Mesoporous Membranes Spatial Control Functional Architectures
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Solution Overview
Problem
Current methods for producing mesoporous oxide structures with embedded organic functionalities are limited by their structural homogeneity and lack of spatial control over the placement of distinct organic groups, making it difficult to create materials with multiple functionalities and separated mesoporous regions.
Innovation Solution
A method involving the deposition of precursor mixtures with self-assembling surfactants and ceramic precursors in specific regions of a framework to form mesoporous ceramic substructures with distinct chemical activities, allowing for spatial control over the placement of regions with different chemical functionalities within the mesoporous membrane structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-step process is used to incorporate organic groups into mesoporous silica walls, then the manufacturing process is simplified, but spatial control over the placement of functional groups is lost
Solution Approach 1:
The patent divides the mesoporous structure into multiple regions with different organic functionalities by sequentially depositing different precursor mixtures into specific pore regions. This segmentation allows spatial control over functional group placement while maintaining process simplicity through a modular approach.
Solution Approach 2:
The patent uses photopatterning to selectively activate certain pore regions before deposition, creating a preliminary spatial map that guides subsequent precursor deposition. This preliminary action enables precise spatial control without complicating the overall manufacturing process.
2Manufacturing precision
If a sequential process is used to deposit organic groups into mesoporous structures, then spatial control can be achieved, but the manufacturing process becomes considerably more difficult
Solution Approach 1:
The patent introduces photopatterning as an intermediary step that simplifies the sequential deposition process by pre-defining which regions will receive which functional groups. This intermediary approach makes the overall process more manageable while maintaining high spatial precision.
Solution Approach 2:
The patent replaces complex mechanical or chemical masking methods with photopatterning, which uses light to selectively activate regions. This substitution simplifies the manufacturing process while achieving the same spatial control that would otherwise require cumbersome sequential deposition techniques.
3Manufacturing precision
If UV light photopatterning is used to selectively activate mesoporous regions, then spatial control is achieved for photosensitive groups, but the method cannot be universally applied to non-photosensitive groups
Solution Approach 1:
The patent employs multiple activation methods including photopatterning, thermal treatment, and chemical etching to accommodate different types of organic groups. This multi-functional approach ensures the methodology can be universally applied to both photosensitive and non-photosensitive functional groups while maintaining spatial control.
Solution Approach 2:
The patent changes the activation parameters (light wavelength, temperature, chemical etchant type) depending on the specific organic groups being deposited. This parameter adjustment allows the same general methodology to be universally applied to different functional groups with varying sensitivity requirements.
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
Enables the creation of mesoporous membrane structures with complex architectures, providing spatial control over the placement of regions with different chemical activities, enhancing their chemical functionality and versatility for applications such as filtration and catalysis.
Implementation Method 1
both of the first and second precursor mixtures comprise a quantity of a self-assembling surfactant species, a quantity of ceramic precursor
Data Source
AI summary
In some embodiments, the present invention is directed to methods of making structures with complex functional architectures, where such structures generally comprise at least two mesoporous regions comprising different chemical activity, and where such methods afford spatial control over the placement of such regions of differing chemical activity. In some embodiments, the present invention is also directed to the structures formed by such methods, where such structures are themselves novel.