A NOVEL EMBEDDED BARRIER DESIGN AND THE EFFECT ON MIXING EFFICIENCY IN MICROFLUIDICS

• Main Authors: Hsiang-Yuan Yu, 游象元
• Other Authors: Che-Hung Wei
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/07312870060245485700

碩士 === 大同大學 === 機械工程學系(所) === 97 === In recent years, micro liquid system tends to be a trend of analyzing chemistry and life siences. Biochips brought attentions both on academia and business circles. According to different demands, by using extremely accurate technology, people use great deal of specific biological materials to place into biochips made of glass, Si, plastic or other macromolecule polymer in order, which can be used into variously biotic experiments and related purposes. Compared with traditional bio-technology, the analysis of biochip is rapid and it can be used with lower quantity of samples and dosages. Biochip can be used with a great deal of various samples. In micro system of integrated micro liquid technology, e.g. microfluidic transportation, metering, and mixing those are very important topics. For micro Liquid system, it must achieve rapid and effective mixture. We not only consider to its integration and simplify process but also to achieve the purpose of rapid mixture. Thus, we can easily realize that many scholars try to find out faster mixed method to enhance the efficiency of mixture. Passive micro-mixture machine only counts on geometric figure to achieve the mixed effect. It is different than proactive micro-mixture machine which counts on sonic, electricity, radiation and heat to meet mixed effect. However, these drive factors sometimes affect the reactive result of samples, and it takes even more complicated and difficult in processing course. This research is mainly to enhance the microfluidics of mixed efficiency by using self-design of passive novel embedded barrier. We used COMSOL software to do the numerical simulation by placing a novel embedded barrier and T-shape mixer to compare the mixing rates. Because of the effects of phenomena of nozzle, chaotic advection, and lateral convection comes from circle gap resistance, it makes the mixing efficiency by increasing barrier enhancing approximately 14.8-29.54% than T-shape mixer. We took high molecule materials into micro-mixing machine structure by using micro-electromechanical system (MEMS) to sep up experiment flat-top to observe the mixing behavior of micro liquid passing through circle gap novel embedded barrier and its mixing rate of actual operations to approve the exactly experiment figures. Also, we added up self-design circle gap novel embedded barrier assuring that it enhances the mixing rate of passive micro-liquid path.