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Selectively Permeable Membrane

  1. Sep 24, 2009 #1
    Is it possible to create an artifical selectively permeable membrane? I need one for a science fair project idea I had.
     
  2. jcsd
  3. Sep 25, 2009 #2

    Andy Resnick

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    Selectively permeable *for what*?

    Dialysis filters are selectively permeable. Any mechanical filter is selectively permeable. Put some charge on the filter and it's also selective for charged solutes.

    Can we make a filter that is permeable only to Na+, for example? I don't think so.
     
  4. Sep 25, 2009 #3
    Selectively permeable for either positve or negative molecules. I need the membrane to cause osmosis.
     
  5. Sep 25, 2009 #4

    Andy Resnick

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