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引入超声波振动技术对高浓度聚丙烯腈溶液进行静电纺丝实验,以期在提高纤维力学性能的同时改善高浓度溶液的静电可纺性。通过各种测试和表征分析,研究了不同振动时间对高浓度PAN溶液性质及对纤维膜结构和性能的影响。结果表明:经过超声处理后,PAN溶液的粘度和表面张力显著降低,可纺性得到提高;纤维直径和细度不匀率均有所降低,纤维表面缺陷减少。短时间的振动可使纤维膜的孔径显著减小且孔隙分布变窄,使得纤维间排列更紧密,纤维膜的强度和刚度也都得以提高。
Ultrasonic vibration technology was introduced to electrospinning high concentration polyacrylonitrile solution in order to improve the mechanical properties of the fiber while improving the electrospinnability of high concentration solution. Through various tests and characterization analyzes, the effects of different shaking times on the properties of high concentration PAN solution and on the structure and properties of fiber membranes were studied. The results showed that after ultrasonic treatment, the viscosity and surface tension of PAN solution decreased significantly, and the spinnability was improved. The fiber diameter and the fineness irregularity both decreased, and the surface defects of fiber decreased. A short period of vibration can significantly reduce the fiber membrane pore size and pore narrowing, making the fibers arranged more closely, the fiber membrane strength and stiffness are also improved.