材料科学
微尺度化学
电介质
分离压力
肺表面活性物质
电容
化学工程
双层
电压
高压
聚结(物理)
电流体力学
纳米技术
电场
光电子学
薄膜
膜
电气工程
电极
物理化学
数学
化学
遗传学
天体生物学
数学教育
量子力学
工程类
物理
生物
作者
Ingrid F. Guha,Kripa K. Varanasi
标识
DOI:10.1021/acsami.9b01477
摘要
Processes for separating oil–water mixtures are critical to operations in energy and water. However, existing separation methods pose efficiency limitations as well as environmental and safety challenges. Here, we present a low-voltage surface electrocoalescence approach that triggers coalescence of surfactant-stabilized emulsions by combining high-K dielectrics with surfactant bilayers. In this system, the high-K dielectric reduces the electrocoalescence voltage, while the surfactant bilayer functions as a self-healing, high capacitance film that prevents pinning of droplets on the dielectric surface. This high capacitance system maximizes the electric field between neighboring droplets, exerting high electrostatic pressure that overcomes the disjoining pressure between droplets, thereby enabling rapid electrocoalescence. We demonstrate electrocoalescence of surfactant-stabilized microscale droplets of saline water in oil using single volts. We expect our results may find application in the energy sector, wastewater treatment, and purification industries.
科研通智能强力驱动
Strongly Powered by AbleSci AI