3D-Printed Static Mixer Assembly for HPLC Solvent Homogeneity
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Solution Overview
Problem
Conventional static mixer assemblies in high-performance liquid chromatography (HPLC) suffer from incomplete solvent mixing, leading to degradation of chromatograms and poor peak shapes due to interactions with wetted materials, which affect the accuracy of downstream detectors.
Innovation Solution
The static mixer assemblies are fabricated using additive manufacturing (3D printing) with a unique design featuring a mixer body with internal grid members that create longitudinal mixing channels and transverse openings, enhancing fluid mixing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional static mixer assemblies are used in HPLC applications, then the mixing function is provided, but incomplete solvent mixing occurs leading to degradation of chromatograms and poor peak shapes
Solution Approach 1:
The mixer body is segmented into multiple internal mixing sections with grid members that divide the fluid stream into multiple pathways. Each grid member creates separate channels that force sequential mixing, ensuring complete solvent mixing and eliminating baseline noise in HPLC applications
Solution Approach 2:
The wetted path materials are specifically selected to be inert (PEEK, PFA, or PVDF) at the locations where fluid contact occurs. This local application of inert materials prevents sample interaction and binding at critical mixing zones, ensuring accurate chromatographic results
2Reliability
If conventional static mixer assemblies are used, then mixing is provided, but interactions with wetted path materials occur affecting sample accuracy
Solution Approach 1:
The mixer body and internal components are constructed from inert materials (PEEK, PFA, or PVDF) that do not interact with or bind to the sample. This creates a chemically inert environment throughout the fluid path, preventing sample degradation and ensuring accurate detector readings in HPLC applications
3Adaptability or versatility
If 3D printing is used to fabricate mixer bodies, then design flexibility and mixing efficiency are improved, but pressure resistance requirements must be met
Solution Approach 1:
The mixer body wall thickness and internal geometry are optimized through 3D printing parameters to withstand high HPLC pressures (up to 1500 bar). The additive manufacturing process allows precise control of structural parameters while maintaining design flexibility for various mixing configurations
Solution Approach 2:
The mixer assembly combines 3D-printed PEEK mixer bodies with inert coating materials (PEEK, PFA, or PVDF) to achieve both structural integrity for pressure resistance and chemical inertness for sample accuracy
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The 3D printed mixer assemblies achieve thorough mixing of fluids, reducing baseline noise and improving peak shapes in HPLC processes, with pressure ratings exceeding 1200 bar and mixing efficiency ranging from 80 to 85%.
Implementation Method 1
fabricated at least in part by additive manufacturing (e.g., via a 3D printing process, such as, for example, via a fused deposition modeling ('FDM') process)
Data Source
AI summary
Disclosed herein are static mixer assemblies, and related methods of fabrication and use. The disclosure provides advantageous static mixer assemblies, and improved systems/methods for utilizing and/or fabricating the static mixer assemblies. The disclosure provides static mixer assemblies fabricated at least in part by additive manufacturing (e.g., via a 3D printing process, such as, for example, via a fused deposition modeling (“FDM”) process), and related methods of use. The static mixer assemblies of the present disclosure can be particularly well-suited for applications such as, without limitation, high performance liquid chromatography (“HPLC”) applications. The additive manufacturing or 3D printing processes (e.g., FDM or LAMT techniques) as described herein can be used to manufacture static mixer assemblies with complex shapes/designs (e.g., and that are highly effective yet small in shape).