Take the pledge to vote

For a better tommorow#AajSawaroApnaKal
  • I agree to receive emails from News18

  • I promise to vote in this year's elections no matter what the odds are.
  • Please check above checkbox.

    SUBMIT

Thank you for
taking the pledge

Vote responsibly as each vote counts
and makes a diffrence

Disclaimer:

Issued in public interest by HDFC Life. HDFC Life Insurance Company Limited (Formerly HDFC Standard Life Insurance Company Limited) (“HDFC Life”). CIN: L65110MH2000PLC128245, IRDAI Reg. No. 101 . The name/letters "HDFC" in the name/logo of the company belongs to Housing Development Finance Corporation Limited ("HDFC Limited") and is used by HDFC Life under an agreement entered into with HDFC Limited. ARN EU/04/19/13618
LIVE TV DownloadNews18 App
News18 English
»
2-min read

All Weather Sweater: This Fabric Adapts Your Surroundings To Keep You Comfortable

This new fabric lets you stay warm or cool depending on the weather outside!

PTI

Updated:February 12, 2019, 3:03 PM IST
facebookTwitterskypewhatsapp
All Weather Sweater: This Fabric Adapts Your Surroundings To Keep You Comfortable
This new fabric lets you stay warm or cool depending on the weather outside!
Loading...

Scientists have created a fabric that can automatically regulate the amount of heat that passes through it, helping a person stay cool or warm depending on the weather conditions.

When conditions are warm and moist, such as those near a sweating body, the fabric allows heat to pass through. When conditions become cooler and drier, the fabric reduces the heat that escapes, researchers said.

The researchers from University of Maryland in the US created the fabric from specially engineered yarn coated with a conductive metal.

This is first textile shown to be able to regulate heat exchange with the environment, according to the study published in the journal Science.

Under hot, humid conditions, the strands of yarn compact and activate the coating, which changes the way the fabric interacts with infrared radiation.

They refer to the action as "gating" of infrared radiation, which acts as a tune-able blind to transmit or block heat.

"This is the first technology that allows us to dynamically gate infrared radiation," said YuHuang Wang, a professor at University of Maryland.

The base yarn for this new textile is created with fibres made of two different synthetic materials -- one absorbs water and the other repels it.

The strands are coated with carbon nanotubes, a special class of lightweight, carbon-based, conductive metal. Since materials in the fibres both resist and absorb water, the fibres warp when exposed to humidity such as that surrounding a sweating body.

That distortion brings the strands of yarn closer together, which opens the pores in the fabric. This has a small cooling effect because it allows heat to escape.

It also modifies the electromagnetic coupling between the carbon nanotubes in the coating, researchers said.

"You can think of this coupling effect like the bending of a radio antenna to change the wavelength or frequency it resonates with," Wang said.

"It's a very simplified way to think of it, but imagine bringing two antennae close together to regulate the kind of electromagnetic wave they pick up," he said.

"When the fibres are brought closer together, the radiation they interact with changes. In clothing, that means the fabric interacts with the heat radiating from the human body," he added.

Depending on the tuning, the fabric either blocks infrared radiation or allows it to pass through. The reaction is almost instant, so before people realize they're getting hot, the garment could already be cooling them down.

On the flip side, as a body cools down, the dynamic gating mechanism works in reverse to trap in heat.

"The human body is a perfect radiator. It gives off heat quickly," said Min Ouyang, a professor at University of Maryland.

"For all of history, the only way to regulate the radiator has been to take clothes off or put clothes on. But this fabric is a true bidirectional regulator," Ouyang said.

Get the best of News18 delivered to your inbox - subscribe to News18 Daybreak. Follow News18.com on Twitter, Instagram, Facebook, TikTok and on YouTube, and stay in the know with what's happening in the world around you – in real time.

Subscribe to Moneycontrol Pro and gain access to curated markets data, trading recommendations, equity analysis, investment ideas, insights from market gurus and much more. Get Moneycontrol PRO for 1 year at price of 3 months. Use code FREEDOM.

Read full article
Loading...
Next Story
Next Story

Also Watch

facebookTwitterskypewhatsapp

Live TV

Loading...
Countdown To Elections Results
To Assembly Elections 2018 Results