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Super-hydrophobic demulsifying oil-water separation membrane material, preparation method and application thereof

A super-hydrophobic, emulsifiable oil technology, applied in separation methods, liquid separation, semi-permeable membrane separation, etc., can solve problems such as harsh conditions, complex processes, and high energy consumption, and achieve good separation ability and good separation effect

Pending Publication Date: 2020-06-26
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a superhydrophobic demulsification oil-water separation membrane material and its preparation method and application. The preparation method of the superhydrophobic demulsification oil-water separation membrane material is time-saving, simple and low in cost, which not only overcomes the oil-water separation device in the prior art Complex process, high energy consumption, high cost, harsh conditions and other problems, but also has good hydrophobicity, demulsification ability and strong oil-water separation ability

Method used

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  • Super-hydrophobic demulsifying oil-water separation membrane material, preparation method and application thereof
  • Super-hydrophobic demulsifying oil-water separation membrane material, preparation method and application thereof
  • Super-hydrophobic demulsifying oil-water separation membrane material, preparation method and application thereof

Examples

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Embodiment 1

[0043]A kind of preparation method of superhydrophobic demulsification oil-water separation membrane material (PDMS glass fiber filter membrane), concrete steps are as follows:

[0044] (1) Add 1 g of polydimethylsiloxane (PDMS) solution into 100 g of organic solvent n-hexane solution, and stir magnetically for 30 minutes to mix PDMS and organic solvent evenly to obtain polydimethylsiloxane with a mass concentration of 1%. PDMS-n-hexane mixed solution;

[0045] (2) Take out the glass fiber filter membrane, first use ethanol and deionized water to carry out ultrasonic cleaning to the glass fiber filter membrane, and then after washing with distilled water, dry in an oven until completely dry;

[0046] (3) Soak the dried glass fiber filter membrane in the PDMS-n-hexane mixed solution, soak the glass fiber filter membrane 5 times repeatedly to ensure that the glass fiber filter membrane is completely soaked by the PDMS-n-hexane mixed solution;

[0047] (4) Take out the glass fib...

Embodiment 2

[0079] A kind of preparation method of superhydrophobic demulsification oil-water separation membrane material (PDMS glass fiber filter membrane), concrete steps are as follows:

[0080] (1) Add 5 g of polydimethylsiloxane (PDMS) solution into 100 g of organic solvent n-hexane solution, and stir magnetically for 30 minutes to mix PDMS and organic solvent evenly to obtain polydimethylsiloxane with a mass concentration of 5%. PDMS-n-hexane mixed solution;

[0081] (2) Take out the glass fiber filter membrane, first use ethanol and deionized water to carry out ultrasonic cleaning to the glass fiber filter membrane, and then after washing with distilled water, dry in an oven until completely dry;

[0082] (3) Soak the dried glass fiber filter membrane in the PDMS-n-hexane mixed solution, soak the glass fiber filter membrane 5 times repeatedly to ensure that the glass fiber filter membrane is completely soaked by the PDMS-n-hexane mixed solution;

[0083] (4) Take out the glass fi...

Embodiment 3

[0086] A kind of preparation method of superhydrophobic demulsification oil-water separation membrane material (PDMS glass fiber filter membrane), concrete steps are as follows:

[0087] (1) Add 10 g of polydimethylsiloxane (PDMS) solution into 100 g of organic solvent n-hexane solution, and stir magnetically for 30 minutes to mix PDMS and organic solvent evenly to obtain polydimethylsiloxane with a mass concentration of 10%. PDMS-n-hexane mixed solution;

[0088] (2) Take out the glass fiber filter membrane, first use ethanol and deionized water to carry out ultrasonic cleaning to the glass fiber filter membrane, and then after washing with distilled water, dry in an oven until completely dry;

[0089] (3) Soak the dried glass fiber filter membrane in the PDMS-n-hexane mixed solution, soak the glass fiber filter membrane 5 times repeatedly to ensure that the glass fiber filter membrane is completely soaked by the PDMS-n-hexane mixed solution;

[0090] (4) Take out the glass ...

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Abstract

The invention discloses a super-hydrophobic demulsifying oil-water separation membrane material, a preparation method and application thereof. The method comprises the following steps: dissolving polydimethylsiloxane in an organic solvent, and uniformly stirring to obtain a mixed solution, wherein the mass concentration of the polydimethylsiloxane in the mixed solution is 1-10%; attaching the mixed solution to the surface of a glass fiber filter membrane until the glass fiber filter membrane is completely wetted by the mixed solution; and taking out the wetted glass fiber filter membrane, naturally drying, and carrying out high-temperature curing treatment after the organic solvent is completely volatilized to obtain the super-hydrophobic demulsifying oil-water separation membrane material. According to the invention, a polydimethylsiloxane (PDMS) solution is combined with a glass fiber filter membrane to load the polydimethylsiloxane (PDMS) solution on the surface of the glass fiber filter membrane, so that the contact angle between the prepared super-hydrophobic demulsifying oil-water separation membrane material and water is greater than 150 DEG, the contact angle between the super-hydrophobic demulsifying oil-water separation membrane material and oil is 0 DEG, and the super-hydrophobic demulsifying oil-water separation membrane material has a demulsifying function, has a good separation effect on various water-in-oil emulsions in cooperation with a hydrophobic and oleophylic modification mode, and has separation efficiency of 97% or above.

Description

technical field [0001] The invention relates to the technical fields of environmental protection and oil-water separation, in particular to a superhydrophobic demulsification oil-water separation membrane material and its preparation method and application. Background technique [0002] Modern industrial activities involving oil production (such as transportation, pharmaceutical and food industries) have been generating large amounts of oily wastewater, posing a great threat to ecosystems. With the increasing demand for clean water and the limited resources available for water supply, the treatment of oily wastewater is a worldwide problem. Since the oil-water mixture (free mixture, dispersion or emulsion) is a multiphase system, its separation is essentially an interface problem. [0003] Recent research has focused on the design and production of novel materials with exceptional wettability to address this issue. In particular, these isolated materials often exhibit diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/70B01D67/00B01D17/04
CPCB01D71/70B01D67/0079B01D17/085B01D17/047B01D2325/38
Inventor 何锋黄贤亮万武波杨壮
Owner ZHEJIANG UNIV OF TECH
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