Revolutionary Fabric Coating to Combat Heat
Scientists have developed a revolutionary new fabric coating that could offer much-needed relief from scorching summer temperatures. Researchers at the University of Massachusetts Amherst have created an innovative coating made from a chalk-based material that can reduce the temperature of the air beneath treated fabric by up to 8°F.
Innovative Cooling Technology
For years, scientists have been developing textiles that block sunlight and release body heat through radiative cooling, using synthetic particles or organic polymers. However, scaling up production in a sustainable manner remains a challenge. To address this, the researchers developed a coating using natural minerals—calcium carbonate and barium sulfate, which are commonly found in chalk—to achieve similar cooling effects.
How the Coating Works
Calcium carbonate particles effectively reflect visible and near-infrared light, while barium sulfate particles are adept at reflecting ultraviolet light. The researchers devised a simple, eco-friendly method to apply these coatings by first applying a polymer layer to fabric squares, then dipping them into solutions containing calcium or barium ions, resulting in a chalky, matte finish.
Testing the Cooling Effectiveness
To evaluate the cooling performance of both treated and untreated fabrics, the team conducted outdoor tests on a sunny day with temperatures exceeding 90 degrees Fahrenheit (32 degrees Celsius). Remarkably, the treated fabric was able to cool the air beneath it by 8 degrees Fahrenheit compared to the ambient air temperature in the mid-afternoon. The press release also highlighted that the treated fabric created a maximum temperature difference of 15 degrees Fahrenheit compared to the untreated fabric, which warmed the air beneath it.
Potential Applications and Benefits
This chalk-based coating could enhance comfort, reduce energy consumption, and help prevent heat-related illnesses in applications such as clothing and building materials. By offering a sustainable alternative to air conditioning, this innovation presents a timely solution as global temperatures continue to rise due to climate change.
