Easy Demonstration of the Marangoni Effect by Prolonged and Directional Motion: "Soap Boat 2.0"
Easy Demonstration of the Marangoni Effect by Prolonged and Directional Motion: "Soap Boat 2.0"
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DOI：
10.1021/ed400316a
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发表时间：
2013-10-01
影响因子：
3
通讯作者：
Mooibroek, Tiddo Jonathan
中科院分区：
文献类型：
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作者：
Renney, Charles;Brewer, Ashley;Mooibroek, Tiddo Jonathan
所谓的“肥皂船”已为人所知数十年，可用于演示马兰戈尼效应。受最近科学工作的启发，本文报告了一种改进的演示：“肥皂船 2.0”。通过此演示，漂浮物体（通常是聚苯乙烯泡沫）可以沿着水面推进长达几分钟。运动方向（直线、左旋或右旋）可能会受到船只设计的影响。提出了三种易于制造且有效的船只设计，并在安全性、有效性、持续时间、易用性和可用性方面考虑了十五种“燃料”。还提出了演示的一些其他可能的变化。该演示可以针对任何年龄段的人进行，持续时间长达几分钟，并且可以变成不同长度的学生项目。可以使用现成的材料（例如，聚苯乙烯泡沫）和良性家用化学品（例如，>= 10% 2-丙醇（“外用酒精”）水溶液）。
So-called "soap boats" have been known for decades and can be used to demonstrate the Marangoni effect. Inspired by recent scientific work, this paper reports an improved demonstration: a "soap boat 2.0". With this demonstration, a floating object (typically polystyrene foam) can be propelled along the water surface for up to several minutes. The direction of motion (straight, left-handed, or right-handed circles) can be influenced by the boat design. Three easy-to-make and effective boat designs are presented, and fifteen "fuels" have been considered with regard to safety, effectiveness, duration, ease of use, and availability. Some Other possible variations of the demonstration are also proposed. The demonstration can be done with any age group, lasts for up to several minutes, and can be turned into a student project of varying length. Readily available materials (e.g., polystyrene foam) and benign household chemicals (e.g., >= 10% 2-propanol ("rubbing alcohol") in water) can be used.