Polymeric Gel Trapping Toxic Chemical Agents
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Solution Overview
Problem
Existing decontamination systems for organophosphorus compounds, such as alkaline solutions and adsorbent mixtures, are ineffective against persistent type V nerve agents like VX and VR-55, and they often require complex application methods and special equipment.
Innovation Solution
A solution comprising a protic solvent, a monomer with (alkyl)acrylic, (alkyl)acrylate, or (alkyl)acrylamide groups, a crosslinking agent, a photopolymerization initiator, and alkali halides, phosphates, or sulphates, which forms a polymeric material capable of trapping toxic chemical agents through photopolymerization, creating a cohesive gel that can be easily removed from contaminated surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alkaline solutions are used for decontamination, then the kinetics of hydrolysis of Sarin and Soman gases is increased, but the system is ineffective against type V nerve agents like VX and VR-55
Solution Approach 1:
The patent develops a polymeric material that can effectively decontaminate all types of organophosphorus compounds including type V nerve agents, making a single system universally effective against multiple classes of toxic agents rather than requiring different systems for different agent types
Solution Approach 2:
The invention uses a composite polymeric material incorporating nucleophilic groups (such as oximate or hydroxamate functions) within the polymer structure, combining the benefits of polymer matrix stability with the chemical reactivity needed to degrade persistent nerve agents like VX
2Reliability
If conventional decontamination systems are used, then decontamination can be achieved, but complex application methods and special equipment are required
Solution Approach 1:
The polymeric material is designed to be self-contained and self-applicable, forming a cohesive gel that can be directly applied to contaminated surfaces and then removed as a single unit, eliminating the need for complex application equipment, special rinsing procedures, or extensive training
Solution Approach 2:
The invention extracts the toxic chemical agents from the contaminated surface by trapping them within the polymeric gel matrix, which is then physically removed from the surface as a complete unit, simplifying the decontamination process to application and removal without intermediate steps
3Productivity
If polymeric materials with nucleophilic groups are used, then high dispersion efficiency and rapid degradation is achieved, but the system complexity increases
Solution Approach 1:
The patent modifies the chemical parameters of the polymer by incorporating specific functional groups (oximate or hydroxamate) with high nucleophilicity and appropriate pKa values (11-12), enabling rapid degradation of nerve agents through chemical reaction while maintaining a relatively simple polymer structure
Solution Approach 2:
The polymeric material concentrates the reactive nucleophilic groups at specific locations within the polymer structure where they can efficiently interact with the toxic agents, rather than requiring the entire system to be complex, achieving high reactivity through localized functional group placement
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 proposed solution effectively traps and degrades organophosphorus compounds, including type V nerve agents, on various surfaces without requiring special rinsing or treatment, achieving high efficiency and ease of use.
Implementation Method 1
a solution comprising at least one protic solvent, at least one monomer comprising an (alkyl)acrylic group, an (alkyl)acrylate group or an (alkyl)acrylamide group, at least one crosslinking agent comprising at least two groups chosen from (alkyl)acrylic, (alkyl)acrylate or (alkyl)acrylamide groups, at least one photopolymerization initiator
Implementation Method 2
these solutions or polymeric materials may find application in the decontamination of media comprising chemical organophosphorus compounds
Implementation Method 3
the use of alkaline solutions is ineffective against more persistent organophosphorus compounds... in order to improve the hydrolysis of these agents
Data Source
AI summary
A solution comprising at least one protic solvent, at least one monomer comprising an (alkyl)acrylic, (alkyl)acrylate or (alkyl)acrylamide group, at least one crosslinking agent comprising at least two groups chosen from (alkyl)acrylic, (alkyl)acrylate or (alkyl)acrylamide groups, at least one photopolymerization initiator and at least one agent chosen from alkali metal halides, alkali metal phosphates, alkali metal sulfates and mixtures thereof; or—of a polymer material capable of being obtained by polymerization of the solution defined above comprising a polymer resulting from the polymerization of the monomer(s) and of the crosslinking agent(s) as defined above and trapping, at the center thereof, a liquid phase comprising at least one agent as defined above; for the trapping of at least one toxic chemical agent.