Preparation method of bionic oil-water separation copper foam

Abstract

The invention discloses a preparation method of bionic oil-water separation copper foam. A bionic natural plant leaf surface is hydrophobic and self-cleaning; an oxidation deposition method is used for preparing a double-layered graded super-hydrophobic surface with a pH (Potential of Hydrogen) responding bionic micro-nano scale; the method comprise: washing copper foam with diluted hydrochloric acid, acetone and distilled water to realize pre-treatment; immersing the copper foam into a reaction solution and carrying out oxidation deposition, so as to change shape characteristics of the surface of the copper foam, and form a bionic micro-nano scale double-layered graded structure on the surface of the copper foam; after finishing the oxidation deposition, immersing a copper net with the bionic micro-nano scale double-layered graded structure into a modification solution, so that a low-surface-energy film is formed on the surface of the copper net; finally, enabling the surface of the copper net to have a pH responding super-hydrophobic property. The preparation method has the advantages of simplicity in operation, controllable experiment parameters and low cost, and can be used for manufacturing an oil-water separation material; the bionic oil-water separation copper foam has a certain responding property on the acid-base property of a solution, can be used for carrying out acid-alkali controllable oil-water separation, and has good mechanical stability and repeated utilization property.

Description

technical field [0001] The invention relates to the field of bionic science, in particular to a preparation method of bionic oil-water separation copper foam. Background technique [0002] In the past few years, oil spill accidents have occurred continuously all over the world. At the same time, a large amount of industrial oily wastewater has been directly discharged into the environment, polluting the atmosphere and soil, and seriously endangering human health. Oil-water separation has become a severe challenge, which has attracted widespread attention at home and abroad. At present, oily sewage treatment methods are mainly divided into: membrane separation method, oil skimmer method, centrifugal separation method, biological oxidation method, gravity separation method, magnetic separation method, flotation method, adsorption method and chemical method. The method has problems such as expensive equipment, complicated processing steps, long processing time, and regeneratio...

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Problems solved by technology

At present, oily sewage treatment methods are mainly divided into: membrane separation method, oil skimmer method, centrifugal separation method, biological oxidation method, gravity separation method, magnetic separation method, flotation method, adsorption method and chemical method. The method has problems such as expensive equipment, complicated processing steps, long processing time, and regeneration pollution to the environment; although the membrane separation method is simple, efficient and widely used in the oil-water separation process, it is easily polluted, difficult to clean, and difficult to operate in practical applications. High cost; for this reason, researchers are committed to developing new membrane materials, such as superhydrophobic membranes, superoleophobic membranes, superhydrophobic superoleophilic membranes, etc. to overcome the above problems

[0003] The use of selectively permeable materials with special wettability in the process of oil-water separation can make oil selectively permeate the mesh and repel water, which can easily solve the problem of oil-water separation. In nature, many plants and insects show excellent Superhydrophobicity, such as lotus leaves, rose petals, marigold petals, rice leaves, water striders, butterfly wings and mosquito eyes, etc., inspired by the hydrophobic characteristics of the above-mentioned animals and plants, superhydrophobic samples can be prepared on the surface of ordinary metal materials, and Applying it to practical engineering, existing copper foams with superhydrophobic and superlipophilic properties, such as chemical etching, electrochemical deposition, electrospinning, sol-gel method, CVD method, etc., prepared by the above method The copper foam surface does not have a micro-nano scale bilayer hierarchical structure similar to natural plant leaves

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