中文摘要：

随着纳米技术的兴起，纳米纤维受到了广泛的关注，降低纤维直径可以使材料获得更优异的性能，如高比表面积、柔韧性和机械性能等，静电纺丝法是一种制备纳米纤维的简单有效的方法，纤维的直径可以通过调节纺丝条件（如电压、流速、距离）、溶液的参数（如浓度、粘度、表面张力和导电率等）以及环境条件（如温度、湿度）等进行控制^[1,2]。

英文摘要：

Uhrafine polystyrene（PS） nanofibers were prepared via the simple electrospinning technique. Uni-form and smooth PS nanofibers were obtained with adding the organic salt BTEAC into the PS solutions and ad-justing the concentration of PS solutions. Without the addition of BTEAC, PS fibers with few beads could be a-chieved with a PS mass fraction of 20%, and the average diameter of the fibers was 280 nm. The addition of the organic salt BTEAC could lower the critical concentration for the fiber formation and reduce the amount of beads on the fibers. Unltrafine PS fibers without any beads were obtained with a PS mass fraction of 10% and an ionic salt mass fraction of 0. 5%. The average diameter of the fiber was successfully reduced to 100 nm. The influence of the salt concentration on the morphology and diameter of the PS fibers was also investigated. The viscosity and surface tension changes were measured with changing the concentration of BTEAC. The re-sults show that the changes were so small that these factors could be ignored. It was suggested that variations of the fiber diameter should be mainly resulted from the changes of conductivity and conformation of the polymer chain as the concentration of BTEAC is varied.