Mesoporous Silica Sorbent for VOC Capture and Stabilization
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Solution Overview
Problem
Current monitoring devices for volatile and semi-volatile compounds have limitations in capacity, rate of uptake, and storage stability, and the training of explosive detection animals requires the use of actual explosives, which is costly, risky, and inefficient.
Innovation Solution
Development of a silica-based sorbent that captures and stabilizes a wide range of volatile and semi-volatile organic compounds, allowing for long-term storage and simultaneous collection of samples with varying exposure periods, and provides a non-detonable form of explosive compounds for training, eliminating the need for actual explosives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If porous polymer and nanostructured material are used together in composite thin film, then capture capacity is improved, but thermal degradation risk increases during thermal desorption analysis
Solution Approach 1:
The patent removes the porous polymer component from the composite material system, retaining only the inorganic nanostructured material (such as mesoporous silica). This extraction eliminates the thermal degradation issue while preserving the capture capacity through the inorganic material's inherent porosity and surface area.
Solution Approach 2:
The patent employs inorganic composite materials, specifically mesoporous silica structures with controlled pore sizes and surface functional groups, to replace the organic-inorganic composite. These inorganic composites provide both the structural framework and the active capture sites without suffering from thermal degradation.
2Quantity of substance
If porous polymer is used in composite thin film, then capture capacity is improved, but contamination risk increases during solvent extraction
Solution Approach 1:
The patent extracts the porous polymer component from the system, eliminating the source of monomeric and dimeric contamination that occurs during solvent extraction. The inorganic nanostructured material alone provides sufficient capture capacity without introducing organic contaminants.
Solution Approach 2:
The patent utilizes inorganic porous materials (mesoporous silica) with well-defined pore structures and surface properties that enable effective capture of target compounds while being chemically inert during solvent extraction, thus preventing contamination.
3Reliability
If actual explosives are used for training detection animals, then training effectiveness is improved, but safety risk and cost increase
Solution Approach 1:
The patent creates simplified copies or analogs of explosive compounds that replicate the key detection characteristics (vapor properties, molecular structure features) without possessing the dangerous properties of actual explosives. These surrogate compounds enable effective animal training while eliminating safety risks.
Solution Approach 2:
The patent employs inexpensive, non-hazardous surrogate materials that can be used freely for training purposes without the strict handling, storage, and disposal requirements associated with actual explosives. These materials provide sufficient training effectiveness at minimal cost and risk.
4Measurement precision
If actual explosives are used for training, then detection accuracy is improved, but handling cost and complexity increase
Solution Approach 1:
The patent develops surrogate explosive compounds that replicate the essential detection characteristics of real explosives, allowing detection animals to learn and demonstrate accurate detection skills without requiring the complex handling protocols necessary for actual explosive materials.
Solution Approach 2:
The patent uses inexpensive, easily handled surrogate materials that eliminate the bureaucratic and procedural complexity associated with managing actual explosives, while maintaining sufficient training effectiveness for achieving accurate detection performance.
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 sorbent enables efficient capture and stabilization of compounds for extended periods, reducing costs and risks associated with handling explosives, while providing a stable and efficient method for monitoring and training explosive detection animals.
Implementation Method 1
The sorbent material useful in sampling chemical vapors for area monitoring and personal exposure monitoring through the application of diffusive samplers (passive dosimeters)
Implementation Method 2
The sorbent and devices of the invention are capable of capturing and stabilizing low to high amounts of one or more volatile organic compound(s) (VOC) or semi-volatile organic compound(s) (SVOC)
Data Source
AI summary
The present invention provides an improved sorbent and corresponding device(s) and uses thereof for the capture and stabilization of volatile organic compounds (VOC) or semi-volatile organic compounds (SVOC) from a gaseous atmosphere. The sorbent is capable of rapid and high uptake of one or more compounds and provides quantitative release (recovery) of the compound(s) when exposed to elevated temperature and/or organic solvent. Uses of particular improved grades of mesoporous silica are disclosed.