Mechanically adjustable chemostats based on stimuli-responsive polymers
Mechanically adjustable chemostats based on stimuli-responsive polymers
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DOI：
10.1016/j.snb.2007.03.002
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发表时间：
2007-08-08
影响因子：
8.4
通讯作者：
Kretschmer, Katja
中科院分区：
文献类型：
--
作者：
Richter, Andreas;Wenzel, Jan;Kretschmer, Katja
已经开发了用于进行闭环控制的基于水凝胶的装置的机械操作点调节的方法。这些所谓的恒化器自动控制液体的某些化学和能量条件。控制条件的调节通过装置的激活单元和确定基本函数关系的水凝胶致动器的触发点的限定变化来提供。介绍了自动阀式恒化器的对抗原理，该恒化器可交替实现常开和常闭功能。使用水凝胶聚（N-异丙基丙烯酰胺），恒化器的水溶液中乙醇的切换浓度可以在5和20重量%的范围内调节。具有1重量%的实际相关精度。以过程温度控制为例，研究了恒化器在能量控制条件下的可控性。我们发现，这个温度可以在25和35摄氏度的范围内进行机械调节，标准偏差低于0.75 K。(c)2007 Elsevier B. V.保留所有权利。
A method for a mechanical operating point adjustment of hydrogel-based devices performing closed loop control has been developed. These so-called chemostats automatically control certain chemical and energy-based conditions of a liquid. The adjustment of the controlled condition is provided by a defined change of the triggering point by the activation unit of the device and the hydrogel actuator determining the basic functional relationship. The antagonistic principles of automatic valve chemostats were introduced, which can alternatively realize a normally open or a normally closed function. Using the hydrogel poly(N-isopropylacrylamide) the chemostat's switching concentration of ethanol in aqueous solution can be adjusted in the range of 5 and 20 wt.% with a practically relevant precision of I wt.%. The controllability of an energy-based condition by the chemostat was investigated on the process temperature control. We found that this temperature can be mechanically adjusted in a range of 25 and 35 degrees C with a standard deviation below 0.75 K. (c) 2007 Elsevier B.V. All rights reserved.