3D-Printed Monolithic Chromatography Column
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Solution Overview
Problem
Conventional chromatography columns using particulate sorbents are limited in their ability to achieve efficient separation of substances, particularly in terms of peak symmetry and stability under varying solvent and temperature conditions, and there is a need for materials that can be produced using 3D printing for versatile solvent applications.
Innovation Solution
The development of chromatography columns comprising a porous monolithic sorbent and a casing made from thermoplastic polymers like PEEK or PPS, produced using 3D printing, which provide a bimodal or oligomodal pore distribution and are stable under pressure and solvent exposure, enabling effective chromatographic separation of multiple substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If particulate sorbents are used in conventional chromatography columns, then the sorbent bed can be filled tightly and particles distributed homogeneously, but separation performance and peak symmetry are limited
Solution Approach 1:
The patent employs a porous monolithic sorbent with a continuous porous structure instead of particulate sorbents. This monolithic structure provides superior separation performance and peak symmetry while maintaining structural integrity through its inherent porosity, resolving the contradiction between manufacturing precision and measurement precision.
Solution Approach 2:
The patent creates a composite structure by combining the porous monolithic sorbent with a casing made from thermoplastic polymer (PEEK or PPS) produced via 3D printing. This composite approach integrates the advantages of both materials: the monolithic sorbent provides excellent separation performance while the 3D-printed casing ensures structural stability and pressure resistance.
2Measurement precision
If monolithic sorbents are used to improve separation performance, then continuous 3D porous structures enable better chromatographic separation, but additional coating is required to ensure liquid-tight and pressure-stable operation
Solution Approach 1:
The patent merges the sorbent and casing into a single integrated component produced by 3D printing. The porous monolithic sorbent structure inherently provides both the separation functionality and the structural integrity, eliminating the need for separate coatings while maintaining pressure stability and liquid-tight operation.
Solution Approach 2:
The patent changes the material parameters by using thermoplastic polymers (PEEK or PPS) with high melting points and excellent chemical stability for the casing. This material selection provides inherent pressure stability and solvent resistance without requiring additional coating layers, thus reducing device complexity.
3Adaptability or versatility
If conventional materials are used for sample preparation, then plastic cartridges and stainless steel tubes are available, but they lack versatility for various organic and aqueous solvents at elevated temperatures
Solution Approach 1:
The patent achieves universality by selecting thermoplastic polymers (PEEK or PPS) that are compatible with a wide range of solvents including organic and aqueous systems. These materials maintain their mechanical and chemical properties across diverse solvent environments and temperature conditions, providing multi-functional adaptability.
Solution Approach 2:
The patent changes the thermal and chemical parameters of the casing material by using polymers with high melting points (above 150°C) and excellent chemical stability. This enables reliable operation under elevated temperatures and pressure while maintaining versatility across different solvent types.
4Adaptability or versatility
If 3D printing is used to produce monolithic sorbents, then versatile solvent applications and elevated temperature stability are achieved, but manufacturing precision and material selection are constrained
Solution Approach 1:
The patent uses composite materials approach by combining the porous monolithic sorbent structure with a thermoplastic polymer casing (PEEK or PPS) that is 3D printed. This composite structure leverages the advantages of both materials: the monolithic sorbent provides separation performance while the 3D-printed polymer casing ensures manufacturing feasibility, structural integrity, and chemical stability.
Solution Approach 2:
The patent changes the material parameters by selecting thermoplastic polymers with specific properties (high melting point above 150°C, chemical stability, pressure resistance) that are suitable for 3D printing processes. This material selection enables versatile solvent applications and elevated temperature stability while maintaining manufacturing precision through additive manufacturing.
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 columns demonstrate improved separation performance and stability, maintaining peak symmetry and efficiency even at elevated temperatures, with PEEK's high melting point ensuring durability and chemical stability for chromatographic separations.
Implementation Method 1
The invention relates to devices for material separation containing monolithic materials that can be produced using 3D printing... porous monolithic shaped bodies, which are used for chromatographic separation
Implementation Method 2
at least comprising a porous monolithic shaped body as a sorbent... substances to be separated is placed on a chromatography column according to the invention
Data Source
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AI summary
The invention relates to a device for substance separation with monolithic sorbents which can be produced by means of 3D printing. They are made of pressure- and solvent-stable thermoplastics.