Can bulk nanobubbles be stabilized by electrostatic interaction?
Can bulk nanobubbles be stabilized by electrostatic interaction?
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DOI：
10.1039/d1cp01279g
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发表时间：
2021-07
期刊：
影响因子：
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通讯作者：
Shuo Wang;Limin Zhou;Yongxiang Gao
中科院分区：
文献类型：
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作者：
Shuo Wang;Limin Zhou;Yongxiang Gao
有人提出，由纳米气泡表面积累的电荷引起的静电应力可能平衡拉普拉斯压力，从而导致其稳定性。在过去的十年里，这种机制在纳米气泡领域得到了广泛的讨论。然而，以往的理论在计算静电效应时忽略了扩散双层中的应力。在本文中，我们使用经典双层理论重新计算了这种效应。结合实验测量的zeta电位，我们发现静电压力与拉普拉斯压力的比值远小于10-2，这表明静电相互作用可能不是稳定大块纳米气泡的主要因素。
It has been suggested that electrostatic stress arising from charges accumulated at the surface of nanobubbles might balance Laplace pressure leading to their stability. This mechanism has been widely discussed in the nanobubble field for the past decade. However, the stress in the diffusive double layer was overlooked when calculating the electrostatic effect in previous theories. In this communication, we recalculated this effect using the classical double layer theory. Combined with experimentally measured zeta potential, we find that the ratio of electrostatic pressure to Laplace pressure is much less than 10-2, which suggests that electrostatic interaction may not be the main factor for stabilizing bulk nanobubbles.