Microporous Membrane Teardrop Structures for Uniform Particle Filtration
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Solution Overview
Problem
Current methods for optimizing the microstructure and performance of porous polymer membranes, such as those used in filtration and chromatography, are empirical and lack mechanistic understanding, leading to inefficiencies and high costs, with a need for improved approaches to determine optimal membrane structure and chemistry for enhanced selectivity and capacity.
Innovation Solution
A computational fluid dynamics tool is used to simulate and optimize membrane performance in silico, combining 2D/3D fluid and particle drag mechanics with intermolecular force measurements to design computer-generated teardrop structures that enhance flow field uniformity and surface reactivity, guiding the synthesis of improved microporous membranes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If empirical optimization of phase inversion process is used to control pore formation, then membrane structure can be adjusted, but the process is costly and time-consuming with lack of mechanistic understanding
Solution Approach 1:
The patent applies parameter changes by systematically varying phase inversion parameters (solvent composition, non-solvent addition rate, temperature, humidity) to control pore formation kinetics. This enables precise control of pore size distribution and membrane morphology while reducing optimization time through understanding the mechanistic relationships between parameters and structural outcomes.
Solution Approach 2:
The patent employs preliminary action by pre-calculating and pre-planning the phase inversion process parameters based on desired pore structures. Computational models and phase diagrams are used beforehand to determine optimal parameter combinations, eliminating trial-and-error experimentation and significantly reducing the time and cost of membrane optimization.
2Reliability
If empirical optimization is used to achieve desired pore size distribution, then filtration performance can be improved, but the approach lacks mechanistic understanding and reproducibility
Solution Approach 1:
The patent implements feedback by continuously monitoring phase inversion process parameters and their effects on pore formation. Real-time measurement techniques track solvent-nonsolvent exchange kinetics and pore structure development, allowing dynamic adjustment of parameters to achieve consistent desired outcomes and build mechanistic understanding of structure-performance relationships.
Solution Approach 2:
The patent replaces empirical mechanical trial-and-error optimization with theoretical and computational approaches. Phase inversion thermodynamics, transport equations, and computational models substitute for purely empirical methods, providing mechanistic understanding of pore formation mechanisms and enabling rational design of membrane structures with predictable filtration performance.
3Productivity
If pressure-driven membrane processes are used for separation, then filtration can be achieved, but selectivity is rate-limited and tracking species movement is extremely challenging
Solution Approach 1:
The patent employs color changes by using tracer particles with distinct optical properties and advanced imaging techniques to visualize and track species movement through the membrane. This allows direct observation of transport pathways, pore utilization, and separation mechanisms while maintaining pressure-driven filtration rates, making the invisible visible for analysis and optimization.
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 method provides insights into particle capture and flow dynamics, leading to improved filtration performance by equalizing flow paths and enhancing selectivity and permeation flux, with computational predictions qualitatively agreeing with experimental measurements.
Implementation Method 1
assay for filtration of suspended particles in microporous membranes
Implementation Method 2
calculating fluid dynamic characteristics of at least one of a membrane and a material to be passed through the membrane from an inlet end of the membrane to an outlet end of the membrane
Implementation Method 3
obtaining characteristics of at least one force acting on the particles of the material to be passed through the membrane due to the interaction between the particles and the membrane, the at least one force being an intermolecular force
Data Source
AI summary
A method of assessing a membrane includes calculating fluid dynamic characteristics of at least one of a membrane and a material to be passed through the membrane, the membrane includes a plurality of rows and a plurality of teardrop structures arranged in the plurality of rows, the material includes particles; obtaining characteristic of at least one force acting on the particles of the material to be passed through the membrane due to the interaction between the particles and the membrane, the at least one force being an intermolecular force; and combining the calculated fluid dynamic characteristic and the obtained characteristics to assess the flow of the material through the membrane. In some embodiments, the teardrop structures in each row are arranged at substantially the same angle with respect to an anticipated direction of flow through the membrane.