论文部分内容阅读
利用静电纺丝技术制备了纳米级别的聚醚酰亚胺(PEI)/聚乙烯吡咯烷酮(PVP)复合纤维,考察了不同的纺丝工艺参数对PEI/PVP纤维形貌的影响。利用扫描电镜对纤维表面进行观察;通过红外光谱分析纤维中复合物间的相互作用;采用示差扫描量热分析(DSC)检测纤维的热性能。实验表明,以二氯甲烷(DCM)和N,N-二甲基乙酰胺(DMAC)为混合溶剂,体积比为5:1～6:1,聚醚酰亚胺与聚乙烯吡咯烷酮重量比为1∶1～1∶5范围内时,静电纺丝高压为12kV,流速为1mL/h时,使用混纺技术可获得表面光滑、粗细均匀的PEI/PVP复合纳米纤维,纤维直径在400～700nm之间。红外光谱和DSC结果表明,聚合物之间通过氢键作用、静电吸引发生相互作用而复合形成纳米纤维,并且复合纤维良好的保持了PEI优异的热稳定性。
Nanometer polyetherimide (PEI) / polyvinylpyrrolidone (PVP) composite fibers were prepared by electrospinning technique. The effects of different spinning parameters on the morphology of PEI / PVP fibers were investigated. Scanning electron microscopy (SEM) was used to observe the surface of the fiber, the interaction between the composites in the fiber was analyzed by infrared spectroscopy, and the thermal properties of the fiber were measured by differential scanning calorimetry (DSC). The experimental results showed that the molar ratio of polyetherimide to polyvinylpyrrolidone was 5: 1 ~ 6: 1 in the ratio of DCM to N, N-dimethylacetamide (DMAC) PEI / PVP composite nanofibers with smooth surface and uniform thickness can be obtained by using the technology of blending when the high pressure of electrospinning is 12kV and the flow rate is 1mL / h in the range of 1: 1 ~ 1: 5. The fiber diameter is 400 ~ 700nm between. The results of FT-IR and DSC show that the polymers interact with each other to form nanofibers through hydrogen bonding and electrostatic attraction, and the composite fibers maintain the excellent thermal stability of PEI.