Functionalized Microporous Membrane for Biomaterial Purification
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Solution Overview
Problem
The separation and purification of targeted biomaterials from cell culture fluids are challenging due to the presence of contaminants and high salt concentrations, leading to extensive and costly downstream processing.
Innovation Solution
A filtration method using a functionalized microporous membrane with guanidyl groups is employed. The membrane is used to capture and elute targeted biomaterials by controlling the pH of the biological fluid and the elution fluid, thereby improving the efficiency of the purification process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If extensive downstream processing is used to purify biomaterials from cell culture fluids, then purification quality is improved, but processing cost and time increase significantly
Solution Approach 1:
The patent combines multiple purification functions (filtration, concentration, and pH-based separation) into a single integrated membrane system. The functionalized membrane performs both physical filtration and chemical separation simultaneously, eliminating the need for multiple sequential processing steps while maintaining high purification quality.
Solution Approach 2:
The functionalized membrane serves multiple functions: it acts as a physical filter, a concentration device, and a pH-responsive separation medium. This multi-functionality allows a single device to replace multiple specialized processing steps, reducing overall processing time while achieving comprehensive purification.
2Manufacturing precision
If extensive downstream processing is used to purify biomaterials, then purification quality is improved, but processing cost increases
Solution Approach 1:
The patent combines multiple purification functions (filtration, concentration, and pH-based separation) into a single integrated membrane system. The functionalized membrane performs both physical filtration and chemical separation simultaneously, eliminating the need for multiple sequential processing steps while maintaining high purification quality.
Solution Approach 2:
The patent utilizes pH as a controllable parameter to achieve selective separation. By adjusting the pH of the eluate, the functionalized membrane selectively binds or releases target biomaterials, enabling high-purity separation without requiring multiple expensive processing steps. This parameter-based control reduces both time and cost.
3Device complexity
If traditional filtration methods are used, then equipment simplicity is maintained, but contaminant removal efficiency is insufficient
Solution Approach 1:
The patent applies functionalization specifically to the membrane surface, creating localized active sites with pH-responsive groups. This local modification enhances contaminant removal efficiency at the membrane interface while keeping the bulk membrane structure simple and maintaining overall equipment simplicity.
Solution Approach 2:
The patent creates a composite membrane structure combining a base membrane material with pH-responsive functional groups. This composite approach integrates the mechanical strength and porosity of simple filtration membranes with the selective separation capabilities of functionalized materials, achieving high contaminant removal without complex equipment.
4Quantity of substance
If pH control is applied during elution, then target biomaterial recovery is improved, but process complexity increases
Solution Approach 1:
The patent utilizes pH as a controllable parameter to achieve selective separation. By adjusting the pH of the eluate, the functionalized membrane selectively binds or releases target biomaterials, enabling high-purity separation without requiring multiple expensive processing steps. This parameter-based control reduces both time and cost.
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 method enhances the cost efficiency of biomaterial isolation and purification by reducing the number of process steps, increasing throughput, and effectively removing contaminants, thereby minimizing the load on downstream purification devices.
Implementation Method 1
contacting a biological fluid comprising a target with the filtration medium, wherein the biological fluid has a pH equal to or greater than an isoelectric point of the target; and eluting the target from the filtration medium with a second fluid to obtain a target solution, wherein the second fluid has a pH less than the pH of the biological fluid and less than an isoelectric point of the target
Data Source
AI summary
Described herein is a method. The method includes providing a filtration medium comprising a functionalized microporous membrane, wherein the functionalized microporous membrane comprises a plurality of guanidyl groups; contacting a biological fluid comprising a target with the filtration medium, wherein the biological fluid has a pH equal to or greater than an isoelectric point of the target; and eluting the target from the filtration medium with a second fluid to obtain a target solution, wherein the second fluid has a pH less than the pH of the biological fluid and less than an isoelectric point of the target.