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Preparation and application of oil-water separation net membrane with different wettability

A technology of oil-water separation omentum and wettability, applied in the direction of liquid separation, separation method, grease/oily substance/suspton removal device, etc., to achieve the effect of good cycle stability, high separation efficiency and easy availability of raw materials

Inactive Publication Date: 2018-01-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the objects of the present invention is to provide a kind of oil-water separation omentum with superhydrophobic superoleophilicity in air and superhydrophobic property under oil and another oil-water separation omentum with superhydrophilicity in air and superoleophobic property under water, Suitable for repeated use in various environments, thus overcoming the shortcomings of existing oil-water separation materials

Method used

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  • Preparation and application of oil-water separation net membrane with different wettability
  • Preparation and application of oil-water separation net membrane with different wettability
  • Preparation and application of oil-water separation net membrane with different wettability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1, One-step chemical vapor deposition method to prepare superhydrophobic superoleophilic and sub-oil superhydrophobic oil-water separation omentum

[0041] (1) Cut the 500-mesh stainless steel mesh into many small pieces (3cm×3cm), then ultrasonically clean them with acetone, absolute ethanol, and deionized water for 5 minutes, and dry them at room temperature;

[0042] (2) Lay the stainless steel mesh dried in step (1) on a cylindrical crucible (inner diameter 3cm, height 5cm) filled with 0.5g liquid polydimethylsiloxane, and then put them into the muffle In the furnace, calcined at high temperature. The calcination temperature of the muffle furnace is set at 350°C, the heating rate is 10°C / min, and the calcination time is 2h. After the muffle furnace is naturally cooled to room temperature, it is taken out to obtain a superhydrophobic, superoleophilic and sub-oil superhydrophobic oil-water separation omentum.

[0043] The pore size of the oil-water separatio...

Embodiment 2

[0046] Example 2, One-step chemical vapor deposition method to prepare superhydrophobic superoleophilic and sub-oil superhydrophobic oil-water separation omentum

[0047] (1) Cut the 120-mesh aluminum mesh into many small pieces (3cm×3cm), then ultrasonically clean them with acetone, absolute ethanol, and deionized water for 5 minutes, and dry them at room temperature;

[0048] (2) Lay the aluminum mesh dried in step (1) on a cylindrical crucible (inner diameter 3cm, height 5cm) filled with 2g of liquid polydimethylsiloxane, and then put them into the muffle furnace Medium, high temperature calcination. The calcination temperature of the muffle furnace is set at 300°C, the heating rate is 5°C / min, and the calcination time is 2h. After the muffle furnace is naturally cooled to room temperature, it is taken out to obtain a superhydrophobic, superoleophilic and sub-oil superhydrophobic oil-water separation omentum.

[0049] The pore size of the oil-water separation mesh obtained ...

Embodiment 3

[0052] Example 3, One-step chemical vapor deposition method to prepare superhydrophobic superoleophilic and sub-oil superhydrophobic oil-water separation omentum

[0053] (1) Cut the 300-mesh glass fiber mesh into many small pieces (3cm×3cm), then ultrasonically clean them with acetone, absolute ethanol, and deionized water for 5 minutes respectively, and dry them at room temperature;

[0054] (2) Lay the glass fiber mesh dried in step (1) on a cylindrical crucible (inner diameter 3 cm, height 5 cm) filled with 1.5 g of liquid polydimethylsiloxane, and then put them into the Furnace, high temperature calcination. The calcination temperature of the muffle furnace is set at 400°C, the heating rate is 8°C / min, and the calcination time is 2h. After the muffle furnace is naturally cooled to room temperature, it is taken out to obtain a superhydrophobic, superoleophilic and sub-oil superhydrophobic oil-water separation omentum.

[0055] The pore size of the oil-water separation me...

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Abstract

The invention discloses preparation and application of an oil-water separation net membrane with different wettability. The method comprises the following steps: (1) ultrasonically cleaning a fabric net and airing; and (2) paving the aired fabric net on a crucible containing liquid polydimethyl siloxane, then putting into a muffle furnace, carrying out high-temperature calcination, cooling to achieve room temperature, and taking out to obtain the oil-water separation net membrane. The oil-water separation net membrane disclosed by the invention has the performances of super-hydrophobic, super-oleophilicity in air and super-hydrophobic in oil. Another oil-water separation net membrane disclosed by the invention has the performances of super-hydrophilicity in air and super-oleophobicity in water. According to the invention, the preparation process is simple, raw materials are easily available, the cost is low, and the oil-water separation net membrane is environmentally friendly and canbe produced and applied in large scale. The two net membranes provided by the invention can be used for separating various types oil-water mixtures, have the advantages of high separation efficiency,quick speed, high bearing pressure, no need for external driving, good stability, multiple times of circulation and the like, and can be applied to the fields of industrial oil-water separation, environment protection and the like.

Description

technical field [0001] The invention relates to the fields of chemical engineering and functional materials, in particular to the preparation and application of oil-water separation membranes with different wettability. Background technique [0002] In recent years, due to frequent oil spill accidents and the increasing discharge of industrial oily wastewater, the expanding water pollution has seriously threatened human health and the ecological environment. In addition, the quality of the oil is also affected by the moisture and impurities in the oil. Therefore, how to find a simple and efficient method to deal with water in oil or oil in water and to separate oil from water is in urgent need. [0003] Chinese invention patents with publication numbers CN103601826A and CN104888498A respectively disclose oil-water separation membranes and oil-water separation copper foams with superhydrophobic and superoleophilic properties. These two materials both achieve the effect of o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022C02F1/40
Inventor 文妮苗新蕊邓文礼杨小军龙梦影
Owner SOUTH CHINA UNIV OF TECH
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