【摘要】 采用静电纺丝法制备取向性聚己内酯微纳纤维,通过单因素分析法考察电极距离、溶液喷射速度、电压、针头型号、接收距离和溶液体积对取向性聚己内酯微纳纤维性能的影响。将质量分数为10%的聚己内酯(polycaprolactone,PCL)溶液注入2 mL的注射器,设置静电纺丝机电极距离分别为1,2,3,4,5 cm,喷射速度分别为0.053,0.088,0.106 mL/h,电压分别为18.8,20.8,22.6 kV,针头型号分别为19,21,25,接收距离分别为15,19,21 cm,体积分别为0.3,0.5 mL,制备不同取向分布的PCL纤维。采用光学显微镜观察纤维形貌,并进一步采用接触角测试、力学性能测试、稳定性评价等方法对材料性能进行表征。结果表明:不同的参数下可以得到不同取向性的PCL纤维分布;当电极距离为4 cm、溶液体积为0.3 mL、电压为18.8kV、喷射速度为0.088 mL/h、接收距离为15 cm、针头型号为19时,静电纺PCL微纳纤维取向性最佳,且具有较好的润湿性能、力学拉伸性能以及良好的稳定性。更多还原

【Abstract】 Oriented polycaprolactone micro/nano fibers are prepared by electrospinning method. The electrode distance,solution jet velocity, voltage, needle type, receiving distance and solution volume are investigated by single factor analysis to determine the effect on the fiber properties. The polycaprolactone(PCL) solution with a mass fraction of 10% was injected into a 2 mL syringe, and the electrode distance of the electrospinning machine was set to 1, 2, 3, 4, and 5 cm respectively, ejection speed was 0.053, 0.088, and 0.106 mL/h respectively, voltage was 18.8, 20.8, 22.6 kV, needle type was 19, 21, 25,receiving distance was 15, 19, 21 cm, volume was 0.3, 0.5 mL, PCL spinning fibers with different orientation distribution were prepared. The fiber morphology was observed by optical microscope, and the properties were further characterized by contact angle test, mechanical property test and stability evaluation. The results show that different orientations of polycaprolactone fiber distribution can be obtained under different parameters; when the electrode distance is 4 cm, the solution volume is 0.3 mL, the voltage is 18.8 kV, the injection speed is 0.088 mL/h, the receiving distance is 15 cm, and the needle type is 19, and the electrospunpolycaprolactone micro/nano fiber has the best orientation, the favorable wettability, the good mechanical tensile properties and stability.更多还原