Polysaccharide Composite Particles for High-Flow Chromatography

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Solution Overview

Problem

Current chromatographic carriers face challenges in achieving a balance between high binding capacity for biopolymers and resistance to high flow rates, leading to issues such as deformation and increased back pressure during purification processes in biopharmaceutical applications.

Innovation Solution

The method involves dissolving polysaccharides in an ionic liquid and dispersing them in an organic solvent with low compatibility, followed by coagulation to form polysaccharide composite particles or reacting with a crosslinking agent during droplet dispersion to create crosslinked polymer particles, enhancing mechanical strength and binding capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If polysaccharide gel particles are used as chromatographic carriers, then binding capacity for biopolymers is improved, but mechanical strength deteriorates

Engineering Contradiction:
Improvebinding capacityVSAvoidmechanical strength
Core Design Contradiction:
ReliabilityVSStrength

Solution Approach 1:

The patent uses composite materials by combining polysaccharides with other materials (such as silica or synthetic polymers) to create carriers that exhibit both high binding capacity and mechanical strength. This allows the carrier to maintain the hydrophilic surface properties of polysaccharides while gaining the structural integrity of inorganic or synthetic components.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent modifies parameters of polysaccharide gel particles through crosslinking treatments or chemical modifications to enhance mechanical strength while preserving binding capacity. By changing the molecular structure and physical properties of the polysaccharide matrix, the carrier can withstand higher flow rates without compromising its interaction with biopolymers.

Inventive Principle:
Principle #35Parameter changes

2Productivity

If polysaccharide gel particles are used at high flow rates, then productivity is improved, but particle deformation occurs

Engineering Contradiction:
Improveflow rateVSAvoidparticle shape stability
Core Design Contradiction:
ProductivityVSStability of the object's composition

Solution Approach 1:

By creating composite carriers combining polysaccharides with mechanically robust materials, the patent enables the use of high flow rates without particle deformation. The composite structure provides the necessary rigidity to maintain particle shape integrity under high-speed flow conditions while preserving the functional properties of polysaccharides.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

Through crosslinking and chemical modification, the patent alters the physical parameters of polysaccharide particles to enhance their resistance to deformation. This allows the particles to withstand the mechanical stress of high flow rates during chromatographic operations.

Inventive Principle:
Principle #35Parameter changes

3Strength

If silica particles are used as carriers, then mechanical strength is improved, but binding capacity to biopolymers deteriorates

Engineering Contradiction:
Improvemechanical strengthVSAvoidbinding capacity
Core Design Contradiction:
StrengthVSReliability

Solution Approach 1:

The patent creates composite carriers where silica particles are combined with polysaccharide coatings or ligands. This composite structure provides the mechanical strength of silica while adding the hydrophilic surface properties and binding capacity of polysaccharides, thus resolving the contradiction between strength and binding ability.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent applies local quality modification by coating silica particles with polysaccharide layers or introducing specific ligands on the particle surface. The core silica provides mechanical strength, while the surface layer provides binding capacity, allowing each component to fulfill its specific function.

Inventive Principle:
Principle #3Local quality

4Strength

If synthetic polymer particles are used as carriers, then mechanical strength is improved, but non-specific interactions increase

Engineering Contradiction:
Improvemechanical strengthVSAvoidnon-specific interactions
Core Design Contradiction:
StrengthVSObject-generated harmful factors

Solution Approach 1:

The patent combines synthetic polymers with polysaccharide materials to create composite carriers. The synthetic polymer matrix provides mechanical strength, while the polysaccharide surface layer reduces non-specific interactions by providing a hydrophilic environment that is less prone to adsorbing impurities.

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent modifies the surface properties of synthetic polymer particles by coating them with polysaccharides or introducing hydrophilic functional groups. This local modification maintains the bulk mechanical strength of the synthetic polymer while creating a surface that minimizes non-specific interactions with biological molecules.

Inventive Principle:
Principle #3Local quality

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 approach results in polymer particles that can withstand high flow rates while maintaining high binding capacity for proteins, significantly improving the efficiency and productivity of biopharmaceutical purification processes.

Implementation Method 1

dispersing them in an organic solvent with low compatibility

Methodology Applied
Scientific EffectDispersion: Dispersion (of waves)

Implementation Method 2

dispersing in an organic solvent having low compatibility with the ionic liquid

Methodology Applied
Scientific EffectLiquid-Liquid Extraction: Liquid-Liquid Extraction

Implementation Method 3

coagulation to form polysaccharide composite particles

Methodology Applied
Scientific EffectCoagulation: Coagulation

Data Source

PatentUS9352298B2Method for producing polymer particles, and polymer particles
Publication Date: 2016.05.31 MERCK PATENT GMBH
  • US9352298B2 patent drawing

AI summary

Provided are polymer particles which can be used at a high flow rate when used as a filler for chromatography, that is, has excellent resistance flow rate appropriate for processing in large quantities, and also has a high binding capacity for target molecules such as proteins when an appropriate ligand is contained in the particles, and a method for producing the polymer particles; specifically, crosslinked polymer particles and a method for producing the crosslinked polymer particles, polysaccharide composite particles and a method for producing the polysaccharide composite particles, a filler for chromatography using the polymer particles, and an adsorbent for antibody purification. Disclosed are: A. a method for producing polysaccharide composite particles, the method including the following steps (1) to (3): (1) a step of preparing a polysaccharide solution, in which two or more kinds of polysaccharides are dissolved in an ionic liquid; (2) a step of preparing a droplet dispersion liquid of the polysaccharide solution, in which liquid droplets of the polysaccharide solution are dispersed in an organic solvent having low compatibility with the ionic liquid; and (3) a coagulation step in which a composite of the polysaccharides are coagulated to obtain the polysaccharide composite particles; and B. a method for producing a crosslinked polymer particle, the method including a step of allowing a polymer dissolved in an ionic liquid, to react with a crosslinking agent while the polymer is subjected to droplet dispersion in an organic solvent having low compatibility with the ionic liquid.