Scratch-resistant super-hydrophobic and oleophylic cellulose oil and water adsorption/separation film and preparation method thereof

Abstract

The invention discloses a scratch-resistant super-hydrophobic and oleophylic cellulose oil and water adsorption / separation film and a preparation method thereof. The scratch-resistant super-hydrophobic and oleophylic cellulose oil and water adsorption / separation film consists of a cellulose film and a metal oxide, wherein the metal oxide is grown at the surface of the film in an in-situ way after the surface is treated by a stearic acid ethanol solution; the contact angle with water in air is greater than 150 degrees, the rolling angle is smaller than 10 degrees, and the contact angle with oil in water air is 0 degree; after scratching by a knife blade for ten times, the contact angle with water is still greater than 150 degrees, and the rolling angle is still smaller than 10 degrees. The scratch-resistant super-hydrophobic and oleophylic cellulose oil and water adsorption / separation film has the advantages that the high scratch-resistant, super-hydrophobic and oleophylic properties are realized; the preparation technology is simple, the energy consumption is low, the consumption time is short, the complicated equipment or inert atmosphere is not needed, the amount of used material and reagent is small, and the toxic or side effect is little; the pollution matters of organic fluorine, organic phosphor, organic silicon and the like are not produced in the reaction treatment process, the pollution to environment is little, and the large-scale production and preparation is realized.

Description

technical field [0001] The invention belongs to the technical field of hydrophobic and lipophilic membrane materials and their preparation, and in particular relates to a scratch-resistant superhydrophobic and lipophilic cellulose oil-water adsorption / separation membrane and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, the demand for chemical products is also increasing. Although this has promoted the rapid development of the chemical industry, at the same time, the environmental pollution caused by the leakage of chemical raw materials has become increasingly prominent, especially halogenated hydrocarbons, etc. A variety of organic solvents (heavy oils), which are denser than water, enter the rivers and are located in the lower layer of the water body, which is difficult to remove through natural volatilization, causing serious water pollution. At present, the treatment of heavy oil-containing wastewater main...

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Problems solved by technology

Although it can be used for underwater oil absorption and oil-water separation, it needs to use large-scale freeze-drying equipment in the process of preparing cellulose airgel, the process is complicated, and it needs to be washed with a large amount of methanol during hydrophobic modification, so that there is a lot of waste in this step. Modifier waste and methanol emissions, in addition, this type of material still lacks mechanical scratch stability (Zhou, S.; Liu, P.; Wang, M.; Zhao, H.; Yang, J.; Xu, F. Sustainable, Reusable, and Superhydrophobic Aerogels from Microfibrillated Cellulose for Highly Effective Oil / Water Separation. ACSSustainable Chem. Eng. 2016, 4, 6409-6416.)

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