Oil-water separating mesh film and preparation method thereof

Abstract

The invention discloses an oil-water separating mesh film and a preparation method thereof. The preparation method comprises the following steps of: 1) dissolving polylactic acid in an organic solvent to obtain a polylactic acid solution; 2) adding a porogen into the polylactic acid solution and evenly mixing to obtain a mixed solution; and 3) carrying out phase separation on the mixed solution, so as to obtain the oil-water separating mesh film. The experiment of the invention proves that the oil-water separating mesh film disclosed by the invention has the characteristics of stability and high separation efficiency; the oil-water separating mesh film can be prepared in large area, the separated oil can be recycled, the separating mesh film can be repeatedly used, and the separation effect can not be influenced. After being used and abandoned, the oil-water separating mesh film can be degraded in the natural environment, so that the secondary pollution can be avoided. The biodegradable oil-water separating mesh film with super-hydrophobic and super-oleophylic properties can be used for oil-water separation of oily sewage containing edible oil, gasoline and the like.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering and functional materials, and in particular relates to an oil-water separation membrane and a preparation method thereof. Background technique [0002] With the massive discharge of oily sewage in production and life and the frequent occurrence of oil spill accidents at sea, the exploration and research of oil-water separation has become an important topic related to people's life, economic development and environmental safety, and oil-water separation technology is very important for solving water pollution and Issues such as the purification of fuel oil play a vital role. Traditional oil-water separation methods such as gravity separation, centrifugal separation, electrical separation, adsorption separation, and air flotation separation have many disadvantages. Some separation efficiency is not high, and some chemicals are added too much to cause secondary pollution. Some energy c...

AI Technical Summary

Problems solved by technology

Although these separation membranes have achieved the effect of oil-water separation, they all have certain shortcomings.

Some preparation processes are complicated, some use fluorine-containing organic substances, and some need to add a variety of chemical reagents. At the same time, the preparation of these oil-water separation membranes needs to be supported by other fabrics such as steel mesh, copper mesh, and nylon mesh. The production cost is increased. At the same time, the materials used for the oil-water separation membrane itself are mostly chemically synthesized polymer materials, which are not easy to degrade. The lipophilicity of the material itself makes the membrane very easy to be polluted by oil. The use of incineration and landfill treatment methods will cause secondary pollution to the environment and other issues.

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