摘要: Abstract A covalent network of polymer can imbibe a solvent to form gel. In cavity on the surface gel, capillary force may suck out gel pure liquid phase. We show that such osmocapillary phase separation occurs when capillarity balances osmosis, and diffusion in prevails over condensation from vapor. Osmocapillary occur even is isolated vapor, or nonvolatile. relate phenomena practical significance, including wettability gels, transparency bridge at tip an atomic microscope, adhesion between another substance, morphology production tight oil.