Hydrophobic and cross-linked poly[cyclotriphosphazene-co-(4

4'-9-(fluorenylidene)diphenol)](PZHF)microspheres were facilely prepared by a one-step precipitation copolymerization of hexachlorocyclotriphosphazene and 4

4'-9-(fluorenylidene)diphenol with triethylamine as deacid reagent and acetonitrile as solvent.The chemical structure and morphology of the microspheres were characterized by Fourier transform infrared (FTIR)spectroscopy

X-ray photoelectron spectroscopy (XPS)and scanning electron microscopy (SEM)

respectively.Then the microspheres were employed to stabilize air-water interface to form liquid marbles.The static stability of the resultant liquid marble and the interfacial packing of the PZHF microspheres was investigated by digital camera and optical microscope

respectively.In addition

the vapor or gas permeability of the liquid marble was also studied.The results showed that the PZHF microspheres owned highly cross-linked and organic-inorganic hybrid structure

and the average particle size was 1.3 m.The microspheres possessed a rather rough surface and thus hydrophobicity.The microspheres could encapsulate liquid to form stable liquid marbles.The loose packing of the microspheres at the air-water interface endowed the liquid marble with unique vapor or gas permeability.The outside gas could diffuse into the liquid marble easily without destroying its architecture.