Core-Shell Magnetic Silica Particles for High-Purity Protein Separation
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Solution Overview
Problem
Conventional purification methods using column chromatography for biological substances like proteins require large columns, extensive buffer usage, and are time-consuming, resulting in high costs, and existing magnetic silica particle methods yield impure products with high non-target protein content.
Innovation Solution
Development of core-shell particles with a magnetic silica core and silica shell, where the magnetic metal oxide particles constitute 60-95 wt% of the core, and a silica shell with a controlled thickness and particle size distribution, enabling efficient separation and purification of substances by magnetic forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If column chromatography is used for purification, then high purity can be achieved, but large columns, extensive buffer usage, and long processing time result in high cost
Solution Approach 1:
The patent replaces the mechanical column chromatography system with a magnetic field-based separation system. Magnetic silica particles are used to selectively bind target proteins through magnetic forces, enabling separation without requiring large columns or extensive buffer volumes, thus reducing processing time and cost while maintaining purification effectiveness
Solution Approach 2:
The patent changes the separation mechanism from size/exclusion-based (column chromatography) to magnetic property-based separation. By incorporating magnetic metal oxide particles into silica particles, the system exploits magnetic properties to achieve selective binding and separation, fundamentally changing how purification is achieved and enabling smaller-scale, faster processing
2Ease of operation
If magnetic silica particles are used for separation, then easy separation and recovery by magnetic force is achieved, but the purified product contains large amount of non-target proteins resulting in insufficient purity
Solution Approach 1:
The patent applies local quality by creating a core-shell structure where the core contains magnetic metal oxide particles for magnetic separation, while the shell is composed of silica with specific pore properties. This localized differentiation allows the core to provide magnetic recoverability while the shell provides selective binding characteristics that improve purity by reducing non-target protein contamination
Solution Approach 2:
The patent uses composite materials by combining magnetic metal oxide particles with silica to create core-shell structured particles. This composite structure integrates the magnetic properties needed for easy separation with the selective binding properties of silica, achieving both ease of operation and high product purity simultaneously
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 core-shell particles allow for the attainment of highly purified products with improved separability and reduced processing time, enhancing the efficiency and cost-effectiveness of the separation process.
Implementation Method 1
a core layer (P) as magnetic silica particles containing magnetic metal oxide particles (A)
Data Source
AI summary
The present invention aims to provide core-shell particles that can be used in a method of separating a substance to be separated and that allow obtainment of a highly purified product. Each of a plurality of core-shell particles (C) of the present invention includes a core layer (P)as magnetic silica particles containing the magnetic metal oxide particles (A) and a shell layer (Q) that is a silica layer on a surface of the core layer (P), an average thickness of a plurality of shell layers (Q) being 3 to 3000 nm, wherein a weight percentage of the magnetic metal oxide particles (A) in the core layer (P) is 60 to 95 wt% based on a weight of the core layer (P), and the plurality of core-shell particles (C) have a particle size distribution with a coefficient of variation of 50% or less.