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Applying pulsed corona discharge in hypersaline droplets
Journal of Physics D: Applied Physics ( IF 3.4 ) Pub Date : 2020-11-10 , DOI: 10.1088/1361-6463/abbb06
L F A Almada 1 , K E S Fontes 1 , J O Vitoriano 2 , V R M Melo 2 , F E N Fraga 1 , C Alves Jr 1, 2
Affiliation  

Crystallization of salts in droplets of hypersaline solution placed on a glass slide was monitored and evaluated under controlled conditions of temperature and humidity. Pulsed corona discharge (PCD) was applied over sessil droplets on a glass surface, and its effect in the crystallization is demonstrated for the first time. These results were compared with natural evaporation. Under natural evaporation, crystals are firstly formed on surface, near edges of the drop and grow towards the center, eventually acquiring a pyramidal morphology. Under PCD, a Taylor cone is formed between electrode and droplet surface and then, 4 s after the beginning of the discharge, small crystals were formed on the cone besides a dense crystal film around the discharge incidence point in the droplet. These results are discussed considering existing knowledge about plasma–liquid interaction (PLI) and dynamical of crystal growth. This paper explores an interesting aspect of PLIs, which has both fundamental and practical usefulness, for understanding desalination processes, salt crystallization on water surface and biomedical science for advances in electrosurgical methods.



中文翻译:

在高盐液滴中施加脉冲电晕放电

在受控的温度和湿度条件下,监测和评估置于载玻片上的高盐溶液液滴中盐的结晶。将脉冲电晕放电(PCD)施加到玻璃表面上的sessil小滴上,并且首次证明了其在结晶中的作用。将这些结果与自然蒸发进行了比较。在自然蒸发下,首先在液滴的边缘附近的表面上形成晶体,然后向中心生长,最终获得金字塔形的形态。在PCD下,在电极与液滴表面之间形成泰勒锥,然后在放电开始后4 s,除了液滴中的液滴入射点周围有致密的晶体膜,在锥上还形成了小晶体。考虑到有关等离子体-液体相互作用(PLI)和晶体生长动力学的现有知识,讨论了这些结果。本文探讨了PLI的一个有趣方面,它对于理解淡化过程,在水表面上的盐结晶以及生物医学科学对电外科方法的发展具有基本和实际的实用性。

更新日期:2020-11-10
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