Fabrication and characterization of polymethyl methacrylate microchannel using dry and underwater CO2 laser
| Autor: | Mohamed O. Helmy, Hassan El-Hofy, Ahmed R Fath El-Bab |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Microchannel
Materials science Fabrication Co2 laser 010401 analytical chemistry Nanotechnology 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Grey relational analysis 0104 chemical sciences Characterization (materials science) Taguchi methods Miniaturization General Materials Science Electrical and Electronic Engineering Underwater 0210 nano-technology |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems. 232:23-30 |
| ISSN: | 2397-7922 2397-7914 |
| DOI: | 10.1177/2397791417749700 |
| Popis: | Over the last few decades, miniaturization has become the key aspect of driving evolution of modern technology. The CO2 laser is an inexpensive, flexible, and fast device for fabricating microfluidic chips. Thermal damages associated with such a process are considered the big challenge for microfluidic device developers. This article evaluates the quality of polymethyl methacrylate microchannels fabricated by the CO2 laser. Experiments were conducted in the air (dry) and underwater by leaving a thin water layer on the top surface of the polymethyl methacrylate substrate. The effect of laser power and scanning speed on performance characteristics, such as the microchannel aspect ratio, surface roughness, and heat-affected zone was studied. Taguchi’s experimental design with grey relational analysis was used for multi-objective optimization of the laser micromachining parameters. Analysis of variance was also employed to determine the most significant control factors that affect the microchannel quality. The results indicated that the cooling effect of the underwater method has a significant effect on decreasing the extent of thermal damage while increasing the aspect ratio. Laser power is the most significant factor on the performance characteristics followed by scanning speed and pulse rate. Grey relational analysis is efficient in selecting the optimum conditions regarding the performance characteristics. |
| Databáze: | OpenAIRE |
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