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I want to be able to turn a filter on and off by electrically charging the filter so that it creates a temporary bond that blocks up the filter then, by discharging the filter, releasing the temporary bonds and allowing particles through again. Is this possible?

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  • $\begingroup$ This is what an N-95 mask does, but is always turned on. $\endgroup$ May 27, 2021 at 3:20
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    $\begingroup$ Yes, it's possible: en.wikipedia.org/wiki/Electrostatic_precipitator $\endgroup$
    – Buck Thorn
    May 27, 2021 at 6:09
  • $\begingroup$ You about 100 years late in applying for a patent ( gas phase). Cottrell precipitator is the first name that comes to mind. $\endgroup$ Feb 21, 2022 at 1:36

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In a sense, you can increase and decrease flow through an osmotic filter with electricity. The process is called electro-osmosis. This can even be used to create a pressure differential in the electroosmotic pump.

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