为提高射流喷射的稳定性和薄膜成型效率,设计开发了具有气流聚焦功能的静电喷雾装置.仿真研究了喷雾空间电场和气体流场的分布特性,开展了静电喷雾实验研究,分析了喷雾射流喷射行为,讨论了静电喷雾薄膜沉积面积和纳米颗粒直径的控制规律.结果表明,辅助气流的加载能够有效提高喷嘴处射流的喷射速度,促进射流拉伸细化,对减小纳米颗粒直径、提高颗粒均匀性都具有很好的促进作用.%Electrostatic spray spinneret with gas focusing was designed herein,which improved the stability of electrostatic spray jet and the efficiency of micro thin film deposition.Distributions of space electric field and flow field of gas were simulated,regularity of the spray was analyzed,and effects of processing parameters on the deposition areas of the film and diameters of nanoparticles were discussed.Experimental results show that,the jet inj ection velocity is increased by loading of auxiliary flow,and continuous stretching of auxiliary flow will lead to decrease the diameters of nano-particles and to improve the nanopartides homogeneity.
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