A self-purifying superhydrophobic-extremely lipophilic composite filter bead and its preparation method

Abstract

The invention discloses a self-purifying superhydrophobic-extremely lipophilic composite filter bead and a self-purifying superhydrophobic-extremely lipophilic composite filter bead and a preparation method thereof. The silicone resin composite layer is coated with ceramsite, organic Silicone resin particles are piled up to form a silicone resin composite layer, and nanometer titanium dioxide particles are attached to the surface of the silicone resin particles. After ball milling, the ceramsite is washed with NaOH solution and dried, then soaked in a mixed solution of methyl silicon prepolymer resin, ethanol and nano-titanium dioxide, soaked in ammonia water; soaked in silane coupling agent, and kept in a high-pressure reaction kettle at 60°C 6h, 80°C for 12h, after adding absolute ethanol, continue to keep warm at 260°C. The present invention can quickly absorb and transport polar macromolecules in the water body inward; since the outer layer of the filter bead has super-hydrophobic properties, water molecules cannot penetrate the outer layer into the core ceramsite to keep the ceramsite dry, avoiding After the ceramsite absorbs water, the adsorption performance of polar macromolecular pollutants is reduced, thereby improving the oil absorption and storage capacity of the composite filter beads.

Description

technical field [0001] The invention relates to a self-purifying superhydrophobic-extremely lipophilic composite filter bead and a preparation method of the self-purifying superhydrophobic-extremely lipophilic composite filter bead, belonging to the technical field of composite material forming. Background technique [0002] In recent years, with the rapid development of my country's social economy, the quality of water resources has continued to decline, and the water environment has continued to deteriorate. Industrial wastewater, agricultural wastewater, medical wastewater, and domestic wastewater are discharged into rivers, lakes, and oceans without treatment or incomplete treatment, and the wastewater has many types of pollution, complex components, and poor biochemical properties. These sewages contain a large amount of protein, sugar, grease, urea and various parasitic bacteria, viruses, etc. A large number of such polar macromolecular pollutants are suspended in the ...

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Problems solved by technology

[0003] Artificial cleaning particles are currently widely used filter materials in sewage treatment plants and secondary water purifiers. The materials are mainly quartz sand filter materials, anthracite filter materials, polyaluminum chloride, activated carbon, honeycomb inclined tube fillers, fiber ball filters materials, garnet sand, etc. These materials all have certain adsorption properties, but they all have the disadvantages that the surface is hydrophilic, the adsorption capacity of the material to polar macromolecules is weak after absorbing water, and the material is difficult to regenerate after the material is saturated. Disposal of waste filter materials by landfill and other methods will also cause secondary pollution

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