Preparation of Superhydrophobic Corn Stover Powder and Its Oil-Water Separation Properties
Fe3O4 sol was produced using the sol-gel method,the surface of crushed maize straw as a substrate was coated by Fe3O4 sol and modified by octadecyltrimethoxysilane as low surface energy substance,showing superhydrophobicity and superoleophilicity with contact angle of 155° for water and 0° for oil.The opposite wetting properties of corn straw flour for oil and water can be used for the adsorption of light oils on the surface of water and the filtration of heavy oils below the surface of water.The separation efficiency for all types of oil is over 94％.
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