Flow-Through Ligand Coupling for Chromatographic Membranes
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Solution Overview
Problem
Chemical modification of membranes for ligand coupling is challenging due to the need for slow reaction kinetics, which limits the efficiency and scalability of affinity media modification processes.
Innovation Solution
A method involving a functionalized composite material with a macroporous cross-linked gel, arranged in a coplanar stack, tubular, or spiral wound configuration, where a ligand solution is flowed through or across to form covalent bonds with pendant reactive functional groups, enhancing ligand coupling and binding capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If roll-to-roll membrane modification process is used, then the membrane can be physically moved through reaction solution, but the reaction time becomes extremely long and processing efficiency decreases
Solution Approach 1:
Instead of moving the membrane through the reaction solution (roll-to-roll), the invention inverts the approach by flowing the reaction solution through the stationary membrane assembly. This allows the membrane to remain in place while reagents are delivered efficiently through the porous structure, dramatically reducing reaction time from hours to minutes while maintaining complete ligand coupling.
Solution Approach 2:
The invention employs hydraulic flow of reaction solutions through the membrane assembly at controlled flow rates. This hydraulic delivery system ensures efficient reagent penetration into the porous membrane structure, enabling complete ligand coupling in minutes rather than the hours required by roll-to-roll methods.
2Reliability
If slower movement of membrane through reaction solution is used, then ligand coupling can be complete, but processing time increases significantly
Solution Approach 1:
The hydraulic flow system delivers reagents directly through the membrane pores at optimized flow rates, ensuring complete ligand coupling occurs rapidly. The flow-through configuration maintains high reagent concentration at the reaction sites throughout the membrane, achieving complete coupling in minutes rather than hours.
Solution Approach 2:
The membrane is pre-functionalized with reactive groups before ligand coupling, and the flow-through system is pre-configured with optimized reagent concentrations and flow rates. This preliminary preparation enables the actual ligand coupling reaction to proceed to completion very rapidly when the reagents are introduced.
3Stability of the object's composition
If membrane is supported during modification, then membrane structure is protected, but diffusion of reagents into membrane is limited
Solution Approach 1:
The membrane assembly is segmented into multiple layers including porous support layers and active membrane layers with interconnected pore structures. This segmentation allows reagents to diffuse efficiently through the porous support structure while the membrane remains mechanically supported and protected throughout the modification process.
Solution Approach 2:
The invention utilizes porous support structures with controlled pore sizes and distributions that facilitate reagent diffusion while providing mechanical support to the membrane. The porous architecture allows reagents to penetrate deep into the membrane structure without compromising membrane integrity, enabling efficient ligand coupling throughout the entire membrane volume.
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
This method increases the dynamic binding capacity of affinity membranes, enabling rapid and productive chromatographic purification operations with improved ligand coupling efficiency compared to batch methods.
Implementation Method 1
a plurality of covalent bonds forms between the reactive functional groups and the first ligands
Data Source
AI summary
Disclosed are methods for coupling a ligand to a composite material. Covalent bonds are formed between functionalized composite materials and ligands as a ligand solution flows through or across the composite materials. The composite materials are useful as chromatographic separation media.