Polymeric Nanoparticles for Endotoxin Removal
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Solution Overview
Problem
Current methods for removing endotoxins from fluids are inefficient, with low selectivity and binding capacity, failing to decrease endotoxin levels to the safe exposure level of 0.05 ng/ml, and are economically unviable and time-consuming.
Innovation Solution
The development of polymeric nanoparticles with a maximum dimension between 300 nm and 500 nm, specifically designed to bind endotoxins, offering an endotoxin removal capacity of at least 1×10^9 endotoxin units per gram and an efficacy of 1×10^6 endotoxin units per cm² of nanoparticle surface area, using polymers like Poly(ϵ-caprolactone) for effective interaction and separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional endotoxin removal methods are used, then the process is simple to implement, but the endotoxin removal capacity is low and cannot achieve safe exposure levels
Solution Approach 1:
The patent changes the physical parameters of the removal system by using nanoparticles with specific size ranges (300-500 nm maximum dimension) and specific surface properties, which fundamentally alters the binding capacity and efficiency compared to conventional bulk materials. This parameter change enables achieving safe endotoxin exposure levels while maintaining practical removal rates.
Solution Approach 2:
The patent employs composite polymeric nanoparticle structures with specific surface compositions that combine high endotoxin binding affinity with appropriate surface properties. These composite materials achieve both high removal capacity (at least 1×10^9 EU/g) and high efficacy (at least 1×10^6 EU/cm²), resolving the contradiction between reliability and productivity.
2Reliability
If conventional endotoxin removal methods are used, then the process is straightforward, but the binding capacity per unit mass is low
Solution Approach 1:
The patent segments the removal system into discrete nanoparticles with maximum dimensions between 300 nm and 500 nm. This segmentation dramatically increases the surface area to mass ratio, enabling the system to achieve binding capacities of at least 1×10^9 EU/g, thereby reducing the quantity of polymer material needed while improving reliability.
Solution Approach 2:
By changing the dimensional parameters to the nanoscale range and optimizing surface composition, the patent achieves extremely high binding capacity per unit mass (at least 1×10^9 EU/g), which directly addresses the contradiction between binding capacity and material quantity required.
3Reliability
If conventional endotoxin removal methods are used, then the equipment is simple, but the removal efficacy per unit surface area is insufficient
Solution Approach 1:
The patent divides the removal medium into numerous small nanoparticles (300-500 nm maximum dimension), which collectively provide vast surface area. This segmentation enables achieving removal efficacy of at least 1×10^6 EU/cm², as the total surface area of many small particles far exceeds that of equivalent mass in bulk form.
Solution Approach 2:
The patent uses composite nanoparticle materials with optimized surface compositions that maximize endotoxin binding per unit surface area. This composite approach achieves the required efficacy threshold of 1×10^6 EU/cm² while maintaining appropriate surface area characteristics.
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 nanoparticles achieve significantly higher endotoxin removal efficiency compared to existing systems, effectively reducing endotoxin levels in fluids, providing a safer and more cost-effective solution for endotoxin removal.
Implementation Method 1
at least a portion of the endotoxin molecules bind to an exterior surface of one or more of the polymeric nanoparticles
Data Source
AI summary
Systems and methods are provided for the removal of endotoxins from fluids. The methods can include the use of polymeric nanoparticles for binding endotoxins present in a fluid. The polymeric nanoparticles can be associated with a support member. The polymeric nanoparticles can have an endotoxin removal capacity of at least 1×109 endotoxin units per gram of polymeric nanoparticle (EU/g) and/or a removal efficacy per unit surface area of the polymeric nanoparticles of at least 1×106 EU/cm2.