本文選題：微反應器 + 壓電微泵��； 參考：《吉林大學》2015年碩士論文

【摘要】：本文提出一種基于PDMS的集成式壓電驅動微流體反應器，它將壓電微泵、微混合流道、微反應流道集成在同一塊PDMS基片上，利用該反應器可實現多種主動混合模式，克服了目前主動微流體反應器存在的不足，提高了微尺度下流體的混合效果和速率，充分發(fā)揮了主動式微流體反應器混合高效的特點。它是一種主動性更強、過程可控的新型主動式微流體反應器，特別是在貴金屬納米粒子(比如金、銀、鉑等)的合成方面具有更大的優(yōu)勢。具體研究內容如下： 分析探究了將壓電微泵集成在微流體反應器芯片上的可行性，利用制作微流體反應器芯片的工藝和材料（PDMS）制作了微泵泵體，并對完成整機裝配后的壓電微泵進行了工作性能測試，實驗證實自制基于PDMS的壓電微泵具有良好的工作性能，，其不僅能夠輸送像水這樣粘度比較低的液體，對于粘度較高的流體（如氯金酸等化學反應溶液）也有較好的輸送性能。 對微反應器的微混合流道進行了Fluent流體仿真分析計算，并將其仿真計算結果輸出數據文件和工程文件，工程文件導入Tecplot進行后處理得到混合流道組分濃度分布圖，數據文件導入MATLAB進行混合度值的計算，以綜合評價不同參數條件下的混合效果，優(yōu)選出了最佳結構參數和工作參數，以對微反應器的制作和后期實驗參數的設定提供依據。 根據優(yōu)選出的微流道結構參數和壓電微泵輸出性能對微反應器各芯片進行了集成化結構設計，在傳統(tǒng)微流控芯片制作工藝的基礎上研究并設計了其制作工藝，最后制得整機尺寸為40mm×40mm×4mm的微反應器各芯片（雙腔微泵驅動下微混合芯片的為50mm×50mm×6mm），做到了微反應器的集成化、微型化、便攜化。 用本文作者自制的微流體反應器進行了金納米粒子的液相合成實驗，驗證了自制微流體反應器的工作性能，證明了其在貴金屬納米粒子可控合成等復雜化學反應中的應用優(yōu)勢。實驗證明調節(jié)壓電微泵的入口流量和工作頻率會對金納米粒子的大小、形貌產生影響，證明了本文自制微流體反應器在可控合成金納米粒子方面的可行性及優(yōu)勢。調節(jié)微泵電壓為20V、30V、40V，工作頻率為100Hz、200Hz、300Hz，可合成粒徑范圍大致從20nm到70nm之間的球狀、類球狀的金納米粒子。實驗證明：除了微泵工作參數外的其他因素（如是否加入CTAB、還原劑檸檬酸鈉的濃度等）也會對所合成的金納米粒子的形貌產生影響，所以下一步需要對溶液酸堿度、溫度等微泵工作參數外的影響因素進行實驗探究，以得出其最佳匹配值，從而更好的利用本文自制的微流體反應器進行納米粒子的 可控‖合成。
[Abstract]:In this paper, an integrated piezoelectric driven micro fluid reactor based on PDMS is proposed. It integrates piezoelectric micropump, micro mixing channel and micro reaction channel on the same PDMS substrate. It overcomes the shortcomings of active microfluid reactor at present, improves the mixing effect and rate of micro-fluid in micro-scale, and gives full play to the characteristics of active micro-fluid reactor mixing efficiency. It is a new type of active microfluid reactor with more initiative and controllable process, especially in the synthesis of noble metal nanoparticles (such as gold, silver, platinum, etc.). The specific research contents are as follows: the feasibility of integrating piezoelectric micropump into microfluidic reactor chip is analyzed, and the micropump body is made by using the technology and material (PDMS) of microfluidic reactor chip. The experimental results show that the self-made piezoelectric micropump based on PDMS not only can transport liquid with lower viscosity as water, but also has good performance. For high viscosity fluids (such as chloro-gold acid and other chemical reaction solutions) also has a better transport performance. The fluent fluid simulation analysis was carried out on the micro mixing channel of the microreactor, and the simulation results were output data file and engineering file, and the engineering files were imported into Tecplot for post-processing to obtain the mixture flow channel component concentration distribution diagram. The data file was imported into MATLAB to calculate the mixing degree value, to evaluate the mixing effect under different parameters, and to select the best structure parameters and working parameters, so as to provide the basis for the fabrication of microreactor and the setting of later experiment parameters. Based on the optimized structure parameters of microchannel and the output performance of piezoelectric micropump, the integrated structure of microreactor chips is designed. Based on the traditional microfluidic chip fabrication technology, the fabrication process is studied and designed. Finally, the microreactor chips with the size of 40mm 脳 40mm 脳 4mm (50mm 脳 50mm 脳 6mm) driven by dual-chamber micropump are fabricated. The microreactor is integrated, miniaturized and portable. In this paper, the liquid phase synthesis experiments of gold nanoparticles were carried out in a self-made microfluid reactor. The performance of the self-made micro-fluid reactor was verified, and the advantages of its application in complex chemical reactions such as controllable synthesis of noble metal nanoparticles were proved. It is proved that adjusting the inlet flow rate and working frequency of piezoelectric micropump will affect the size and morphology of gold nanoparticles. The feasibility and advantage of the self-made micro-fluid reactor in the controllable synthesis of gold nanoparticles are proved. The micropump voltage is 20V ~ 30V ~ (-1) 40 V and the working frequency is 100Hz ~ 200Hz ~ (300) Hz. The spherical, globular gold nanoparticles with particle size ranging from 20nm to 70nm can be synthesized. The experimental results show that other factors, such as the addition of CTAB, the concentration of sodium citrate and so on, will also affect the morphology of the gold nanoparticles, so the next step is to determine the pH of the solution. In order to obtain the best matching value, the factors that affect the working parameters of micropump such as temperature are investigated in order to make better use of the micro-fluid reactor made in this paper for the synthesis of nano-particles.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ052

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