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Super-hydrophobic super-oleophilic porous screen membrane for oil-water separation and preparation method and application thereof

An oil-water separation and super-hydrophobic technology, applied in separation methods, liquid separation, semi-permeable membrane separation, etc., can solve the problems of complex preparation process, inability to use for a long time, harsh preparation conditions, etc., and achieve cheap and easy-to-obtain raw materials, excellent attachment Effort and simple preparation method

Inactive Publication Date: 2017-08-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are some methods of preparing rough structures by electrochemical, chemical or acid etching, and then modifying the superhydrophobic and superoleophilic surface materials prepared by low surface energy substances, although these techniques can successfully prepare It is used for oil-water separation materials, but the preparation process is complex and the preparation conditions are harsh. Some technologies can only be applied to special substrates, and some require the use of strong acidic and strong alkaline reagents, which pollute the environment. There are also the disadvantages of poor stability and inability to be used for a long time, so it is still of great significance to quickly produce a stable superhydrophobic and superoleophilic omentum that can be used for oil-water separation using common and cheap raw materials and simple preparation methods

Method used

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  • Super-hydrophobic super-oleophilic porous screen membrane for oil-water separation and preparation method and application thereof
  • Super-hydrophobic super-oleophilic porous screen membrane for oil-water separation and preparation method and application thereof
  • Super-hydrophobic super-oleophilic porous screen membrane for oil-water separation and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Clean the 400-mesh stainless steel filter with acetone, ethanol, and deionized water in sequence, and dry it at room temperature for later use;

[0035] 2) Add 6107 thermoplastic resin into ethyl acetate, and ultrasonically dissolve it for 10 minutes to prepare 8wt% thermoplastic resin ethyl acetate solution; (the thermoplastic resin used in this example is not limited to 6107, and Dongguan Jincai New Material Co. , 870, 830, 860, VMCH, 6014, 6108, 6107, 6112, 608 one or more alternatives);

[0036] 3) Disperse HB-620 hydrophobic nano-silica particles in ethyl acetate reagent, sonicate for 20min, then transfer to a magnetic stirrer, stir for 30min at a speed of 1500rpm / min, the mass fraction of hydrophobic nano-silica in the solution It is 1wt% (the used hydrophobic nano silicon dioxide particle of present embodiment is not only limited to HB-620, can also use HB-139, HB-132, HB-630, HB-151, HB- 615, one or more alternatives to TS610).

[0037] 4) Soak the dried st...

Embodiment 2

[0043] 1) The 2000-mesh stainless steel filter screen was ultrasonically cleaned with acetone, ethanol, and deionized water in turn, and dried at room temperature for subsequent use;

[0044] 2) 6112 thermoplastic resin was added to acetone, and ultrasonically dissolved for 20min to prepare a 2wt% thermoplastic resin ethyl acetate solution; (the thermoplastic resin used in this example is not limited to 6112, and Dongguan Jincai New Materials Co., Ltd., 870 , 830, 860, VMCH, 6014, 6108, 6107, 608 one or more alternatives, the effect is similar to this embodiment);

[0045] 3) Disperse HB-630 hydrophobic nano-silica particles in ethanol reagent, sonicate for 20 minutes, then transfer to a magnetic stirrer, stir at a speed of 1000 rpm / min for 40 minutes, the mass fraction of hydrophobic nano-silica in the solution is 0.5 wt%. (The hydrophobic nano-silica particles used in this example are not limited to HB-630, but also HB-139, HB-132, HB-620, HB-151, HB-615, TS610 of Guangzhou...

Embodiment 3

[0050] 1) The 200-mesh copper mesh was ultrasonically cleaned with acetone, ethanol, and deionized water successively, and dried at room temperature for subsequent use;

[0051] 2) 870 thermoplastic resin was added to cyclohexanone, and ultrasonically dissolved for 30min to prepare a 4wt% thermoplastic resin ethyl acetate solution; (the thermoplastic resin used in this example is not limited to 870, and Dongguan Jincai New Materials Co., Ltd. can also be used. , 6112, 830, 860, VMCH, 6014, 6108, 6107, 608 one or more alternatives);

[0052] 3) Disperse HB-151 hydrophobic nano-silica particles in isooctane reagent, sonicate for 20min, then transfer to a magnetic stirrer, stir at a speed of 2000rpm / min for 60min, the mass fraction of hydrophobic nano-silica in the solution 1.0 wt%. (The hydrophobic nano-silica particles used in this example are not limited to HB-151, but also HB-139, HB-132, HB-620, HB-630, HB-615, TS610 of Guangzhou Jibisheng Technology Industrial Co., Ltd. o...

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Abstract

The invention discloses a super-hydrophobic super-oleophilic porous screen membrane for oil-water separation and preparation method and application thereof. The preparation method includes: soaking a porous screen membrane in thermoplastic resin solution, pulling the porous screen membrane from the solution, drying at the room temperature, spraying hydrophobic nano silicon dioxide solution to the surface of the fixed porous screen membrane, drying, transferring the porous screen membrane in a drying oven at 60-160 DEG C for heat treatment, taking out, cooling to the room temperature, and adding in ethanol solution; repeating the process for two times to obtain the super-hydrophobic super-oleophilic porous screen membrane. The super-hydrophobic super-oleophilic porous screen membrane is free of strong-acidity, strong-alkalinity and strong-oxidizability agents and expensive fluorine-containing substances and suitable for various substrates and large-scale production; the porous screen membrane is nontoxic, harmless, recyclable and capable of realizing quick and efficient separation of various oil-water mixtures; the screen membrane is high in stability, high in scratch resistance and high in separation efficiency of strong-acidity, strong-alkalinity and high-salt oily wastewater.

Description

technical field [0001] The invention relates to the application of oil-water separation, in particular to a superhydrophobic superoleophilic porous mesh for oil-water separation and a preparation method thereof, belonging to the technical field of chemical engineering and functional materials. Background technique [0002] In recent years, it has become an important breakthrough to promote the development of oil-water separation technology by using the special wettability of materials on the different interfaces of oil and water to realize oil-water separation. Oleophilic surface materials have been extensively researched and developed. Jiang Lei first proposed to spray polytetrafluoroethylene latex on the surface of stainless steel. After drying, a super-hydrophobic and oleophilic filter membrane was prepared, and achieved efficient oil-water separation. Chinese invention patent CN105418837A discloses a phase-separated porous super-hydrophobic coating material that introduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/02B01D17/022B01D67/00B01D69/12
CPCB01D17/02B01D17/0202B01D17/085B01D67/0002B01D69/12B01D2323/39B01D2325/38
Inventor 寇文冠文秀芳
Owner SOUTH CHINA UNIV OF TECH