Home SECURITY Nanodiamond “thermal highways” cool electronics and dissipate heat four times more efficiently

Nanodiamond “thermal highways” cool electronics and dissipate heat four times more efficiently

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Nanodiamond “thermal highways” cool electronics and dissipate heat four times more efficiently

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Nanodiamond “thermal highways” cool electronics and dissipate heat four times more efficiently

Scientists have developed a film of nanodiamonds and polyvinyl alcohol that effectively removes heat from compact devices.

Research group developed a nanocomposite film that dissipates heat four times more efficiently than existing materials, offering a potential solution for overheating compact electronics. This was achieved using a two-component coaxial electrofiber method creating a heat distribution “pipeline” using polyvinyl alcohol and a thermally conductive nanodiamond material.

As smart electronic devices get smaller and more powerful, they can generate a lot of heat, resulting in reduced processing speed and sudden shutdowns. In a paper published in the journal ACS Applied Nano Materials, scientists are using an electrofiber approach to produce a new nanocomposite film. In tests, the film dissipated heat four times more efficiently than similar materials, indicating that it could be used to cool electronics in the future.

The shrinking and smartening of electronics has revolutionized many aspects of life, from communications to medicine. But shrinking means these devices concentrate heat in smaller areas, which can slow down computing speeds and even force devices to shut down to prevent damage. To dissipate this heat, researchers are turning to nanocomposite materials that contain a flexible polymer and a thermally conductive filler.

A simple way to make nanocomposites is with electrofiber, in which a solution of polymer and filler is ejected from a syringe through an electrically charged nozzle, forming fibers that fold into a thin film. Although simple, single-solution or single-axial electric fibers make it difficult to control material properties. Therefore, Jinhong Yu, Sharorong Lu and their colleagues used a two-component method called coaxial electric fiber to better control the design of the fibers and improve the heat dissipation of the new nanocomposite.

The researchers made one solution with a polymer of their choice, polyvinyl alcohol, and a separate solution with a thermally conductive filler, a nanodiamond material, to produce a new nanocomposite. By placing a syringe with each solution on a nozzle that combined the two solutions, the researchers obtained fibers with a polyvinyl alcohol core and a nanodiamond coating, rather than a random distribution of the two components. The team says the coated fibers act as a “pipeline” to channel heat, like traffic, along and across the fibers throughout the film.

In tests, the new materials dissipated heat better than those made with traditional packing and were four times more thermally conductive than previously reported nanocomposites. According to the researchers, these films could be used in the future to cool miniature electronics.

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