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Super-hydrophilic and super-oleophobic oil-water separation ceramic membrane as well as preparation method and application thereof

An oil-water separation, ceramic membrane technology, applied in separation methods, immiscible liquid separation, liquid separation and other directions, can solve the problem of not very high circulation, achieve the effect of simple preparation process, short cycle and solving complex preparation

Pending Publication Date: 2020-12-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, compared with traditional methods, this method based on special wettability has stable properties, good separation efficiency, and rapid preparation, but the cycle rate is not very high

Method used

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  • Super-hydrophilic and super-oleophobic oil-water separation ceramic membrane as well as preparation method and application thereof
  • Super-hydrophilic and super-oleophobic oil-water separation ceramic membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Add 10wt% pore-forming agent PVA to the alumina powder, hold it under a pressure of 8MPa for 3 minutes, dry press molding, the thickness is 2mm, and then cold isostatic pressing under a pressure of 200MPa for 200s to obtain a molded ceramic blank body;

[0031] 2. Sinter the shaped ceramic body at 1550°C for 1 hour, then immerse it in a liquid mixture consisting of TEOS / PDMS with a mass ratio of 1:1, and then transfer it to a reaction chamber filled with 15wt% HCl vapor, And equilibrate at a temperature of 60° C. for 60 minutes; dry in an oven at 40 to 60° C. for 2 to 4 hours to remove the generated water and obtain a ceramic membrane for oil-water separation.

[0032] The oil-water separation efficiency of the obtained oil-water separation ceramic membrane is as high as 98%, and the separation efficiency is still as high as 97% after being recycled for 10 times.

[0033] figure 1 Among them, (a) is the oil-water separation device used in the present invention; (b)...

Embodiment 2

[0036] 1. Add 10wt% PVA to the zirconia powder, keep it under 8MPa pressure for 3 minutes to dry press molding, the thickness is 2mm, and then cold isostatic pressing under 200MPa pressure for 200s to make a molded ceramic body;

[0037] 2. Sinter the formed ceramic green body at 1550 °C for 1 h, then immerse it in a mixed liquid of TEOS and PDMS with a mass ratio of 1:1, and then transfer it to a reaction chamber filled with 15 wt% HCl vapor, and heat it at 60 Equilibrate at ℃ for 60 minutes, and dry in an oven at 40℃ for 4 hours to prepare a ceramic membrane for oil-water separation.

[0038] The oil-water separation efficiency of the obtained oil-water separation ceramic membrane is as high as 95%, and the separation efficiency is still as high as 93%.

Embodiment 3

[0040] 1. Add 20wt% PVA to the alumina powder, keep dry pressing for 3 minutes under the pressure of 8MPa, the thickness is 2mm, and then cold isostatic pressing under the pressure of 200MPa for 200s to obtain the molded ceramic body;

[0041] 2. Sinter the formed ceramic body at 1550 ° C for 1 h, then immerse it in a mixed liquid composed of TEOS and PDMS with a mass ratio of 1:1, and then transfer the block to a reaction chamber filled with 15 wt% HCl vapor, and Equilibrate at 60°C for 60min, and dry in an oven at 60°C for 2h to remove the generated water to prepare a ceramic membrane for oil-water separation.

[0042] The oil-water separation efficiency of the obtained oil-water separation ceramic membrane is as high as 97%, and after 10 cycles, the separation efficiency is still as high as 95%.

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Abstract

The invention belongs to the technical field of oil-water separation, and discloses a super-hydrophilic and super-oleophobic oil-water separation ceramic membrane as well as a preparation method and application thereof. The oil-water separation ceramic membrane is prepared by the following steps of: mixing ceramic powder and a pore forming agent, carrying out dry pressing molding under 1-20MPa, and carrying out isostatic cool pressing under 200-250MPa to obtain a ceramic blank; and sintering the ceramic blank at 1000-2000 DEG C, then immersing the ceramic blank into a mixed liquid of TEOS andPDMS, transferring the ceramic blank into a reaction chamber filled with acid steam, balancing at 30-60 DEG C, and drying at 40-60 DEG C to obtain the product. The oil-water separation ceramic membrane disclosed by the invention has super-hydrophilicity and super-oleophobicity, can still keep relatively high hydrophobicity after being repeatedly used for tens of times during super-hydrophobic treatment, can be repeatedly subjected to super-hydrophobic treatment even if the hydrophobicity becomes poor, and can be recycled, so that the problem of poor circularity of a commercial oil-water separation membrane is solved.

Description

technical field [0001] The invention belongs to the technical field of oil-water separation, and more specifically relates to a superhydrophilic and superoleophobic oil-water separation ceramic membrane, a preparation method and application thereof. Background technique [0002] On April 20, 2010, a crude oil spill occurred in the Gulf of Mexico in the United States, which aroused great concern from the international community. Many countries sent equipment and personnel to the United States to help the United States deal with the pollution problem as soon as possible. Since then, people have paid more and more attention to oil-water separation. [0003] Generally speaking, the current separation methods mainly include physical methods, biological methods, chemical methods, and electrochemical methods, among which physical separation methods include gravity separation, centrifugal separation, and filtration separation. These traditional oil-water separation technologies gen...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00C02F1/40C02F1/44B01D17/022
CPCB01D71/024B01D71/025B01D71/02B01D67/0039B01D67/0041C02F1/40C02F1/44B01D17/02B01D17/085B01D2325/38B01D2323/04
Inventor 刘伟梁坚伟杨高曾宝宝付冲
Owner GUANGDONG UNIV OF TECH
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