Self-healing reverse filter allows large particles through, but excludes smaller particles and gases.
Credit: Tak-Sing Wong/Birgitt Boschitsch, Penn State
A self-healing membrane that acts as a reverse filter, blocking small particles and letting large ones through, is the “straight out of science fiction” work of a team of Penn State mechanical engineers. “Conventional filters, like those used to make coffee, allow small objects to pass through while keeping larger objects contained,” said Birgitt Boschitsch, graduate student in mechanical engineering.
She and the research team, however, developed the exact opposite, a stabilized liquid material that screens out smaller objects while allowing larger ones to pass through.
The team experimented with liquids for their unique properties...
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