Functionalized Particulate Support for HPLC Protein Purification
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Solution Overview
Problem
Current cation and anionic exchange chromatographic materials face challenges in protein purification due to limited diffusion of high molecular weight biomolecules, and existing polymerization methods, such as 'graft from' chemistry, generate hazardous waste.
Innovation Solution
Development of functionalized particulate support materials with a combination of functional groups that enable polymerization and increase wettability, using inorganic metal oxide particles like silica, and a method involving silane treatment to create a chromatography column or cartridge suitable for HPLC and FPLC applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 'graft from' polymerization chemistry is used to create tentacles on media surface, then protein loading capacity is improved, but hazardous waste is generated
Solution Approach 1:
The patent replaces the harmful Ce(IV) salt-based redox chemistry with a beneficial silane-based surface treatment followed by controlled radical polymerization. The silane treatment creates surface-bound functional groups that initiate polymerization without generating hazardous waste, while still achieving the desired tentacle formation for high protein loading capacity.
Solution Approach 2:
The patent changes the chemical parameters of the surface treatment process by using silane-based chemistry instead of Ce(IV) salt-based redox chemistry. This parameter change eliminates the generation of hazardous waste while maintaining the ability to create polymer tentacles on the media surface for effective protein purification.
2Productivity
If high molecular weight biomolecules are used in separation processes, then separation capability is improved, but diffusion to media surface is limited
Solution Approach 1:
The patent extends the stationary phase from a two-dimensional surface layer into the third dimension by creating polymer tentacles that protrude from the media surface. This dimensional extension allows high molecular weight biomolecules to interact with the stationary phase without requiring deep diffusion into the media pores, thereby maintaining separation capability while overcoming diffusion limitations.
Solution Approach 2:
The patent utilizes porous media with controlled pore structures as the base support for the polymer tentacles. The porous structure provides a high surface area foundation that supports extensive tentacle formation, increasing the available interaction sites for biomolecules while maintaining efficient mass transfer characteristics.
3Ease of manufacture
If inorganic metal oxide particles are used as support material, then cost-effectiveness is improved, but surface wettability needs enhancement
Solution Approach 1:
The patent creates a composite material system by combining inorganic metal oxide particles with organic silane functional groups and polymer chains. The inorganic core provides cost-effectiveness and structural stability, while the organic silane and polymer components enhance surface wettability and provide the necessary functional groups for polymerization and protein interaction.
Solution Approach 2:
The silane functional groups serve as intermediaries between the inorganic metal oxide particle surface and the organic polymer chains. These intermediary groups improve surface wettability and provide bonding sites for polymer attachment, bridging the gap between the hydrophobic inorganic surface and the hydrophilic polymer phases.
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 functionalized particulate support materials enhance protein loading and separation efficiency while being cost-effective and environmentally friendly by reducing hazardous waste generation.
Implementation Method 1
a first set of functional groups that enable polymerization of one or more monomers onto the particle surface via the first set of functional groups
Implementation Method 2
a second set of functional groups that increases the wettability of the particle surface
Implementation Method 3
The grafted polymer chains contain repeating units of ionic groups, connected from the end of the polymers to the surface of the media. These polymer chains can rotate freely, allowing interactions between protein molecules and polymeric stationary phase
Data Source
AI summary
Functionalized particulate support material and chromatographic media prepared therefrom are disclosed. The functionalized particulate support material is a plurality of particles, each particle having a particle surface. Chemically bonded to and extending from the surface of the particles is a combination of hydrophobic and hydrophilic functional groups. The hydrophobic functional groups enable polymerization of one or more monomers onto the particle surface while the hydrophilic functional groups provide increased wettability of the particle surface compared to an unmodified particle surface. The functionalized particulate support material may be further processed so as to form polymer chains extending from the hydrophobic functional groups. In one embodiment, the resulting polymer functionalized material is useful as a chromatographic media in chromatography columns or cartridges, such as in a liquid chromatography (HPLC) column. Chromatography columns or cartridges containing the polymer functionalized media, and methods of making and using the media, are also disclosed.