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Environment, Architecture

A "chameleon" material can heat and cool buildings

The material that changes color and temperature: a "chameleon" in the form of an economical and sustainable building material for buildings.

January 29 2023
Gianluca RiccioGianluca Riccio
⚪ 3 minutes
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An innovative building material with properties similar to those of a chameleon is capable of changing colour, but not only. It can also change the amount of heat it absorbs or releases depending on the outside temperature.

During hot days, this material is capable of releasing up to 92% infrared heat which it retains, helping to keep the inside of a building cool. In winter, however, the material it only emits 7% of its infrared, helping to keep the building warm.

A material that behaves like a person

"We've created an energy-efficient method of managing the temperature of buildings. An approach similar to what a person would take. A person who puts on an extra layer when it's cold and takes one off when it's hot," explains l 'Assistant Professor Po-Chun Hsu of the University of Chicago.

This type of smart material allows us to maintain a comfortable temperature in buildings without having to use large quantities of the energy.

Chameleon

How the chameleon material is born

The nonflammable building material created by Hsu and colleagues is "electrochromic." What does it mean? It contains a layer that can take two shapes: solid copper that retains most of the infrared heat or an aqueous solution that emits infrared.

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A device connected to it uses a small amount of electricity to induce chemical shifting between states by depositing the copper in a thin film or by removing it.

In their paper (that I link to you here), the researchers detailed how the device can rapidly and reversibly switch between the metallic and liquid states. The ability to switch from one conformation to another remained effective even after 1.800 state transitions.

What performance are we talking about?

The researchers developed scenarios to demonstrate how their material could reduce energy costs in buildings in different cities.

According to their calculations, the use of electricity to activate the electrochromic changes of the chameleon material would be less than 0,2% of total consumption of electricity of the building. But it could save you money 8,4% of annual energy consumption.

Chameleon material: next steps

Hsu's team has so far only produced chunks of material around 6cm in diameter, but they have ambitions to use these shards to create ever-larger panels.

Among the next steps, the researchers are evaluating the possibility of customizing the material with different chromatic shades. The "aqueous phase" is transparent and would allow a wide range of colors to be used without compromising the chameleon material's ability to absorb infrared rays.

I can't wait for engineers and construction professionals to perfect this discovery: these are the solutions for a more sustainable future

Tags: buildingsustainability


GPT Chat Megaeasy!

Concrete guide for those approaching this artificial intelligence tool, also designed for the school world: many examples of applications, usage indications and ready-to-use instructions for training and interrogating Chat GPT.

To submit articles, disclose the results of a research or scientific discoveries write to the editorial staff

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