A kind of high-density polyethylene oil-water separation material and preparation method thereof

Abstract

The invention discloses a high-density polyethylene oil-water separation material and a preparation method thereof. The method comprises the following steps: with polyethylene oxide and high-density polyethylene as raw materials, performing melt extrusion with an extruder, and coiling and collecting with a coiling machine; leaching the collected sample with deionized water to remove the polyethylene oxide; and performing freeze drying treatment with a refrigerator and a freeze dryer to obtain the high-density polyethylene oil-water separation material. The method has the advantages of simple technology, short time, no chemicals or consequent environmental pollution and low cost. The high-density polyethylene oil-water separation material prepared by the method comprises a structure of high-density polyethylene continuous filament, and the structure has pores with diameter of several microns to over ten microns, shows a porous oriented fiber-like structure and realizes a relatively good adsorption effect on oil and organic reagent; and the sample has continuous length, is soft and can be woven into large-area oil-water separation fabric, thereby providing an effective solution for controlling the offshore oil leakage and purifying domestic sewage.

Description

technical field [0001] The invention belongs to the field of novel material processing and preparation, and relates to a preparation method of a three-dimensional porous oil-water separation material, in particular to a high-density polyethylene oil-water separation material and a preparation method thereof. Background technique [0002] In recent years, the treatment of crude oil spills at sea and the purification of oily domestic sewage are facing increasing challenges. The current treatment methods can be roughly divided into the following categories: using hydrophobic and lipophilic materials to recover oil on the water surface, using dispersants to mix oil and water, and Promote its natural degradation and direct combustion to remove slick oil. The general preferred method is to use materials with hydrophobic and lipophilic properties to recover the oil slick on the water surface, because it can properly handle the oil slick without causing secondary pollution. These h...

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Problems solved by technology

In 2004, Jiang Lei's research group introduced the concept of superhydrophobic into the application of oil-water separation for the first time, and successfully prepared a superhydrophobic and super-oleophilic metal grid; Sun Litao's research group used the method of chemical reaction to place the water dispersion of graphite oxide Graphene hydrogels were formed after thermal reduction at 180°C for 24 hours, and then the hydrogels were freeze-dried to obtain graphene aerogels. The prepared aerogels had porous structures and hydrophobic-lipophilic properties. This kind of three-dimensional porous hydrophobic material has poor mechanical strength, and the three-dimensional framework cannot be deformed or easily destroyed by crushing, so it has low applicability in the complex environment of actual water-oil separation; Wu Dehai's research group at Tsinghua University prepared it by chemical vapor deposition Three-dimensional porous sponge-like carbon nanotube quick-loading material, carbon nanotube sponge has super-hydrophobic properties, rich pore structure and ultra-light density make the material have strong oil absorption capacity, and the amount that can absorb organic solvents or oils is about 80 to 180 times its own weight, but the preparation method is complicated and the cost is high; and the electrospinning method commonly used in the prior art requires the addition of organic solvents when using this method to prepare oil-water separation materials, which endangers human health and pollutes the environment. The time is long, which reduces the production efficiency and is not conducive to large-scale industrial production and application

However, at present, the processing of high-density polyethylene into oil-water separation materials requires relatively complicated preparation methods and equipment, and the cost is high, which is not conducive to large-scale production and application.

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