Cuprous Iodide Filter Coating for Oxidizing Gas Inactivation
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Solution Overview
Problem
Existing personal respiratory protection devices, such as face masks and air filters, are ineffective in capturing oxidizing gases and non-particulate toxic volatile compounds, leaving individuals exposed to harmful air pollutants like nitrogen dioxide, sulfur dioxide, and ozone, which contribute to cardiovascular and respiratory diseases.
Innovation Solution
A pollutant-inactivating composition comprising cuprous iodide and iron phthalocyanine in a polymeric matrix, preferably polyvinylpyrrolidone, applied to textiles or filters, which neutralizes oxidizing gases by trapping molecular iodine and retaining moisture to enhance activity, allowing for effective inactivation of toxic air pollution constituents at ambient temperatures without the need for bulky canisters or elevated temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical filtration is used to capture particulate matter, then particle removal efficiency is improved, but protection against oxidizing gases and non-particulate toxic compounds deteriorates
Solution Approach 1:
The patent applies composite materials by combining mechanical filtration layers with chemically active layers containing cuprous iodide and iron phthalocyanine. This composite structure enables simultaneous particle capture through mechanical means and gas neutralization through chemical reactions, resolving the contradiction between particle removal efficiency and protection against oxidizing gases.
Solution Approach 2:
The patent implements multi-functionality by designing a single filtration system that performs both particle capture and gas neutralization. The filter media incorporates multiple active components (cuprous iodide for oxidizing gases, iron phthalocyanine for carbon monoxide and volatile organic compounds) alongside mechanical filtration capabilities, allowing one device to address multiple harmful factors simultaneously.
2Object-affected harmful factors
If chemical neutralization agents are added to inactivate toxic compounds, then protection against oxidizing gases is improved, but device complexity increases
Solution Approach 1:
The patent employs porous materials as the substrate for incorporating chemical neutralization agents. The porous structure allows integration of multiple chemical components (cuprous iodide, iron phthalocyanine) within the filter matrix while maintaining breathability and airflow. This approach enables chemical neutralization functionality without significantly increasing device complexity, as the porous material serves as both structural support and chemical carrier.
3Productivity
If bulky canisters or elevated temperatures are used for neutralization, then inactivation efficiency is improved, but ease of operation deteriorates
Solution Approach 1:
The patent implements self-service by designing a system where the chemical neutralization agents (cuprous iodide and iron phthalocyanine) automatically react with toxic gases upon contact, without requiring external energy input, temperature control, or bulky containment structures. The reactions proceed at ambient conditions, enabling efficient inactivation while maintaining mask portability and comfort for continuous wear.
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 composition rapidly inactivates significant amounts of toxic air pollution constituents, including nitrogen dioxide and sulfur dioxide, during a single passage through the mask or filter, significantly reducing health hazards associated with air pollution exposure, such as cardiovascular and respiratory diseases, and exacerbation of asthma and allergic reactions.
Implementation Method 1
The compositions and methods of the disclosure provide a means of rapidly neutralizing oxidizing gases including nitrogen dioxide without requiring elevated temperatures or bulky canisters containing adsorbents
Implementation Method 2
A pollutant-inactivating composition of the disclosure, in some embodiments, is applied to a textile or filter materials to inactivate air pollution constituents passing through the textile material
Implementation Method 3
The pollutant-inactivating composition also additionally comprises, in some embodiments, a humectant or hygroscopic agent to capture and retain moisture in the active filter matrix
Data Source
AI summary
The present invention relates to a composition, textile, and mask for reducing the inhalation of pollutants. The composition includes an aqueous solution of an inorganic iodide compound, a metal phthalocyanine, and a polymeric binder. The inorganic iodide can be cuprous iodide, the metal phthalocyanine can be iron phthalocyanine, and the polymeric binder can be polyvinylpyrrolidone or polyvinyl alcohol. This pollutant-inactivating composition neutralizes pollutants such as nitrogen dioxide, sulfur dioxide, ozone, volatile organic compounds and other unpleasant airborne agents, without requiring elevated temperatures or bulky canisters containing adsorbents. Optionally, a humectant can also be incorporated into the coating solution to retain moisture in the active filter matrix, which enhances the activity of the composition to inactivate oxidizing gases and other toxic constituents of air pollution.