Unexpected water flow through Nafion-tube punctures.
Unexpected water flow through Nafion-tube punctures.
复制标题
意外的水流穿过Nafion管穿刺。
DOI：
10.1103/physreve.83.056305
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发表时间：
2011-05
期刊：
影响因子：
--
通讯作者：
Pollack GH
中科院分区：
文献类型：
--
作者：
O'Rourke C;Klyuzhin I;Park JS;Pollack GH
当一根Nafion管浸入水中，在管壁上打一个小孔时，会发生意想不到的现象：水通过小孔不断流入管中。这一现象已被证明是可重复的，因此对动态方面进行了探索，包括改变pH值和引入第二个空穴的影响。看来，流动是密切联系到最近发现的“禁区”，形成一个环形内的全氟磺酸管。这些区域在管的核心产生质子，质子对质子施加压力;一旦穿孔，通过孔吸水来释放压力。这一假说与实验结果相一致，并可能与树木的水分运输机制有关。
When a Nafion tube is immersed in water and a small hole is punched in the tube’s wall, an unexpected phenomenon occurs: Water flows continuously into the tube through the hole. The phenomenon has proved repeatable, and dynamic aspects were therefore explored, including the effects of altered pH and introduction of a second hole. It appears that the flow is closely tied to the recently discovered “exclusion zone” that forms as an annulus inside the Nafion tube. These zones generate protons in the core of the tube, which exert pressure on the menisci; once a hole is punched, the pressure is relieved by sucking water through the hole. This hypothesis is consistent with the observed experimental evidence and may be relevant to the mechanism of water transport in trees.