||Development of a biomimetic micropump with blood-sucking mechanism of mosquitoes
||Department of Aeronautics & Astronautics
本研究利用蚊子吸血機制，發展出新型仿生型微幫浦可與蚊子吸血效率一樣高達36%。此微幫浦用微機電技術製作而成，主要使用PDMS與玻璃製造微管道晶片，並使用Fe-PDMS作為致動薄膜，再使用Nd-FeB磁鐵與壓電片驅動Fe-PDMS薄膜，配合最佳化致動波型產生淨流量。本文首先利用Lump mode理論配合田口法，並配合數值模擬研究此微幫浦，目的是改良蚊子口器尺寸並找到最佳化的波型，而Lump modl理論值與數值模擬僅能在完全發展流場互相符合，但是理論所設計的尺寸仍可用於實驗。本文實驗的方式除了使用理論設計的尺寸，也配合田口法與不對稱致動找出最佳波型，實驗結果顯示，最大流量23.5 μL/min且效率可達86%，幫浦的背壓可達2.9 kPa。
This study presents a novel bionic micropump, which mimics blood-suck mechanism of mosquitos with a similar high efficiency of 36%. This micropump is produced by using Micro-Electro-Mechanical System (MEMS) technology, PDMS (polydimethylsiloxane) to fabricate the micro channel, and the actuator membrane made by Fe-PDMS. The micropump employs an Nd-FeB permanent magnet and PZT to actuate the Fe-PDMS membrane to generate flow rate. Lumped model theory and Taguchi method are used for numerical simulation of fully developed flow in the micropump. Also focused in this study is to change the size of mosquito mouth to identify the best waveform for transient flow. The results can be used for the experimental verification. In addition to using theoretical design of the channel size, also combine with Taguchi method and asymmetric actuation to find the optimization actuation waveform, according to the experimental result, the maximum pumping flowrate is 23.5 μL/min and efficiency is 86%, moreover, the back pressure can achieve 2.9 kPa.
LIST OF TABLES XI
LIST OF FIGURES XII
CHAPTER Ⅰ 1
1.1 Review of Micropumps 2
1.2 Mechanism of Mosquitoes 4
1.3 Application of mosquito blood sucking mechanism 6
1.4 Motivation and purpose 8
CHAPTER Ⅱ 24
Theoretical and Numerical simulation of the micropump 24
2.1 Lump model analysis 24
2.2 Numerical simulation analysis 30
2.3 The comparison between numerical simulation and Lump model 37
2.4 The pulsating flow field from PP to outlet 39
CHAPTER Ⅲ 71
Experimental Process and Setup 71
3.1 Photolithography processes 71
3.2 Fe-PDMS and PDMS fabrication procedures 74
3.3 Experimental setup 75
CHAPTER Ⅳ 89
Experimental Results and Discussion 89
4.1 The effect of magnet position 89
4.2 The Effect of Bp on Flowrate 91
4.3 The Flow Visualization and Membrane Deformation of Micropump 92
CHAPTER Ⅴ 117
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