Nano diamond coated fabric helps the wearer stay cooler

In tests, cotton fabric with a nano-diamond coating from RMIT University in Australia reduced the temperature by 2-3 degrees Celsius compared to untreated fabric.

The diamond-coated (left) and uncoated (right) sides of a cotton fabric. Photo: Cherry Cai/RMIT University

The world already has clothing materials that help keep wearers cool by allowing heat to dissipate. A team of scientists at RMIT University in Australia, led by Drs. Shadi Houshyar and Aisha Rehman, has developed a new experimental fabric coating with improved heat-reducing capabilities thanks to nanodiamonds, New Atlas reported on February 14. The new research was published in the journal Polymers for Advanced Technologies.

Unlike regular diamonds, nanodiamonds are inexpensive. They are nano-sized diamond particles that can be easily and inexpensively produced, and they have an internal "carbon lattice" structure similar to regular diamonds. This structure, along with several other factors, gives them excellent thermal conductivity.

In the new study, the team of experts mixed diamond powder with polyurethane and a solvent. Next, they applied the resulting solution to one side of a regular cotton fabric using an electrospinning technique.

Once dry, the solution forms a coating consisting of a network of nanofibers bonded to larger cotton fibers. If this fabric is used for clothing, the side coated with nanodiamonds will face the wearer's skin. The outer surface is uncoated to prevent the fabric from absorbing heat from the surroundings.

The team of experts placed the material samples with the uncoated side facing a nearly 100°C hot stove for 10 minutes, then removed them and allowed them to cool for another 10 minutes. They found that, compared to untreated cotton fabric samples, the diamond-coated fabric released 2-3°C more heat through the coated side during the cooling period.

Treated cotton fabric also offers better protection against ultraviolet rays. While its breathability and moisture-wicking properties aren't as good as untreated cotton, they are still within acceptable limits.

"A change of 2-3 degrees Celsius may not sound like much, but it makes a difference in comfort and has long-term health impacts. In fact, it could be the difference between turning the air conditioner on and off. Additionally, nanodiamonds also have the potential to be studied for their role in reducing building temperatures, benefiting the environment," Houshyar said.

Thu Thao (According to New Atlas )

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