Sweat strengthens new skin-safe adhesive for medical devices

Researchers at Texas A&M University have developed a novel skin-safe adhesive for wearable medical devices that improves its grip when exposed to sweat, addressing common issues of skin irritation caused by traditional adhesives. This new adhesive is based on polyelectrolyte complexes (PECs), water-based materials that bond gently to the skin and reduce rashes, redness, and inflammation often triggered by solvent-based adhesives used in current glucose monitors, heart rate trackers, and other health devices. Unlike conventional adhesives made from acrylates or methacrylates, the PEC adhesive’s performance actually improves with moisture, making it particularly suitable for long-term wear. Led by Dr. Jaime Grunlan, the research team demonstrated that the salt content in sweat enhances the adhesive strength of PECs, matching the effectiveness of commercial products like 3M Tegaderm without causing discomfort. This discovery builds on previous work with PEC coatings for industrial applications and extends their use into biomedical devices, potentially benefiting patients with chronic conditions such as diabetes and