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Anyone know how to make a microbubble generator? Answered

I've been seeing a lot of info about microbubbles lately. These bubbles are being used for many applications ranging from cleaning polluted water to washing both pets and people without the use of soap or detergents. Anyone have any ideas how to do this DIY without having to pay thousands for these devices?



4 years ago

Any ebay ultrasonic cleaner creates microbubbles for under $50.

At one time ultrasonic generators used magneto-restriction to dimensionally change a metallic object and create these microbubble. A circuit is included below.


fish aerators sometimessend o2 thru a stone with fine pores. tiny bubbles.

wiki indicates that microbubbles need a lipid(fat) to keep em from dissolving. wiki, therefore grain o salt.

you might want high volume lo pressure compressor. such are used for some paintguns

Maybe sand in a filter bag so it can not leak out. Put that in a can with holes to pass air.
Place in water blow air into sand.

"Micro-bubble" is the ultra-fine bubbles. The diameter of the bubbles in the foam upon occurrence refers to the small bubbles of about 50 microns or less the number of micrometers to in general. For example, the thickness of human hair (diameter) it is about 70 micrometers, and that of a microbubbles is still smaller than the thickness of a human hair. Collection of microbubbles in liquid form can be seen in hazy white color.


As I understand it, one would need a tube with a porous section in it. This would run within a second section of tube with seals at either end such that the porous section of the first tube would be within an annular chamber. Compressed gas would be fed into the annular chamber whilst your working fluid is pumped through the inner tube. That is the easy bit. The bubble size is going to depend primarily (I think) on the pore size of the porous section. This in turn will probably dictate the range of the gas pressure required. You will then have to mess with working fluid flow rate & back pressure. It will be a bit of a juggling act but with a bit of thought and a lathe it should be possible to put something together. The porous section of tube might be a first hurdle. Many years back I used a section of microporous PTFE to REMOVE bubbles from a flow stream :-).

A quick doodle:


I have heard of using microbubbles and microcapsules in medical applications and as a colouring additive in paints but not for cleaning. For the cases I know of there is no simple way of making these (yet). The problem is that the forces on that level are very difficult to control and require specialised techniques and equipment to allow production of stable spheres.

I know people who do research in the area but they are of course not allowed to talk about the methods they use. I imagine using some kind of extremely fine emulsion polymerisation using a monomer with both polar and non polar ends (maybe in a ultrasonic bath to minimise the emulsion) might create a sphere of suitable size. Adjusting it for a specific application or functionality might be an additional hurdle.

Sorry I can't be of further help.

Thank you for your assistance. It sheds some light on what I might be possible. Thanks again.