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配制不同浓度的聚醚砜(PES)纺丝液,在不同纺丝温度和进液速度下,采用静电纺丝技术制备PES纳米纤维膜,并通过扫描电子显微镜观察膜表面的微观形貌,探究纺丝液浓度、进液速度和纺丝温度等条件对纤维的形貌、直径和孔径分布等的影响。结果表明:当纺丝液浓度为28%(质量分数),推进速度为1mL/h,纺丝温度为45℃时,纺丝效果最佳。分别采用电子万能试验机和泡压法滤膜孔径分析仪对优化条件下制得的PES纳米纤维膜的力学性能、通孔孔径及孔径分布进行测试,发现该条件下所得PES纳米纤维膜的弹性模量为33.4MPa,断裂伸长率为38.63%,拉伸屈服应力为3.47MPa;纤维平均直径为0.723μm,平均孔径为3.5689μm,最可几孔径为3.5655μm。静电纺PES纳米纤维膜有望作为高精度滤膜材料使用。
Preparation of different concentration of polyethersulfone (PES) spinning solution, at different spinning temperature and feed rate, the use of electrospinning PES nanofibers prepared by scanning electron microscopy to observe the membrane surface morphology, to explore Spinning solution concentration, feed rate and spinning temperature and other conditions on the fiber morphology, diameter and pore size distribution and so on. The results show that the best spinning efficiency is obtained when the concentration of spinning solution is 28% (mass fraction), propulsion speed is 1mL / h and spinning temperature is 45 ℃. The mechanical properties, pore diameter and pore size distribution of PES nanofibers prepared under optimized conditions were tested by electronic universal testing machine and bubble pressure pore size analyzer respectively. It was found that the elastic properties of PES nanofiber membranes Modulus of 33.4MPa, elongation at break of 38.63%, tensile yield stress of 3.47MPa; fiber average diameter of 0.723μm, the average pore size of 3.5689μm, the most probable pore size of 3.5655μm. Electrospun PES nanofiber membrane is expected to be used as a high-precision filter material.