为了改善高浓度聚丙烯腈(PAN)溶液的静电可纺性及其电纺纤维的形态结构，引进超声波振动技术对溶液进行处理，测定了溶液的电导率和流变性，并对不同振动处理后电纺纤维的形貌及密度进行了表征，分析研究振动功率和时间对溶液静电可纺性、纤维形貌及紧密度的影响规律。结果表明，超声波振动处理后，高浓度PAN溶液流动性能变好，电导率增加，溶液的静电可纺性提高，且振动时间为4 min、振动功率为720 W时，溶液的可纺性最佳；在最优条件下，纤维直径由原来的3180.46 nm减小到2594.41 nm，细度不匀率由19.6%降低到15.16%；密度则由1.138 g/cm3增加到1.208 g/cm3。%Sonication treatment was introduced to improve the electrospinnability of high-concentration polyacrylonitrile (PAN) solution. The influences of ultrasonic vibration time and power on the solution properties including electric conductivity and rheological property were measured. The surface morphology as well as the density of the obtained ifbers were characterized. The experimental results indicate that the electrospinnability of the PAN solutions are significantly improved by the sonication treatment due to the increase of the rheological property and electric conductivity of the solutions. The optimized condition for the best electrospinnability is 4 min sonication at a power of 720 W,the diameter of the electrospun ifber reduces from the original 3180.46 nm to 2594.41 nm and the unevenness rate reduces from 19.6%to 15.16%under the optimal condition, on the contrary, the ifber density increases from 1.138 g/cm3 to 1.208 g/cm3.
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