亲水改性聚己内酯纤维膜的熔体静电纺丝研究

采用HM-531对PCL进行亲水改性,研究其用量对共混体系的熔融指数、接触角和拉伸性能的影响,再利用熔体电纺三维打印,探究了电压、驱动气压和喷头高度对纤维膜微观形态结构和接触角的影响,筛选最佳的工艺参数.结果表明,随着HM-531用量的增加,共混物的熔融指数增大,接触角不断降低,添加质量分数为3％的HM-531时,共混物的熔融指数为9.1 g/10 min,较未添加时增加了89.6％,接触角从72.92°降低到10.22°,亲水性能显著改善;共混物的拉伸强度和断裂伸长率呈现先增大后减小的变化趋势,在HM-531质量分数为3％时两者达到最大值,拉伸强度为26.8 MPa、断裂伸长率为1338.5％;在电压20 kV、气压0.08 MPa和喷头高度5 cm条件下,所制熔体电纺膜的纤维直径最均匀、接触角为10.52°.该熔体电纺膜具有纤维大小一致、外观良好和亲水性能优异等特点,在气调包装保鲜膜和药物快速释放载药膜等领域具有良好的应用前景.

Study on Melt Electrospinning of Hydrophilic Modified Polycaprolactone Fiber Membrane

HM-531 was used to modify the hydrophilicity of PCL, and the influences of its content on the melt index, contact angle and tensile properties of the blend system were studied. The influences of voltage, driving air pressure and nozzle height on the microstructure and contact angle of the fiber membrane were explored using a melt electrospinning three-dimensional, and the best process parameters were screened. The results showed that with the increase in HM-531 content, the melt index of the blend increased, and the contact angle decreased continuously. When the content of HM-531 was of a mass fraction of 3%, the MFR of the blend was 9.1 g/10 min, with an increase of 89.6% compared to that of not being added. The contact angle was reduced from 72.92° to 10.22°, and the hydrophilic properties were significantly improved. The tensile strength and elongation at break of the blend showed a trend of first increasing and then decreasing. When the mass fraction of HM-531 was 3%, the tensile strength and the elongation at break reached the maximum, which were 26.8 MPa and 1338.5% respectively. Under the conditions of a voltage of 20 kV, an air pressure of 0.08 MPa and a nozzle height of 5 cm, the fiber diameter of the melt electrospun membrane was the most uniform and the contact angle was 10.52°. The melt electrospun membrane was characterized with uniform fiber size, good appearance and excellent hydrophilic performance, which had good application prospects in the fields of modified atmosphere packaging cling film and rapid drug release film.