Structure and Mechanism of Micropump Using Thermoresponsive Polymer Actuator.
Structure and Mechanism of Micropump Using Thermoresponsive Polymer Actuator.
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使用热响应聚合物执行器的微泵的结构和机理。
DOI：
10.1299/kikaic.58.1868
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
T. Hiramatsu
中科院分区：
文献类型：
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作者：
S. Hattori;T. Fukuda;R. Kishi;H. Ichijo;H. Katayama;H. Matsuura;T. Watarai;Shigenobu Nagamori;T. Hiramatsu
本文介绍了一种基于聚合物凝胶驱动系统的微型机械。与其他致动器相比，聚合物致动器具有许多优点。(1)它是柔性的，因为它是一种聚合物材料。(2)重量轻。(3)容易制作成任意形状。在聚合物凝胶致动器中，我们提出了一种使用热响应性聚合物凝胶的微泵。这种微泵由两个单向阀组成，利用高吸水率的聚合物凝胶作为阻塞球。该微泵样机的总体尺寸为直径8 mm，长度14.5 mm。它的重量为3.2g。聚合物凝胶驱动器是由聚乙烯基甲醚静态聚合物(PVME)组成的。该微泵的工作原理如下。(1)通过加热PVME，凝胶收缩。然后泵室的体积增加，导致液体从入口处流入到室中。(2)通过冷却PVME，凝胶在水中膨胀。然后泵室的体积减小，导致液体从泵室流向出口。(3)通过重复加热和冷却过程，微型泵提供从入口到出口的液体流动。对该微泵进行了测试，用电流代替镍铬丝加热，得到了满意的响应。
This paper deals with a kind of micromachine based on a polymer gel actuator system. The polymer actuator has many merits in comparison with other actuators. ( 1 ) It is flexible because it is a polymer material. ( 2 ) It is light in weight. ( 3 ) It is easy to make into an arbitrary shape. Among the polymer gel actuators, we propose a micropump using a thermoresponsive polymer gel. This micropump consists of two one-way valves which make use of a high-water-absorbing polymer gel as a blocking ball. The overall size of this micropump prototype is 8 mm in diameter and 14.5 mm in length. Its weight is 3.2 g. A polymer gel actuator is constituted of the poly (vinyl methyl ether) static polymer (PVME). The mechanism of this micropump is as follows. ( 1 ) By heating the PVME, the gel shrinks. Then the volume of the pump chamber increases, resulting in the inflow of liquid from the inlet to the chamber. ( 2 ) By cooling the PVME, the gel swells in the water. Then the volume of the pump chamber decreases resulting the liquid flow the chamber to the outlet. ( 3 ) By repeating the heating and cooling processes, the micropump provides liquid flow from the inlet to the outlet. The micropump was tested, replacing heating by a nichrome wire with electric current, and showed satisfactory responses.