What about another liquid? Is there a “perfect” cleaner, something that spreads and penetrates like nothing else?
Very interested in the answer.
- You seem to be assuming that a perfectly tensionless water would make for a superior cleaner, but there’s no reason to assume that would be true. Lowering surface tension is not the sole reason that soap is a good cleaner.
- I have no idea if water can be made perfectly tensionless, but that’s what dishwasher rinse-aids are for: to make the water molecules stick to each other less, so they evaporate more quickly & easily. If You Want Drier Dishes, Use Dishwasher Rinse Aid
The soap makes water wetter things was from a Bill Nye episode. I mean he really simplified it for a kids science show. There’s a bit more going on with soap than simply the surface tension being reduced. You’ve got emulsifier, surfactants, etc.
I don’t think reducing surface tension alone will make a better cleaner.
soap allows to dissolve fats in small droplets of soap (micelles). Surface tension arises from affinity to the surface, like oil still doesn’t like teflon pans, despite being hydrophobic. So no, you can’t find one size fits all liquid. (Aside from supercritical fluids, but they require pressures - and sometimes are used in dry cleaning! so this might be your answer)
The only liquid we’ve discovered with no surface tension is helium. And only at or below specific temperatures depending on the type of helium.
Very unlikely water would ever get to that state.
Water has hella intermolecular attraction, unlike noble gases. That’s why even really heavy noble elements are in the gas state at room temperature and pressure
Interesting question. It’d be really neat if you could spray your car with something and have it slide off bringing all of the dirt and dust with it. No need to rinse, even. Hopefully it won’t ruin your driveway in the process.
Water and soap has one giant advantage at this point, which is volume. In most populated places water is plentiful.
It would have to distinguish between dirt and dust and clear coat, paint, primer, and metal.
https://en.m.wikipedia.org/wiki/Surfactant
The surface tension of water is due to the molecular bonds. It’s unlikely to change because then it would no longer be water.
The chemical properties that create surface tension help water become a great solvent for a variety of chemicals. There isn’t a chemical that wouldn’t have surface tension that would also be as good a solvent in that class of materials.
So could we produce a surface tension-free water?
Homie dats a gas. Or supercritical fluid, which actually is indeed used for “washing” (SC CO2 is used to decaffeinate coffee). However, like others said, surface tension /= cleaning ability. Part of what soap does is increase the effective solubility of things that are not normally soluble.
Huh!
Soap works by attaching one side of molecule to the grease and one side to the water to pull dirt out of something, surface tension is not the only thing helping
Water isn’t wet though.
STOOOOOOOOOOOOP RIGHT THERE! I see you hovering over that reply button. That’s right, YOU! This is a TRAP that will RUIN your productivity (ironic, isn’t it?) I can’t stop you from typing that reply, but I’m warning you.
Hehe
oh and you’re talking about dry cleaning chemicals. dry cleaning isn’t actually clean, it’s just tumbled in chemicals that aren’t water
