Vertically Aligned Pore Channels in Polymer Membranes
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Solution Overview
Problem
Current synthetic membranes for water purification face challenges in reliability and high cost due to limitations in scalable manufacturing, which hinders their widespread adoption, particularly in achieving fast and selective ion transport with vertically aligned pore channels and densely packed pores.
Innovation Solution
Nanoporous polymer membranes with vertically aligned hollow pore channels are synthesized through self-assembly of amphiphilic block copolymers, allowing for controlled pore size and surface chemistry functionalization, enabling efficient anion transport and scalable production via methods like spin coating and atomic/molecular layer deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional membrane synthesis methods are used, then manufacturing cost is reduced, but membrane performance (selectivity and fast transport) deteriorates
Solution Approach 1:
The patent changes the fundamental parameters of membrane structure by creating vertically aligned pore channels with controlled size (1-10 nm) and specific surface chemistry through block copolymer self-assembly, achieving superior ion selectivity and transport properties while maintaining scalability
Solution Approach 2:
The patent uses amphiphilic block copolymers that self-assemble into composite structures with distinct hydrophobic and hydrophilic domains, creating vertically aligned pore channels with controlled surface chemistry that combine structural integrity with selective transport functionality
2Speed
If vertically aligned pore channels are implemented, then ion transport speed is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs self-service by utilizing the spontaneous self-assembly of amphiphilic block copolymers into vertically aligned pore structures when deposited from solution, eliminating the need for complex top-down fabrication processes and enabling scalable manufacturing of membranes with optimized transport channels
Solution Approach 2:
The patent exploits phase transitions during solvent evaporation and thermal annealing to drive the self-assembly of block copolymers into ordered vertically aligned pore structures, transforming disordered polymer chains into structured membranes with controlled morphology
3Reliability
If pore size is reduced for selective transport, then selectivity is improved, but transport efficiency deteriorates
Solution Approach 1:
The patent applies local quality by creating uniform nanoscale pores (1-10 nm) with specific surface chemistry characteristics throughout the membrane, where the localized pore size and surface properties are optimized for selective ion transport while maintaining high flux through vertical alignment and dense packing
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 resulting membranes demonstrate excellent selectivity and fast transport capabilities, reducing the cost and enhancing the reliability of water treatment technologies, with the ability to be applied as thin or thick films on large substrates and tuned for specific ion transport properties.
Implementation Method 1
The porous membranes can be synthesized through self-assembly of amphiphilic block copolymers on the substrate
Implementation Method 2
self-assembly of amphiphilic block copolymers
Implementation Method 3
the pore surface chemistry can be functionalized for selective anion transport, for example to be positively charged pyridine groups
Implementation Method 4
The pore size can be controlled to be of order 10 nm
Implementation Method 5
atomic/molecular layer deposition (ALD/MLD) can be used to further tune the pore size and to functionalize pore surface chemistry for selectivity
Data Source
AI summary
A nanoporous polymer membrane with vertically aligned pore channels can be synthesized through self-assembly of amphiphilic block copolymers on a supporting substrate. The pore surface chemistry can be functionalized for selective anion transport.