Absorbent seaweed-based flushable tablets for menstrual hygiene products
McMaster University researchers have developed a biodegradable, seaweed-based absorbent tablet that integrates into menstrual cups. This innovation simplifies cup use by preventing spills during removal and reducing hygiene concerns, while also providing a scalable platform for future, non-invasive wearable health diagnostics, such as infection monitoring.
Overview
Researchers at McMaster University have developed an innovative, seaweed-based absorbent tablet designed to improve the usability and adoption of menstrual cups. By integrating these flushable, biodegradable tablets into existing menstrual cup designs, the solution addresses one of the primary barriers to cup adoption: the difficulty and hygiene concerns associated with cup removal and spillage. This technology represents a significant step forward in making sustainable menstrual health products more accessible, convenient, and dignified for users globally.
Technical specifications
The solution features a high-performance, biodegradable, and flushable tablet composed of superabsorbent, cross-linked alginate fibers derived from seaweed. Key capabilities and specifications include:
- High absorption capacity: Optimized to absorb 8 mL of water or 15 mL of blood per gram of fiber within 8 hours.
- Spill management: Retains menstrual blood volume equivalent to the full capacity of a menstrual cup, effectively eliminating spillage during removal.
- Material safety: Engineered from biocompatible materials, ensuring safe use.
- Compatibility: Designed to complement existing lubricant-infused silicone menstrual cups, which exhibit self-cleaning properties, reduce bacterial adhesion, and minimize biofilm formation.
- Future scalability: The platform architecture supports the future integration of diagnostic sensors to monitor biomarkers for reproductive health, infections, and other conditions.
Technology readiness level
The technology is currently at a TRL 4-5 stage. The material has been successfully developed, characterized for absorption capacity and biocompatibility in laboratory settings, and described in peer-reviewed publications including ACS Applied Materials and Interfaces. Ongoing research is actively exploring the integration of diagnostic capabilities, such as bacteriophage-based sensing, to transition the platform into a broader...
About McMaster University
McMaster University is a comprehensive, research‑intensive public university in Hamilton, Ontario, known for collaborative, problem‑driven scholarship and strong partnerships with healthcare and industry. A research and technology park adjacent to campus co‑locates corporate R&D with faculty labs, while an established engineering co‑op connects companies with talent and applied expertise. Deep integration with regional hospital systems enables clinical trials, real‑world evidence generation, and translational studies at scale. Research is supported by competitive funding from NSERC, CIHR, SSHRC, and the Canada Foundation for Innovation. A dedicated technology transfer office streamlines IP strategy, contracting, and commercialization for industry partners.
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