Penn State Engineers and Surgeons Develop Tunable Aerogel Biomaterial to Accelerate Blood Vessel Growth in Chronic Wounds

Penn State researchers develop granular aerogel scaffolds that allow precise control over pore size to speed up blood vessel growth and tissue regeneration.

By: AXL Media

Published: Mar 11, 2026, 5:55 AM EDT

Source: The information in this article was sourced from Penn State

Engineering Programmable Pathways for Tissue Recovery

A collaborative effort between the Penn State College of Medicine and the Department of Chemical Engineering has resulted in a sophisticated class of biomaterials known as Granular Aerogel Scaffolds. These materials are specifically designed to address a long standing limitation in regenerative medicine: the inability to precisely control the size and connectivity of internal pores. Because traditional biomaterials often lack the necessary architecture to transfer oxygen and nutrients efficiently, they can fail to support the regeneration of muscle, nerve, and skin tissue. Corresponding author Amir Sheikhi explained that by using protein based microparticles as adjustable building blocks, the team can now program the geometric pathways that cells use to migrate and integrate with surrounding biological structures.

Overcoming the Structural Limitations of Traditional Aerogels

Aerogels are prized in engineering for being ultralight and oxygen rich, but their application in healthcare has historically been restricted by structural instability. Conventional versions of these "frozen smoke" materials often suffer from pore collapse during the drying process or lack the necessary cellular scale precision required for medical use. The new granular approach developed at Penn State allows researchers to adjust the pore size without compromising the overall stiffness of the material. This structural integrity ensures that the scaffold remains a stable environment for cell colonization, providing a reliable framework that can withstand the physiological pressures of the human body while maintaining maximum surface area for nutrient exchange.

Addressing the Critical Need for Rapid Vascularization

For any implanted biomaterial to be clinically successful, it must undergo a process called vascularization, where new blood vessels grow into and alongside the material. Dino Ravnic, a professor of surgery at Penn State, noted that if a material cannot interface with the circulatory system, tissue repair becomes impossible, often leading to secondary infections or the need for reoperation. This is a particular challenge for "at risk" patient populations, such as those with diabetic wounds, irradiated tissue, or severe burns, where oxygen levels are naturally low. The aerogel scaffolds offer a promising alternative by c...