5% and resistance of 476 Pa. The mechanism of the improved hydrophilicity of PA6 was analyzed by FT-IR. The increased amide group from PVP enhances the hydrophilicity of PVP / PA6 nanofibrous membranes significantly. Therefore,this membrane is expected to be applied in humidifier wet film materials.