Udayavni Special

Novel coating to keep smartphones cool by sweating

PTI, Jan 23, 2020, 1:59 PM IST

Beijing: Inspired by the sweating mechanism in mammals, scientists have developed a new coating that can prevent smartphones and laptops from heating up by releasing water vapor.

The new thermal management method, described in the journal Joule, could keep electronics cooler compared to existing strategies by dissipating excess heat.

“The development of microelectronics puts great demands on efficient thermal management techniques because all the components are tightly packed, and chips can get really hot,” said Ruzhu Wang, from Shanghai Jiao Tong University in China.

“For example, without an effective cooling system, our phones could have a system breakdown, and burn our hands if we run them for a long time, or load a big application,” Wang said in a statement.

Larger devices such as computers use fans to regulate temperature, the researchers said.

However, fans are bulky, noisy, and energy-consuming, and thus unsuitable for smaller devices like mobile phones, they said.

Manufacturers have been using phase change materials (PCMs), such as waxes and fatty acids, for cooling phones, by absorbing heat produced by devices when the materials melt.

However, the total amount of energy exchanged during the solid-liquid transition is relatively low.

In contrast, the liquid-vapor transition of water can exchange 10 times the energy compared to that of PCM solid-liquid transition.

Wang and his team studied a group of porous materials that could absorb moisture from the air, and release water vapor when heated.

Among them, metal-organic frameworks (MOFs) were the most promising because they could store a large amount of water, and thus take away more heat when heated, the researchers said.

Previously, researchers have tried to use MOFs to extract water from the desert air.

However, MOFs are still really expensive, so large-scale application isn’t really practical.

“Our study shows electronics cooling is a good real-life application of MOFs. We used less than 0.3 grams of material in our experiment, and the cooling effect it produced was significant,” Wang said.

The researchers selected a type of MOFs called MIL-101(Cr) for the experiment because of its good water-absorbing capacity, and high sensitivity to temperature changes.

They coated three 16-square-centimeter aluminum sheets with MIL-101(Cr) of different thicknesses 198, 313, and 516 micrometers, respectively and heated them on a hot plate.

The team found that MIL-101Cr coating was able to delay the temperature rise of the sheets, and the effect increased with coating thickness.

While an uncoated sheet reached 60 degrees Celsius after 5.2 minutes, the thinnest coating doubled the time, and didn’t reach the same temperature until 11.7 minutes, the researchers said.

The sheet with the thickest coating reached 60 degrees Celsius after 19.35 minutes of heating, they said.

Udayavani is now on Telegram. Click here to join our channel and stay updated with the latest news.

Top News

Dubai’s newest Hindu temple to to open its doors for worshipers by Diwali next year

FinMin releases weekly instalment of Rs 6,000 cr to states meet GST shortfall

SS Rajamouli’s ‘RRR’ to release on October 13

Kannada Bigg Boss 3 fame Jayashree Ramaiah commits suicide

Modi the person through which Balakot information went to Arnab, alleges Rahul in TN

Ayodhya mosque may be named after 1857 mutiny warrior Maulvi Ahmadullah Shah

Disinformation being used to interfere in internal affairs of countries: India

Related Articles More

UK university scientists finalise nasal spray that blocks out COVID-19: Report

Krafton to launch two new games by 2022

‘Vaccinated people may still transmit Covid-19’

2 species of rare ant genus discovered in Kerala, Tamil Nadu

Immune system of recovered COVID-19 patients may evolve to fight SARS-CoV-2 variants says study


Mithun Shetty Hebri | Banana Farming information Guide for Beginners

Violators who set fire to crop and disconnected the power from pump set! | Udayavani

Swimming in Padmasana Posture | Gangadhar G Kadekar sets Record

The lorry driver’s disaster on the national highway: Hundreds of lives saved | Udayavani

Compol appeals people to share info regarding any untoward developments through Whatsapp

Latest Additions

Amarinder lays foundation stone of Jallianwala Bagh Centenary Memorial park

Biden to sign executive orders to promote ‘Made in America’ products

Dubai’s newest Hindu temple to to open its doors for worshipers by Diwali next year

Beltangady: Staff of hotel owned by local BJP leader attacked by a gang, six arrested

FinMin releases weekly instalment of Rs 6,000 cr to states meet GST shortfall

Thanks for visiting Udayavani

You seem to have an Ad Blocker on.
To continue reading, please turn it off or whitelist Udayavani.