Chromatography Packing Material Reducing Pressure Drop
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Solution Overview
Problem
Current packing materials for size exclusion chromatography face challenges with mechanical strength and back pressure issues, particularly when used in large-scale industrial applications, where small particle diameters lead to compaction and increased pressure drop, while larger diameters compromise separation performance.
Innovation Solution
A packing material is developed by polymerizing a monomer with a glycidyl group and a crosslinking agent, followed by hydrophilization using a sugar alcohol and ring-opening of glycidyl groups, resulting in porous particles with enhanced mechanical strength and low column pressure drop, suitable for large-scale biopolymer separation and fractionation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If packing materials with small average particle diameters (3-15 μm) are used for analytical uses, then separation performance is improved, but back pressure becomes excessively high for industrial scale applications
Solution Approach 1:
The patent changes the mechanical strength parameter of the packing material by introducing a crosslinked structure through reaction with ethylene glycol, glycerol, or other polyols. This chemical modification enables small particles (3-15 μm) to maintain high mechanical strength, allowing them to be used at industrial scale without excessive back pressure while preserving their superior separation performance
Solution Approach 2:
The packing material is transformed into a composite structure by combining the base polymer matrix with crosslinking agents (ethylene glycol, glycerol, etc.). This composite approach creates a mechanically robust material that combines the advantages of small particle size (good separation) with the mechanical strength needed for industrial applications
2Strength
If packing materials with large average particle diameters (50 μm or more) are used to reduce back pressure, then mechanical strength is improved, but separation performance decreases
Solution Approach 1:
The patent fundamentally changes the mechanical strength parameter through chemical crosslinking, enabling small particles to achieve the mechanical strength typically associated with large particles. This eliminates the need to use large particle sizes to obtain sufficient mechanical strength, thereby preserving superior separation performance
3Volume of moving object
If packing materials with insufficient mechanical strength are used, then small particle diameters can be achieved for good separation, but compaction progresses and column pressure drop increases
Solution Approach 1:
The patent applies preliminary chemical modification by reacting the packing material with crosslinking agents before industrial use. This pre-crosslinking strengthens the particle structure in advance, preventing compaction and pressure drop increases that would otherwise occur during industrial-scale operation
Solution Approach 2:
The mechanical strength parameter is fundamentally changed through introduction of crosslinked structures. This chemical modification enables small particles to maintain their size without compaction, ensuring consistent separation performance over time
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 solution enables high-separation-performance packing materials with small particle diameters for large-scale use, reducing pressure drop and improving mechanical strength, allowing for efficient separation and fractionation of biopolymers like IgM and IgG with enhanced production simplicity and cost-effectiveness.
Implementation Method 1
porous particles made of a copolymer of glycidyl methacrylate and glycerol 1,3-dimethacrylate
Implementation Method 2
hydrophilization of the porous particles with a sugar alcohol
Implementation Method 3
separation and fractionation of biopolymers such as polysaccharides, peptides, proteins, DNAs, and RNAs using an aqueous eluent on the basis of the principle of size exclusion chromatography
Data Source
Figure 1
AI summary
An object of the present invention is to provide a packing material suitable for use as a packing material for size exclusion chromatography for fractionation that requires large-scale treatment, the packing material being capable of being produced by a simple process and reducing column pressure drop even when the particle diameter is small, and is to provide a method for producing the packing material. In the present invention, a packing material for size exclusion chromatography is obtained by a production process including polymerizing glycerol 1,3-dimethacrylate and glycidyl methacrylate in the presence of a polymerization initiator, hydrophilizing the resulting porous particles made of a copolymer using a sugar alcohol, and then opening the rings of remaining glycidyl groups using a mineral acid.