Process Study on 3D Printing of Polymethyl Methacrylate Microfluidic Chips for Chemical Engineering

Area of Science:

• Microfluidics
• Materials Science
• Chemical Engineering

Background:

• Microfluidic technology utilizes micropipes for fluid manipulation across various scientific disciplines.
• Three-dimensional (3D) printing, particularly fused deposition modeling (FDM), offers rapid and cost-effective prototyping for microfluidic devices.
• Polymethyl-methacrylate (PMMA) is a versatile thermoplastic material widely used in microfluidic applications.

Purpose of the Study:

• To investigate the fabrication process of FDM 3D-printed PMMA microfluidic chips.
• To optimize printing parameters for enhanced microchannel quality and performance.
• To demonstrate the application of 3D-printed microreactors in chemical reactions.

Main Methods:

• Finite element numerical analysis to model thermal stress and identify critical printing parameters.
• Orthogonal experimental design for systematic optimization of FDM printing parameters.
• Fabrication of PMMA microfluidic chips using a single printing molding technique.
• Performance evaluation through chemical reaction experiments and surface roughness analysis.

Main Results:

• Printing platform temperature identified as crucial for preventing warping and delamination.
• Successful fabrication of microfluidic chips with 200 μm square microchannels, free from clogging or leakage.
• Optimized printing parameters achieved a microchannel surface roughness of Ra 1.077 μm.
• Demonstrated successful application of 3D-printed microreactors for copper ion and ammonium hydroxide reactions.

Conclusions:

• FDM 3D printing is a viable and cost-effective method for producing high-quality PMMA microfluidic chips.
• Optimized printing processes lead to improved microchannel characteristics and device performance.
• 3D-printed microreactors offer a promising platform for chemical synthesis and analysis, including water quality detection.