The adsorption of water vapor on carbon black grades N115, N220, N326 and N550 was investigated at a relative humidity of 10 to 90% by a desiccator method. The necessary moisture in the desiccator was created with a solution of sulfuric acid of a certain concentration. The physicochemical properties of carbon black are investigated: specific surface area, pore volume, average pore size, elemental composition, structure and content of oxygen-containing functional groups on the surface. The influence of the physicochemical properties of carbon black of various grades on their moisture absorption is established.
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