Size-selective separation of submicron particles in suspensions with ultrasonic atomization
Size-selective separation of submicron particles in suspensions with ultrasonic atomization
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DOI：
10.1016/j.ultsonch.2014.03.033
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发表时间：
2014-11-01
影响因子：
8.4
通讯作者：
Oka, Naoyoshi
中科院分区：
文献类型：
--
作者：
Nii, Susumu;Oka, Naoyoshi
含有二氧化硅或聚苯乙烯乳胶的水悬浮液被超声雾化以分离特定尺寸的颗粒。借助包含具有窄尺寸分布的细小液滴的雾，成功地将有限尺寸范围内的亚微米颗粒从悬浮液中分离出来。通过使用高分辨率方法分析收集的颗粒的尺寸和浓度来表征分离性能。对样品悬浮液进行 2.4 MHz 超声波照射，可以分离 90 至 320 nm 的特定尺寸颗粒，而无需考虑材料的类型。在SiO2悬浮液中添加少量非离子表面活性剂PONPE20增强了对更细颗粒的收集，并实现了收集颗粒数量的显着增加。样品悬浮液的脱气导致分离性能消失。悬浮液中溶解的空气在这种分离中起着重要作用。 (C) 2014 Elsevier B.V. 保留所有权利。
Aqueous suspensions containing silica or polystyrene latex were ultrasonically atomized for separating particles of a specific size. With the help of a fog involving fine liquid droplets with a narrow size distribution, submicron particles in a limited size-range were successfully separated from suspensions. Performance of the separation was characterized by analyzing the size and the concentration of collected particles with a high resolution method. Irradiation of 2.4 MHz ultrasound to sample suspensions allowed the separation of particles of specific size from 90 to 320 nm without regarding the type of material. Addition of a small amount of nonionic surfactant, PONPE20 to SiO2 suspensions enhanced the collection of finer particles, and achieved a remarkable increase in the number of collected particles. Degassing of the sample suspension resulted in eliminating the separation performance. Dissolved air in suspensions plays an important role in this separation. (C) 2014 Elsevier B.V. All rights reserved.