Chalk-Coated Fabrics: A Cool Solution for Urban Heat

**Innovative Temperature-Reducing Fabric Coating:** As climate patterns change, the demand for clothing materials that can effectively reduce heat sensation increases, particularly in urban settings where temperatures tend to remain high. Researchers Evan D. Patamia, Megan K. Yee, and Trisha L. Andrew have engineered a polymer-mineral coating for fabrics that promises significant cooling effects. Presented initially at ACS Fall 2024, this technology involves a chalk-based coating applied to polyester poplin fabric, which can reduce perceived temperatures by up to 15°F compared to untreated materials. **Expanded Testing and Results:** The latest findings, published in the journal ACS Applied Materials & Interfaces, expand upon preliminary tests by using outdoor urban environments for assessments. The testing involved four different settings: - An open grass field, where it averaged 6°F below ambient temperatures - A concrete-paved alley, resulting in 3°F cooler air - An asphalt-paved parking lot, where the effect was a 1°F reduction - An open concrete veranda, showing a 3°F drop These results are particularly relevant for urban dwellers, cyclists, and pedestrians who often face the challenge of navigating hot city environments without reliance on air conditioning. **Research Funding and Future Outlook:** This research project received support from an Interdisciplinary Research Grant by the College of Natural Sciences at the University of Massachusetts Amherst. With such promising outcomes, this fabric coating could eventually find broad applications, offering energy-free cooling solutions that align with sustainability goals.