Image Source: Wikipedia
Silk has been modified by the addition of Nano-particles to reflect 95 percent of sunlight, which means the material stays extra cool on a hot day.
Jia Zhu at Nanjing University in China and Shanhui at Standford University and their technologist’s colleagues were inspired by silk, which feels cool against the skin because it reflects most of the sunlight that strikes it mainly the infrared and visible wavelengths, and rapidly radiates heat.
Fabric made of engineered silk keeps skin about 12.5 °C cooler than cotton clothing and provides relief from hot weather. Approximately, 15 percent of global electricity goes towards keeping us cool. To descend this energy demand, scientists have been searching for passive ways of cooling us that don’t require electricity.
When the researchers ran an experiment on this engineered silk in daylight, they discovered that it stayed 3.5°C cooler than the encompassing air due to its capacity to minor most daylight and radiate warmth. It is the very first cloth to be developed that stays colder than the surrounded air when in daylight.
Image Source: New Scientists
The researcher discovered also that after they draped the engineered silk over a floor designed to simulate pores and skin, it stored the pores and skin 8°C cooler below direct daylight than pure silk did and stored the pores and skin 12.5°C cooler than cotton did. The simulated pores and skin was manufactured from silicone rubber that was wrapped around a heater to copy physique heat.
The ultimate part of their experiments, they made a collared long-sleeved shirt from the engineered silk and experimented with it on a volunteer. In the experiment, the volunteer put on the shirt and stand out in solar on a 37°C day. Infrared photographs showed that the shirt stayed cool. Compared to infrared photographs captured of the volunteer sporting shirt manufactured from pure silk or cotton confirmed that these materials warmed up. The engineered silk is sung to put on without any breathing issues and it could be washed and dried repeatedly without falling aside. Other than that it is cost-effective to make and may very well be mass-produced.