Dual-Pore Polymeric Microparticles for Broader Chromatographic Separation
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Solution Overview
Problem
Existing chromatography methods using polysaccharide gel beads face challenges in achieving efficient separation of both larger and smaller biomacromolecules due to limited pore size and structural integrity issues, leading to reduced separation efficiency and potential collapse at high flow rates.
Innovation Solution
The development of polymeric microparticles with dual-size pores, comprising macropores and smaller gel pores, formed by crosslinking rigid nanoparticles with controlled orientation, providing structural support and maintaining ordered internal structures to enhance separation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If larger pores are used in polysaccharide gel beads to improve diffusion rate of biomacromolecules, then separation efficiency improves, but the chromatographic medium collapses at higher flow rates due to lower rigidity
Solution Approach 1:
The patent creates a composite structure by introducing inorganic porous particles (silica, alumina, or titania) into the polysaccharide gel matrix. These inorganic particles form a rigid skeleton that provides mechanical strength and prevents collapse at high flow rates, while the gel pores between particles maintain the necessary porosity for biomacromolecule diffusion. This composite approach resolves the contradiction between requiring large pores for efficient separation and needing rigidity to prevent structural collapse.
Solution Approach 2:
The patent applies different properties to different regions of the chromatographic medium. The inorganic particles are distributed throughout the gel matrix to provide localized rigid support structures, while the gel regions between particles maintain their gel-like properties for molecular diffusion. This local differentiation allows the system to simultaneously achieve rigidity where needed (at particle locations) and porosity where needed (in gel regions), resolving the contradiction between strength and separation efficiency.
2Stability of the object's composition
If common crosslinking methods are used to form polysaccharide gel beads, then gel structure is formed, but pore size becomes smaller and separation range is limited
Solution Approach 1:
The patent introduces inorganic porous particles as intermediary structures within the gel matrix. These particles serve as spacers that maintain larger pore sizes between them, preventing the gel network from collapsing into a dense structure. The inorganic particles act as a scaffold that holds the gel network at a larger scale, thereby maintaining both gel structure stability and larger pore size for broader separation range.
Solution Approach 2:
The patent incorporates inorganic porous particles with controlled pore structures (silica, alumina, or titania) into the polysaccharide gel. These porous particles provide additional pathways for molecular transport and maintain larger effective pore sizes within the gel matrix, enabling the separation of macromolecules with a wider range of sizes while preserving the gel's structural integrity.
3Volume of stationary object
If pore-formers such as carbonate or metal oxide are introduced into microspheres to create larger pores, then macroporosity improves, but internal structure damages or collapses due to heat and gas release during acid treatment
Solution Approach 1:
The patent replaces traditional pore-forming agents (carbonates that require acid removal) with inorganic porous particles (silica, alumina, titania) that are structurally stable and do not require acid treatment for removal. These inorganic particles serve as permanent, stable pore-defining structures that eliminate the need for harmful acid processing steps, thereby preventing internal structure damage while maintaining macroporosity.
Solution Approach 2:
The patent converts the potential harm of using pore-forming agents that require acid removal into a benefit by selecting inorganic particles that are inherently stable and do not require acid treatment. The inorganic particles' resistance to acid corrosion becomes a beneficial property that allows macropore formation without the harmful side effects of gas release and heat generation during acid processing, thus preserving internal structure integrity.
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 polymeric microparticles with dual-size pores improve chromatographic separation efficiency by allowing uniform radial arrangement and mechanical stability, enabling effective separation of larger molecular weight biomolecules with reduced protein separation time.
Implementation Method 1
formed by crosslinking rigid nanoparticles with controlled orientation
Implementation Method 2
further comprising polysaccharide compounds for pressure resistance and structural support
Implementation Method 3
used as stationary phases for chromatographic separations
Data Source
AI summary
The present invention relates to a polymeric microparticle with dual size pores, and a preparation method therefor. The polymeric microparticle is formed by cross-linking at least partially cross-linkable oligomer materials, including rigid nanoparticles, wherein at least one of the rigid nanoparticles has a non-spherical shape in a solution. The polymeric microparticles have two sets of pores having distinctive sizes distributed inside, wherein the first set of pores are macropores larger in size, and the second set of pores are gel pores that are smaller in size and formed internal structural ordering at least in regions. While ensuring the ordering of molecules and pores of the original polymeric microparticles, the present invention allows for a second, larger pores within the polymeric microparticles, which can improve the permeability of the separation matrice, and thereby expanded the separation range of the polymeric microparticles in chromatographic analysis.