A liquid marble was prepared with glycerol-water mixture as the core material and super-hydrophobic micro-SiO2 as the wall material.The surface morphology and the quality of liquid marble was obtained by biological microscope,contact angle measuring instrument and electronic balance.A certain concentration of salt provided sufficient humidity.The property and mechanism of the marble were studied from the liquid marble absorbability,control performance and wall material.The results shown that the marble had strong hygroscopicity,and it can absorb water from the environment when the ambient humidity was higher.When the ambient humidity was lower,it can release water to the environment.It had good humidity control performance.The marble coated with nano-SiO2 had a higher moisture absorption rate than the micron SiO2 coated liquid marbles.The moisture absorption rate and water loss rate of the liquid droplets were higher than that of the marble.The surface of the marble was coated with multi-layer superhydrophobic micro-SiO2 by subtractive method.
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