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Super-hydrophobic-oleophylic porous material, and preparation method and application thereof

A porous material and super-hydrophobic technology, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of oil-water separation efficiency to be improved, poor stability and corrosion resistance, complex preparation process, etc., to achieve good industrial The effect of application prospect, high oil absorption ratio and simple process

Inactive Publication Date: 2019-09-27
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing flexible three-dimensional porous adsorption materials often have defects such as complex preparation process, high cost, difficulty in batch preparation, poor stability and corrosion resistance, and oil-water separation efficiency still needs to be improved.

Method used

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  • Super-hydrophobic-oleophylic porous material, and preparation method and application thereof
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  • Super-hydrophobic-oleophylic porous material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1 A kind of preparation method of superhydrophobic-oleophilic porous material can be carried out in the following steps:

[0042] (1) Copper mesh with a pore size of 50 microns (refer to the morphology Figure 1A ) after being ultrasonically cleaned with acetone and water in sequence, and then dried at 80°C to remove surface organic substances;

[0043] (2) Dissolve 0.1 g of perfluorooctyltrimethoxysilane in 50 mL of ethanol, then add it into 50 mL of phytic acid aqueous solution (2 mg / mL), and mix to form an impregnation solution.

[0044] (3) Immerse the copper grid in the above impregnation solution, soak it at 30°C for 8 hours, then take it out, and dry it at 80°C to obtain a superhydrophobic-oleophilic porous material (see Figure 1B-Figure 1D ).

[0045] The water contact angle of the superhydrophobic-oleophilic porous material is 155°, the contact angle of toluene is 0°, and the rolling angle is 4°. The oil-water separation experiment was carried out...

Embodiment 2

[0048] Example 2 A kind of superhydrophobic-lipophilic porous material is basically the same as the preparation method of the superhydrophobic-lipophilic porous material in Example 1, the difference is: the metal mesh base has a different aperture, and the aperture is 80 microns; the copper mesh is used in the dipping solution Soak at 10°C for 10 hours; the mass ratio of phytic acid to fluorine-containing silane is 1:0.5, and the amount of phytic acid accounts for 0.5‰ of the mass of the soaking solution.

[0049] Tests show that the water contact angle of the superhydrophobic-oleophilic porous material is 156°, the contact angle of toluene is 0°, and the rolling angle is 4°; the oil-water separation experiment performed with reference to the method of Example 1 shows that the oil-water separation efficiency is 96% ; The oil absorption rate is 8mL / min.

Embodiment 3

[0050]Example 3 A kind of superhydrophobic-lipophilic porous material is basically the same as the preparation method of the superhydrophobic-lipophilic porous material in Example 1, the difference is: the aperture of the metal mesh base is different, and the aperture is 100 microns; the copper mesh is in the dipping solution Soak for 4 hours at 40°C; the mass ratio of phytic acid to fluorine-containing silane is 1:2, and the amount of phytic acid accounts for 2‰ of the mass of the soaking solution.

[0051] Tests show that the water contact angle of the superhydrophobic-oleophilic porous material is 158°, the contact angle of toluene is 0°, and the rolling angle is 4°; the oil-water separation experiment performed with reference to the method of Example 1 shows that the oil-water separation efficiency is 95% ; The oil absorption rate is 11mL / min.

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Abstract

The invention provides a super-hydrophobic-oleophylic porous material, and a preparation method and application thereof. The super-hydrophobic-oleophilic porous material comprises a metal grid structure and an organic-inorganic hybrid coating covering the metal grid structure, wherein the organic-inorganic hybrid coating is mainly formed by the reaction of phytic acid and fluorine-containing silane. According to the super-hydrophobic-oleophylic porous material, and the preparation method and application thereof, through the cocondensation of the phytic acid and the fluorine-containing silane, and the chelation of the phytic acid and the metal grid structure, an organic-inorganic hybrid micro-nano structure is formed on the surface of the metal grid structure, and the super hydrophobic-oleophilic modification of the surface of the metal grid structure is realized. The super-hydrophobic-oleophilic porous material provided by the invention can float on a water surface, can recover different kinds of floating oil on water efficiently, and has stable super hydrophobicity and corrosion resistance in a high salt spray environment; the oil absorption rate and oil-water separation efficiency are high; meanwhile, the preparation method is simple, the cost is low, large-scale preparation can be realized, and a very good industrial application prospect is realized.

Description

technical field [0001] The invention relates to a hydrophobic and lipophilic material, in particular to a superhydrophobic-oleophilic porous material, its preparation method and its application in marine oil spill recovery and oil-water separation, and belongs to the field of functional materials. Background technique [0002] With the development of social industry, oil spills, which come from oil exploration, transportation, storage, etc., not only cause huge losses of energy, but also have adverse effects on the ecosystem. Traditional oil spill recovery technologies and materials such as oil collectors, oil dispersants, lipophilic, oil-absorbing materials, etc., cannot meet the marine environment due to their low adsorption capacity, low efficiency, non-recoverable oil, poor reusability, and serious secondary pollution. The need for protection and resource utilization. In particular, the oil recovered by the traditional method contains a large amount of water, which is d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/40B01D17/022
CPCB01D17/0202B01J20/24B01J20/28014B01J20/28054C02F1/40
Inventor 曾志翔顾林付超
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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