SEC Packing Material Surface Chemistry for Alkali Resistance
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Solution Overview
Problem
There is a need for a packing material for size exclusion chromatography that exhibits high alkali resistance, suitable for industrial-scale purification of large molecular-sized biopolymers such as virus vectors, while minimizing non-specific adsorption and enabling efficient cleaning and regeneration.
Innovation Solution
A packing material comprising a crosslinked copolymer of glycidyl methacrylate and a polyfunctional monomer, with an alkylene group bonded to a porous particle and a polyol attached via an ether bond, providing a hydrophobic-hydrophilic surface structure for enhanced alkali resistance and fractionation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a packing material is designed for high alkali resistance, then cleaning and regeneration capability is improved, but fractionation efficiency and separation performance may deteriorate
Solution Approach 1:
The packing material applies local quality by creating a hydrophobic outer layer through grafting alkylene groups and polyols onto the porous particle surface. This surface modification provides alkali resistance where needed while maintaining the internal porous structure's fractionation capability. The hydrophobic layer protects against alkali degradation without interfering with the size exclusion separation function in the particle interior.
Solution Approach 2:
The invention uses composite materials by combining a crosslinked copolymer base material with grafted alkylene groups and polyol chains. This composite structure integrates the porous particle's separation function with a protective hydrophobic coating that provides alkali resistance. The composite approach allows simultaneous achievement of both fractionation efficiency and chemical stability.
2Adaptability or versatility
If a packing material is designed for industrial-scale purification, then handling large molecular-sized biopolymers is improved, but non-specific adsorption increases
Solution Approach 1:
The packing material applies local quality by creating a hydrophobic outer layer through grafting alkylene groups and polyols onto the porous particle surface. This surface modification provides alkali resistance where needed while maintaining the internal porous structure's fractionation capability. The hydrophobic layer protects against alkali degradation without interfering with the size exclusion separation function in the particle interior.
Solution Approach 2:
The invention utilizes porous materials by employing a crosslinked copolymer matrix with controlled porosity that allows large molecular-sized biopolymers to enter and be separated based on their size. The porous structure provides sufficient surface area and volume for separating large molecules while the hydrophobic coating prevents non-specific adsorption on the particle surface.
3Reliability
If a packing material uses expensive specialized monomers, then alkali resistance is improved, but manufacturing cost increases
Solution Approach 1:
The invention applies parameter changes by modifying the surface properties of a common crosslinked copolymer through grafting reactions with alkylene groups and polyols. Instead of using expensive specialized monomers from the start, the approach changes the chemical parameters of the particle surface after synthesis, achieving alkali resistance at lower cost through post-modification rather than high-cost raw materials.
Solution Approach 2:
The invention uses cheap short-living objects by employing a cost-effective crosslinked copolymer base material that can be easily synthesized from common monomers. The hydrophobic protection is added through grafting rather than using expensive specialized monomers throughout, reducing manufacturing cost while maintaining sufficient alkali resistance for industrial applications.
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 material achieves high alkali resistance, allowing for efficient separation and purification of biopolymers with reduced non-specific adsorption, and can be produced from inexpensive materials, making it suitable for industrial applications.
Implementation Method 1
Size exclusion chromatography, which separates a molecule in order of size thereof, is widely used to separate a water-soluble polymer such as a polysaccharide, a peptide, a protein, DNA, or RNA.
Implementation Method 2
a packing material having a structure in which an alkylene group bonded to a porous particle including a crosslinked copolymer of a monomer having a glycidyl group and a crosslinking agent, and a polyol bonded to the other end of the alkylene group
Data Source
AI summary
Provided are a packing material used for size exclusion chromatography, which has high alkali resistance and suppressed non-specific adsorption, and a method for producing the same. A packing material, wherein to a porous organic polymer carrier including 60 to 95 mol% of a repeating unit derived from glycidyl methacrylate and 5 to 40 mol% of a repeating unit derived from a polyfunctional monomer, one end of at least one alkylene group selected from a linear alkylene group, a cycloalkylene group, and a linear alkylcycloalkylene group, having 4 to 9 carbon atoms is bonded by a glycidyl group derived from glycidyl methacrylate, and an other end of the alkylene group is bonded to any one end of a polyol via an ether bond.