Scientists Develop "Smart" Patch That Speeds Healing of Chronic Wounds

Researchers at Hanyang University in South Korea have developed a next-generation smart medical patch that changes shape at body temperature while accelerating the healing of chronic wounds.

The study, published in the journal Advanced Materials, addresses the challenge of chronic wounds, particularly in people with diabetes, whose tissue repair is often impaired by persistent inflammation, infection, and reduced regenerative capacity. Conventional wound-closure methods—including sutures, staples, and tissue adhesives—primarily bring wound edges together mechanically but do not actively promote the biological healing process.

The newly developed patch consists of a 4D-printed microneedle system that is activated at 37°C (98.6°F) and adapts its shape to the surrounding tissue. Once applied, the patch bends to improve contact with the wound, helping to close the damaged tissue more effectively. It also incorporates a controlled drug-delivery system and antibacterial components.

A key innovation of the technology is its integration of artificial intelligence, machine learning, biomimicry, and DNA nanotechnology. The researchers used AI algorithms to predict the material's behavior and optimize its structure, significantly reducing the need for trial-and-error experimentation. A Gaussian Process Regression model proved particularly effective at predicting how changes in the material's composition and architecture would affect its shape-changing properties.

For inspiration, the team turned to the carnivorous Cape sundew (Drosera capensis), a plant that captures prey through coordinated movements and sticky surfaces. These natural principles were translated into the engineering design of the patch, allowing it to self-organize and adapt after coming into contact with living tissue.

Laboratory tests showed that the microneedles rapidly recovered their programmed shape at body temperature, maintained stable contact with injured tissue, and promoted faster wound closure than conventional approaches. The system also provided controlled release of regenerative DNA nanoparticles and demonstrated strong antibacterial activity against Escherichia coli and Staphylococcus aureus.

In preclinical studies, the technology accelerated wound healing and improved tissue regeneration. According to lead researcher Hyun-Do Chun, one of the study's most significant achievements was not only the development of a biomimetic medical device but also the successful use of artificial intelligence to transform biological principles into a predictable and programmable therapeutic platform.

Although additional research is needed before the technology can be used in clinical practice, the researchers believe it could serve as the foundation for a new generation of smart biomedical devices, including wound-healing patches, implants, and biocompatible scaffolds capable of adapting to the body's environment and actively supporting the healing process.