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Low-Cost Microreactor Development By Ali Alhamadah, Alex Najdek, and Michael Ong

Low-Cost Microreactor Development By Ali Alhamadah, Alex Najdek, and Michael Ong Oregon State University School of Chemical, Biological, and Environmental Engineering. Screenprinting. Expose photo emulsion. What is a microreactor ?. Etch slide in NH 4 HF 2. Create patterns on transparency.

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Low-Cost Microreactor Development By Ali Alhamadah, Alex Najdek, and Michael Ong

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  1. Low-Cost Microreactor Development By Ali Alhamadah, Alex Najdek, and Michael Ong Oregon State University School of Chemical, Biological, and Environmental Engineering Screenprinting Expose photo emulsion What is a microreactor? Etch slide in NH4HF2 Create patterns on transparency Screenprint gloss enamel paint Patterns A reactor with flow channel dimensions less than 1 millimeter, also called microchannels. Microchannels provide stability to reactions which are unstable at normal conditions, making many chemical processes cheaper and safer. Developing a low-cost fabrication procedure would provide students more learning opportunities with reactors. Test reactor with conductivity probe Drill interconnects in cover slip Bond slides using calcium assisted technique Epoxy luer lock interconnects Microreactor Development Squeegee Screenprinter (Yudu) • Create patterns using Diazo photo • emulsion Instead of Yudu sheets. • Curing time of 6 min. • Technique is key! Goals • Develop a process to manufacture low-cost microreactors. • Investigate different methods and materials for creating high-resolution microchannels. • Final cost of no more than $8.00 per reactor. Bonding Slides bonded using calcium assisted technique. Calcium creates a bridge between the glass slides. Mixing Junction Etched Micro Channel Outlet Microscope Slide Chemical Injection Site Masks • Drilling and Interconnects • Holes drilled using two drill bits • - 1/16” tungsten carbide and 3/16” diamond • tipped • Constant drip of water over slides during drilling to prevent shearing. • Epoxy luer locks into place. • References • Cong, H., Pan, T., Photopatternable Conductive PDMS Materials for Microfabrication, Advanced Functional and Materials • Varin et al. Exploration of low-cost implementation of reactive systems in microreactors. Oregon State University. 2009. Acknowledgements We would like to thank Dr. Alex Yokochi and Dr. Phil Harding for their guidance. We would also like to thank Nicholas Au Yeung, Alex Bistrika, Kevin Caple, Andy Brickman and Manfred Dittrich for their help.

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