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Super-hydrophobic super-oleophilic filter membrane, and preparation method and applications thereof

A super-oleophilic and super-hydrophobic technology, applied in separation methods, chemical instruments and methods, membranes, etc., can solve the problems of unsuitable oil-water emulsion separation, high cost of recovery of distilled oil, and long separation time, so as to facilitate large-scale production , The method is simple, and the effect of speeding up the preparation process

Active Publication Date: 2017-07-04
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This release and cleaning process usually requires energy consumption and is prone to secondary pollution
[0004] To sum up, traditional separation methods have low separation efficiency, are prone to secondary pollution, and are not suitable for the separation of oil-water emulsions.
However, the superhydrophobic-superoleophilic polymer sponge has the problems of long separation time, extrusion and recovery of distilled oil.

Method used

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  • Super-hydrophobic super-oleophilic filter membrane, and preparation method and applications thereof
  • Super-hydrophobic super-oleophilic filter membrane, and preparation method and applications thereof
  • Super-hydrophobic super-oleophilic filter membrane, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The preparation of embodiment 1 superhydrophobic superoleophilic filtration membrane

[0043] figure 1 It is a schematic diagram of the preparation process of the superhydrophobic and superoleophilic filtration membrane of the present invention, and its specific operation steps are as follows:

[0044] Use a copper mesh as a porous mesh substrate, place it over a flame to bake the carbon black, and stop baking when the surface of the copper mesh is completely black. see figure 2 , figure 2 a is a schematic diagram of baking carbon black, figure 2 b is the photo of the copper mesh of unbaked carbon black, figure 2 c is a photo of the copper mesh after baking carbon black; it can be seen from the figure that after baking carbon black, the copper mesh turns black, but the carbon black can be separated from the copper mesh by lightly touching it with your fingers ( figure 2 c).

[0045] Then the copper grid with the deposited carbon black film was placed in a che...

Embodiment 2

[0048] Embodiment 2 tubular oil-water separation method

[0049] The super-hydrophobic and super-oleophilic filtration membrane prepared in embodiment 1 is rolled into a tubular shape (such as Figure 6 As shown), a separation tube with a length of 10 cm was prepared, and the two ends of the separation tube were respectively connected with two rubber tubes, placed horizontally on the test tube rack, and then the oil-water mixture was directly transported through the separation tube from one end, and the Fast and efficient oil-water separation. The oil seeps out quickly from the separation tube and flows into the collector below, while the water flows out from the rubber tube at the other end, which completely solves the problem of water resistance caused by specific gravity when the traditional flat membrane is separated from top to bottom. Tests have proved that the separation efficiency of the super-hydrophobic and super-oleophilic filtration membrane prepared by the presen...

Embodiment 3

[0051] Embodiment 3 Tube type oil-water separator

[0052] According to the method provided by the invention, a tubular oil-water separator can be prepared to realize industrial oil-water separation. Such as Figure 8 As shown, the oil-water separator includes an S-shaped spiral oil-water separation pipeline 1, a water pump 2, a sewage inlet 3, a drain pipe 4 and an oil sump 5. The material of the oil-water separation pipeline 1 is a super-hydrophobic super-oleophilic filter membrane. One end of the oil-water separation pipeline 1 is connected with a pump 2, which is used to extract oily sewage from the outside, and then the oily sewage enters the oil-water separation pipeline 1 through the sewage inlet 3. Due to the effect of its super-hydrophobic and super-oleophilic filter membrane, the oil droplets 6 seep out from the pipeline and flow into the oil collection tank 5 below, and the separated water flows out from the drain pipe 4 to achieve the effect of oil-water separatio...

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Abstract

The invention relates to a super-hydrophobic super-oleophilic filter membrane. The super-hydrophobic super-oleophilic filter membrane comprises a porous netted substrate; the surface of the porous netted substrate is covered by an amorphous carbon film via deposition; the outer side of the amorphous carbon film is modified with silicon dioxide; the surface of silicon dioxide is modified with a hydrophobic layer. The invention also discloses a preparation method. According to the preparation method, the surface of the porous netted substrate is subjected to roasting so as to realize deposition of the amorphous carbon film on the surface of the porous netted substrate; vapour deposition is adopted so as to realize hydrolysis reaction of a precursor under the action of a catalyst, obtain silicon dioxide, and realize deposition of silicon dioxide onto the surface of the porous netted substrate; and the surface of the porous netted substrate is modified with a hydrophobic treating agent. The invention also discloses a filtering method using the super-hydrophobic super-oleophilic filter membrane. According to the filtering method, a fluid delivery pipe is provided, and the side wall of the fluid delivery pipe is prepared from the super-hydrophobic super-oleophilic filter membrane; an oil-water mixture to be separated is delivered into the fluid delivery pipe from an inlet end, and flows along the fluid delivery pipe; and oil and water are collected via a lower part and an outlet end of the fluid delivery pipe respectively.

Description

technical field [0001] The invention relates to the field of separation of oil-water materials, in particular to a super-hydrophobic and super-oleophilic filter membrane and its preparation method and use. Background technique [0002] With the increase of industrial oily wastewater discharge, marine water pollution and frequent oil spill incidents, oil-water separation has become a worldwide problem. Although traditional separation methods such as gravity separation, centrifugal separation, electric flotation and absorbent methods can separate immiscible oil-water mixtures, they have the disadvantages of low efficiency, poor selectivity and are not suitable for oil-water emulsion separation. Polymer-based filtration membranes are capable of separating emulsions, but have the disadvantages of easy degradation, low flux, and easy clogging. The filter type oil-water separation screen or membrane usually adopts the upper and lower flat membrane separation method to filter and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/02B01D67/00B01D17/022
CPCB01D17/02B01D67/0044B01D69/02B01D71/027B01D2325/38
Inventor 石震武张锋吴竹慧徐成云彭长四
Owner SUZHOU UNIV
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