Emerging Technology

PFAS-free Textile Coatings

Glass system

By modifying the surface chemistry, researchers at Harvard have developed a coating technology that renders textiles water-repellent without harsh chemicals. (Image courtesy of Aizenberg Lab)

Fluorinated polymers, commonly referred to as PFAS, are used as surface coatings in a variety of common consumer products, such as cookware, food packaging, and textiles. These chemicals make products non-stick or water-repellant due to their ability to resist both oil and water. PFAS have been deemed “forever chemicals” because they persist in the environment and the human body for extended periods. Over time, these chemicals accumulate, contributing to environmental pollution and health issues like cancer and birth defects. This has led to a growing need for safer alternatives that offer similar properties without harmful effects. 

 

Drawing inspiration from nature, a team of researchers at Harvard has developed a novel coating technology that renders textiles water-repellent. This hydrophobic surface is created by altering the microscopic geometry of the fabric with nanoparticles and subsequently modifying the surface chemistry of those particles. The resultant fabric maintains its water-repellency in addition to its original properties—softness, appearance, flexibility, and breathability—through 65 washes. Furthermore, this process can also be modified to impart various properties to the material beyond hydrophobicity, including color, anti-fouling properties, and environmental responsiveness. The coating is agnostic to the substrate being modified, making it suitable for applications beyond textiles. 

 

Intellectual Property Status: Patent(s) Pending

Case Number: HU9469

Additional Information