Localized heme capture and controlled oxidation for menstrual color reduction
A dry-stored, fluid-triggered treatment for absorbent cores that reduces menstrual color by locally releasing hemoglobin from red blood cells, capturing it on a pigment-binding carrier, and oxidizing it in a porous zone engineered to restrict catalase. Designed for integration below the topsheet, with component-level validation and safety-first development.
Overview
This research program is developing a dry-stored, fluid-triggered treatment for absorbent cores that reduces the visible color of menstrual fluid. The approach combines localized red-cell disruption, hemoglobin capture, and controlled peroxide-mediated oxidation inside a confined porous zone. The goal is to limit pigment mobility and degrade heme before it transfers to the topsheet, while restricting catalase—the enzyme in blood that breaks down peroxide—and minimizing skin-facing migration of reactive ingredients.
The potential value is a built-in color-reduction function for feminine hygiene products. The treatment is designed to sit below the topsheet during core construction, keeping active ingredients and particles away from skin contact.
Technical specifications
Proposed mechanism:
- A locally dosed surfactant disrupts red-cell membranes to release hemoglobin.
- A porous capture zone admits hemoglobin while restricting catalase access via size or affinity selectivity, without chemical inhibitors.
- An immobilized pigment-binding carrier captures heme and reduces pigment mobility.
- A separately stored peroxide source activates on fluid contact to drive controlled oxidative degradation of heme and residual color.
Design constraints under investigation:
- Small antioxidants, peroxide leakage, and colored oxidation products must be controlled.
- Protein selectivity, useful peroxide exposure, and skin-facing migration must be demonstrated in blood-containing fluid.
- Formulations requiring harmful exposure are rejected; safety and performance are evaluated together.
Planned development path:
- Months 1–3: validate localized red-cell disruption, porous capture-zone selectivity, and true color reduction versus capture alone and unprotected oxidation.
- Months 4–6: integrate selected components into absorbent cores and develop dry-stable, fluid-triggered delivery; evaluate rewet, color persistence, repeated wetting, and storage.
- Months 7–9: validate on representative absorbent constructions, assess exposure and compatibility, and deliver a prototype with manufacturing and cost assessment.
Technology readiness level
Early-stage development hypothesis. The underlying science is supported by the group’s published work on responsive microcapsules, enzyme-mediated pigment oxidation, and heme-protein characterization, but adaptation to a passive menstrual pad and blood-containing fluid is not yet demonstrated. Catalase restriction and safe localized lysis remain explicit development hypotheses, not product claims. Success requires establishing pigment entry, catalase restriction, and net color reduction before full-system integration.
About Cornell University
Cornell University is a comprehensive private, land-grant research university with campuses in Ithaca and New York City, combining significant scale with cross-disciplinary breadth. Industry connects through open-access user facilities and prototyping labs, pilot-scale testbeds, and a research and technology park that provide pathways from discovery to demonstration. A statewide extension network and integration with a major hospital system enable real-world deployment, while a graduate campus embedded in New York City’s tech corridor provides direct access to startups, venture investors, and corporate R&D teams. Research is supported by competitive federal funding from agencies such as the National Science Foundation, National Institutes of Health, the Department of Energy, and the U.S. Department of Agriculture. A dedicated technology transfer office streamlines IP management, licensing, startup formation, and corporate partnerships across campuses.
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