Ouzo column under impact: formation of emulsion jet and oil-lubricated droplet
Ouzo column under impact: formation of emulsion jet and oil-lubricated droplet
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碰撞下的茴香柱：形成乳液射流和油润滑的液滴
DOI：
10.1021/acs.langmuir.0c01692
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发表时间：
2021
期刊：
影响因子：
3.9
通讯作者：
X.
中科院分区：
文献类型：
--
作者：
Kamamoto;K.;Kiyama;A.;Tagawa;Y.;and Zhang;X.
我们研究了由OZO乳状液组成的液柱在液体容器落在坚硬地面上时所产生的冲击下的动力学。在空化数为0.36，预计会发生空化的情况下，我们的高速摄像捕捉到了流动的射流和空化气泡，而不同冲击次数后OZO中的石油微滴则通过光学显微镜可视化。重要的是，对OZO柱的冲击可以喷射乳状液的聚焦射流，并在固体衬底上沉积少量乳状液。正如我们的静态摄影所显示的那样，沉积的乳状液立即形成了一个由油润滑的液滴。我们的发现对喷墨应用具有重要意义，例如喷墨打印乳剂或快速沉积用于组装超微粒的自润滑液滴。并从油滴存在的角度讨论了射流的形成机理。
We investigated the dynamics of a liquid column consisting of ouzo emulsion under the impact generated when the liquid container lands on a hard ground. At a cavitation number of 0.36, where cavitation is expected to occur, our high-speed videography captured the traveling jet and cavitation bubbles while the oil microdroplets in ouzo after different runs of impact were visualized by an optical microscope. Importantly, the impact on an ouzo column can eject a focused jet of the emulsion and deposit a small volume of emulsion on a solid substrate. As revealed by our still photography, the deposited emulsion formed an oil-lubricated drop immediately. Our findings have implications for jetting applications such as inkjet printing of emulsions or fast deposition of self-lubricating drops for assembling supraparticles. We also discuss the jet formation mechanism in terms of the existence of oil microdroplets.