Ultra smooth SLIPS (Slippery Liquid Porous Surfaces) developed at Harvard University could be used to keep freezers frost free (Photo: Kate Sheets via Flickr)
SLIPS self-cleaning carbon dust with a droplet of ethanol
Crude oil completely wicked from SLIPS without leaving a stain
Aluminum surface with nanostructured polymer layer subsequently converted into a slippery liquid-infused porous surface (SLIPS)
Although advances in refrigeration technology means we don’t need to defrost the freezer as often as we used to, many of us are still forced to carry out the task on a regular basis lest we find the frosty walls closing in to claim that tub of ice cream. Now a team from Harvard University has developed ultra smooth slippery surfaces that prevent ice sheets from developing by allowing even tiny drops of condensation or frost to simply slide off. As well as keeping freezers frost-free, the technology could be used to prevent ice build up on metal surfaces in wind turbines, marine vessels, and aircraft.
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