高校化学工程学报Issue(6)：1333-1339,7.DOI:10.3969/j.issn.1003-9015.2015.06.008
高频高压脉冲电场作用下水链形成与消散行为的实验研究1
The Experimental Study of Water Chain Formation and Dissipation in High-Frequency and High-Voltage Pulsed Electric Field
摘要
Abstract
In order toinvestigate the mechanism of water chains’ formation and dissipation during the process of electric coalescence in oil further, micro-experiment was carried out to study the patterns of water chains’ formation and dissipation in high-frequency and high-voltage pulsed electric field. There are two patterns of water chains’ formation in W/O emulsions under experimental conditions. Due to the high polarization force in high electricfield, the single droplet breaks up in the middle part to form water chains with length of more than 1000mm. In addition, the membrane of droplets can be broken-down by electrostaticforce in high-frequency and high-voltage pulsed electric field and coalesces to water chains with length of around 268μm. There are also two patterns of water chains’ dissipation in W/O emulsions. Water chains’ own droplets are polarized in high-frequency and high-voltage pulsed electric field, and coalesce when electrostatic stress is higher than interfacial tension. The water chain with length of 51μm and average diameter of 8.8μm coalesces to a 16μm droplet, while the water chain with length of 204μm and average diameter of 20μm coalesces to a water chain with length of 68μm and average diameter of 33μm. When outside droplets touch with droplets of water chains’ end, the charge neutralization occurs, and the charge distribution changes, which leads to water chains’ coalescence dissipation. The outside droplet with diameter of 26μm coalesces with the water chain with length of 37μm and average diameter of 9.3μm to a 30μm droplet, while the outside droplet with diameter of 35μm coalesces with the water chain with length of 259μm and average diameter of 39μm to a water chain with length of 210μm and average diameter of 50μm.关键词
高频高压/W/O乳状液/水链形成方式/水链消散方式Key words
high-frequency and high-voltage/W/O emulsions/pattern of water chain formation/pattern of water chain dissipation分类
化学化工引用本文复制引用
李彬,孙治谦,王振波,金有海..高频高压脉冲电场作用下水链形成与消散行为的实验研究1[J].高校化学工程学报,2015,(6):1333-1339,7.基金项目
国家自然科学基金(21406267)；山东省自然科学基金(ZR2014BL029)；中国石油大学(华东)研究生创新工程资助项目(YCX2014019)。 （21406267）
