指導教授：陳立仁臺灣大學：化學工程學研究所黃彥龍Huang, Yen-LungYen-LungHuang2014-11-252018-06-282014-11-252018-06-282014http://ntur.lib.ntu.edu.tw//handle/246246/261153本研究主要分成三部分，第一部分探討水與甘油於兩分離平板間的液體輸送現象，第二部分探討高分子溶液於兩分離平板間的液體輸送現象，第三部分探討高分子溶液在微米尺度下的凹板轉印(gravure offset printing)情形。 在第一部分，我們使用三種不同的表面做為平板，利用光學系統紀錄水與甘油在不同分離平板系統中的液體輸送現象。研究初期先以較慢的平板分離速度進行實驗，並利用Surface Evolver以及FLOW-3D兩套模擬軟體與實驗的結果作比對，之後改變平板的分離速度以了解平板分離速度對轉印系統的影響。我們發現後退角在轉印系統中扮演重要的角色，此外，平板分離速度亦會對接觸角、液體轉移率等造成影響。 第二部分我們利用光學系統紀錄液體在不同分離平板系統中的液體輸送現象，不過在液體中添加了高分子以及界面活性劑以模擬用於電子印刷中的銀膠，由於銀膠通常固含量高導致黏度高且需要添加分散劑使其均勻分散。高分子與界面活性劑的添加改變液體的黏度以及在固體表面上的濕潤性，並從實驗結果得知溶液的黏度與在固體表面上的濕潤性都對兩平板間的液體轉印行為有極大的影響。 在第三部分中，我們使用添加不同界面活性劑含量的高分子溶液進行微米尺度下的凹板印刷，結果顯示界面活性劑的含量的確會影響印刷品質，此外我們發現實驗環境的溫度與濕度變化亦會對我們的系統造成不可忽視的影響。Three topics are discussed in this study: the liquid transfer phenomenon of water and glycerol between two plates, the liquid transfer phenomenon of polymer solution between two plates and micro-scale gravure offset printing with polymer solution. First, we used three different surfaces as plates and utilized the enhanced video-microscopy system to observe the liquid transfer phenomenon. We started with slow plate separation velocity for the experiment and adapted the Surface Evolver and FLOW-3D to verify our experiment results. Then we changed the plate velocity to understand the plate velocity effect on the liquid transfer system. According to the experiment, it is found that receding contact angle is crucial and the plate velocity influences contact angle behavior, liquid transfer rate and so on. Second, to emulate the silver ink used in printing electronics, we added polymer and surfactant to the sample liquid because the silver ink is usually with high solid-content. High solid-content leads to that the ink is highly viscous and dispersant is necessary to make the ink homogeneous. With polymer and surfactant added, the viscosity and wettability of sample liquid are changed and the changes have significant effect on the liquid transfer phenomenon. In the third part, we used polymer solutions with different surfactant concentrations as ink, conducting the micro-scale gravure offset printing. The results show that the surfactant concentration affects the printing quality. In addition, the influence of ambient condition such as temperature and humidity cannot be ignored for our system.TABLE OF CONTENTS 誌謝 i 摘要 ii ABSTRACT iii TABLE OF CONTENTS v LIST OF TABLES viii LIST OF FIGURES ix CHAPTER 1. INTRODUCTION 1 CHAPTER 2. LITERATURE REVIEW 4 2.1 Contact Angle and Surface Energy 4 2.1.1 Young’s Equation 4 2.1.2 Advancing Contact angle and Receding Contact Angle 5 2.1.3 Surface Energy 5 2.2 Gravure Offset Printing 6 2.2.1 Printing Speed Transformation 7 2.2.2 Contact Angle Effect on Gravure Offset Printing 8 CHAPTER 3. EXPERIMENTAL METHOD 11 3.1 Materials 11 3.2 Experimental Apparatuses 12 3.3 Experimental Procedure 12 3.3.1 Sample Preparation 12 3.3.2 Advancing / Receding Contact Angle Measurement 13 3.3.3 Plate-to-Plate Liquid Transfer 13 3.3.4 Plate-to-Plate Polymer Solution Transfer 14 3.3.5 Gravure Offset Printing 15 3.3.6 Cavity-to-Plate Liquid Transfer 16 CHAPTER 4. COMPUTATIONAL CALCULATION 23 4.1 Simulation by the Surface Evolver 23 4.2 Simulation by FLOW-3D 25 CHAPTER 5. RESULTS AND DISCUSSION – PLATE-TO-PLATE LIQUID TRANSFER….... 29 5.1 Contact Angle Behavior of the Plate-to-Plate Liquid Transfer 29 5.2 Receding Contact Angle Effect on the Transfer Rate 30 5.3 Plate Velocity Effect on the Plat-to-Plate Liquid Transfer 31 CHAPTER 6. RESULTS AND DISCUSSION – PLATE-TO-PLATE POLYMER SOLUTION TRANSFER 41 6.1 Surfactant Effect on the Contact Angle and Transfer Rate 42 6.2 Plate Velocity and Ink Viscosity Effect on the Plate-to-Plate Polymer Solution Transfer 43 CHAPTER 7. RESULTS AND DISCUSSION – GRAVURE OFFSET PRINTING 80 7.1 Contact Angle Effect on the Gravure Offset Printing 80 7.2 Ambient Influence on the Gravure Offset Printing 81 7.3 Evaporation Effect on the Gravure Offset Printing 82 7.4 Cell Geometry Effect on the Gravure Offset Printing 83 CHAPTER 8. CONCLUSION 97 REFERENCES 99 APPENDIX 1036400079 bytesapplication/pdf論文公開時間：2019/08/16論文使用權限：同意有償授權(權利金給回饋學校)凹板轉印液體輸送接觸角後退角液體轉移率高分子溶液thesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/261153/1/ntu-103-R01524072-1.pdf