Abstract:  A new sort of functional paper with excellent adsorptive performance was prepared with ceramicfiber paper as matrix‚by sequentially dipping in the solutions of water glass （Na₂SiO₃）‚precipitant and hydrochloric acid．This kind of functional paper can be applied to prepare the core of adsorption type rotary dehumidifier．The effects of dipping conditions on the adsorptive performance were discussed．The surface morphology and the pore size were disclosed with SEM and Porous Medium Surface Area Analyzer‚thus discovering the adsorptive characteristics．Experimental results show that silica gel is deposited on the surface and in the apertures of the matrix uniformly‚with the average pore size of 0.4939～3.907 nm．The prepared functional paper has quite high adsorption rate in the first 20minutes and will get its adsorption saturation within5hours．The saturated adsorptive capacity can reach 52.19g／m² in the conditions of 26．67％ （mass fraction） Na₂SiO₃ ‚15％ （mass fraction） precipitant and0.5mol ／L HCl．

Key words: ceramic fiber, functional paper, dipping, preparation, adsorption performance