聚砜酰胺/聚氨酯纳米复合纱线的制备与表征

Preparation and Characterization of Polysulfone Amide/Polyurethane Composite Yarns via Electrospining

采用自制的静电纳米纤维成纱装置,制备双组分聚砜酰胺(PSA)/聚氨酯(PU)纳米复合纱线,并对其进行各项性能表征。利用摄像机捕捉了在静电场下纺丝液牵伸成纳米纤维后并合加捻成纱的瞬时动态过程;运用COMSOL软件模拟不同针头配置下产生的电场分布,并对其进行比较分析。通过对复合纱线的SEM表征、力学性能测试和热性能测试,得出结论:(1)双组分纳米纱线的外观成形良好,加PU后的PSA复合纱线的断裂强力得到明显提高;(2)PSA纳米纤维的存在可提高PU纤维的耐热稳定性;(3)两种材料的复合纺纱,可以实现其力学性能和耐热性能互补的效果。

A novel approach and the related equipment of electrospinning has been developed to fabricate a new yarns composed of polysulfone amide （PSA） and polyurethane（PU）. As the spinnerets, voltage and rotating speed have effects on the structure and properties of the yarns, three series of yarns were prepared using the self-developed equipment. The composite yarns were characterized by SEM investigation, mechanical properties and thermal performance. The results showed that nanometer fiber yarns formed good appearance. Breaking strength increased significantly with mixing PU in PSA and thermal properties have improved a lot with blending PSA in PU, so that it can combine the excellent thermal properties of the PSA and the excellent mechanical properties of polyester.