Foaming Decontaminating Solution with Amine Oxide Mediator
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Solution Overview
Problem
Current decontamination methods for toxic chemical and bacteriological agents are aggressive towards contaminated materials and fail to effectively combine decontamination with blast reduction, as cationic surfactants used for decontamination are not good foaming agents and destabilize foams when combined with anionic surfactants.
Innovation Solution
An aqueous decontaminating and foaming solution comprising a water-soluble organic or mineral peroxidizing agent, an anionic surfactant, amine oxide, and an alkaline buffer, which generates a stable foam capable of decontaminating surfaces and reducing blast effects without using cationic surfactants, thereby maintaining foam stability and effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cationic surfactants are used for decontamination, then decontamination effectiveness is improved, but foam stability deteriorates and foam generation is poor
Solution Approach 1:
The patent introduces amine oxide as an intermediary substance that mediates between the decontamination function (provided by cationic surfactants) and foam stability (provided by anionic surfactants). The amine oxide forms complexes with both cationic and anionic surfactants, enabling coexistence without precipitation, thus allowing the system to achieve both decontamination effectiveness and foam stability simultaneously
Solution Approach 2:
The patent creates a composite surfactant system combining cationic surfactants, anionic surfactants, and amine oxide in specific proportions. This composite formulation leverages the complementary properties of each component: cationic surfactants provide decontamination capability, anionic surfactants provide foam stability, and amine oxide provides bridging functionality, resulting in a synergistic system that achieves multiple objectives
2Adaptability or versatility
If cationic surfactants are combined with anionic surfactants, then decontamination spectrum is broadened, but foam stability is destabilized due to hydrophobic complex formation
Solution Approach 1:
Amine oxide acts as a mediator that prevents the formation of unstable hydrophobic complexes between cationic and anionic surfactants. By forming soluble complexes with both types of surfactants, the amine oxide maintains compatibility in the aqueous phase, allowing the system to benefit from the broad decontamination spectrum of combined surfactants while preserving foam stability
Solution Approach 2:
The patent optimizes the concentration parameters of cationic surfactants, anionic surfactants, and amine oxide to specific ranges (e.g., cationic surfactant: 0.1-5%, anionic surfactant: 0.1-5%, amine oxide: 0.1-5%). This parameter optimization ensures that the system achieves broad decontamination coverage while maintaining foam stability by preventing excessive complex formation
3Reliability
If peroxidizing agents are used for decontamination, then destruction of toxic agents is improved, but foam stability may be affected
Solution Approach 1:
The amine oxide component in the patent serves as a stabilizing intermediary that protects foam structures from degradation by peroxidizing agents. By forming protective complexes with the peroxidizing agents and surfactants, the amine oxide prevents premature decomposition of foam bubbles while allowing the peroxidizing agents to effectively destroy toxic chemical agents
Solution Approach 2:
The patent specifies a pH range (7-11) and optimized concentrations for peroxidizing agents (0.1-20%) that balance decontamination effectiveness with foam stability. The alkaline buffer component also plays a role in maintaining pH conditions that favor both peroxidation reactions and foam stability
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 solution effectively decontaminates toxic agents while reducing blast effects, as demonstrated by its ability to break down simulated mustard gas, VX, and G products, achieving high decontamination rates and maintaining foam stability over time.
Implementation Method 1
the decontamination of toxic or bacteriological agents is carried out by reduction, oxidation or hydrolysis
Implementation Method 2
Toxic agents are broken down by a micellar catalysis reaction via microemulsions of the decontaminants which form in the presence of the cationic surfactant
Implementation Method 3
use a foam capable of absorbing the pressure generated by the shock wave of the explosion
Data Source
AI summary
The invention relates to a foaming decontaminating aqueous solution, characterized in that the latter contains, in weight relative to the total weight of the composition: - 0.1 to 20% of an organic or mineral water-soluble peroxidizing agent; - 0.05 to 20% of an anionic tensioactive agent; - 0.1 to 20% of an amine oxide; - 0 to 5% of a stabilizing agent for the peroxidizing agent; - 0 to 10% of an amphoteric tensioactive agent; - 0 to 15% of an alkaline buffer; and – the remainder of the 100% being water; said organic or mineral water-soluble peroxidizing agent being selected from:- the organic peracids of general formula R’-CO3H, where R’ is a linear or ramified alkyl group having 1 to 4 carbon atoms, preferably 1 to 3 carbon atoms, and the alkali metal, alkaline earth, ammonium, or hydroxylamine salts thereof; - the organic peracids of general formula HO3C-R’-CO3H, where R’ is a linear or ramified alkyl group having 1 to 4 carbon atoms, preferably 1 to 3 carbon atoms, and the alkali metal, alkaline earth, ammonium, or hydroxylamine salts thereof; - the organic peracids of general formula R” – (Φ) (CO3H)n(CO2H)m, where R” is a hydrogen or a linear or ramified alkyl group having 1 to 4 carbon atoms, (Φ) is a benzene ring, n=1 or 2; m=0 or 1, and the alkali metal, alkaline earth, ammonium, or hydroxylamine salts thereof; the mineral peroxides selected from the H2O2 adducts, persalts, mineral peracids, and alkaline salts thereof; - the mixtures of said peroxidizing agents; the pH of said aqueous solution being between 7 and 11. The invention can be used for dismantling explosive devices and decontaminating toxic and/or bacteriological agents contained in the former.