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Underwater super-oleophobic antifreeze organic hydrogel and preparation method and application thereof, coating, oil-water separation mesh and preparation method thereof

An underwater superoleophobic, oil-water separation net technology, applied in the directions of gel preparation, liquid separation, separation methods, etc., can solve the problems of poor mechanical properties, expensive raw materials, and will be frozen, and achieves good oil-water separation effect, comprehensive The effect of good performance and low preparation cost

Inactive Publication Date: 2019-07-19
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current composite materials prepared by hydrogel are not only affected by factors such as poor stability and poor mechanical properties, but for oil-water separation materials, the problems of complex preparation methods and expensive raw materials need to be solved.
On the other hand, traditional hydrogel composites contain a large amount of solvent water, which will inevitably be frozen at sub-zero temperatures, which limits their application in oil-water separation in cold regions.

Method used

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  • Underwater super-oleophobic antifreeze organic hydrogel and preparation method and application thereof, coating, oil-water separation mesh and preparation method thereof
  • Underwater super-oleophobic antifreeze organic hydrogel and preparation method and application thereof, coating, oil-water separation mesh and preparation method thereof
  • Underwater super-oleophobic antifreeze organic hydrogel and preparation method and application thereof, coating, oil-water separation mesh and preparation method thereof

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preparation example Construction

[0035] The invention provides a method for preparing an underwater super oleophobic and antifreeze organic hydrogel, which is used for preparing the underwater super oleophobic and antifreeze organic hydrogel provided by the invention. The method comprises: mixing polyvinyl alcohol, antifreeze liquid and nanoparticles uniformly and then freezing to obtain an organic hydrogel. Specific steps are as follows:

[0036] S1. Mix polyvinyl alcohol and antifreeze evenly to obtain a mixed solution.

[0037] Specifically, antifreeze and polyvinyl alcohol are placed in a container. In order to enable the antifreeze and polyvinyl alcohol to disperse evenly with each other, after the two are added to the container, the ambient temperature is raised to 75-99°C, and the stirring is continued for at least 60°C. ~ min to obtain a mixed solution that is well mixed.

[0038] S2, uniformly mixing the mixed solution and the nanoparticles.

[0039] Specifically, keep the mixed solution at an env...

Embodiment 1

[0048] The preparation method of the underwater super-oleophobic antifreeze organic hydrogel provided in this embodiment includes:

[0049] Put 1.6g of polyvinyl alcohol and 20ml of antifreeze into a 100ml beaker, raise the ambient temperature to 95°C, and keep stirring for 60min to obtain a clear mixed solution.

[0050] Then, continue to maintain 95°C, add 0.08g of nanoparticles to the clear mixed solution, and keep stirring until the nanoparticles are evenly dispersed into the mixed solution, and the underwater superoleophobic and antifreeze organic hydrogel provided in this example is obtained.

[0051] In this embodiment, the antifreeze solution is an aqueous solution of ethylene glycol, and in the aqueous solution of ethylene glycol, the mass ratio of ethylene glycol to water is 4:1. The nanoparticles are silica nanoparticles.

[0052] The preparation method of the oil-water separation net provided in this embodiment includes:

[0053] Choose a metal mesh with a pore s...

Embodiment 2

[0055] The preparation method of the underwater super-oleophobic antifreeze organic hydrogel provided in this embodiment includes:

[0056] Put 1g of polyvinyl alcohol and 20ml of antifreeze into a 100ml beaker, raise the ambient temperature to 75°C, and keep stirring for 100min to obtain a clear mixed solution.

[0057] Then, continue to maintain 75 ° C, add 0.1 g of nanoparticles to the clear mixed solution, and keep stirring until the nanoparticles are evenly dispersed into the mixed solution, and the underwater super oleophobic antifreeze organic hydrogel provided in this example is obtained.

[0058] In this embodiment, the antifreeze solution is an aqueous glycerin solution, and in the aqueous glycerin solution, the mass ratio of glycerin to water is 1:2. The nanoparticles are aluminum hydroxide nanoparticles.

[0059] The preparation method of the oil-water separation net provided in this embodiment includes:

[0060] Choose a metal mesh with a pore size of 30 μm, imm...

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Abstract

The invention relates to the technical field of oil-water separation, and provides an underwater super-oleophobic antifreeze organic hydrogel, comprising polyvinyl alcohol, nanoparticles and antifreeze. A preparation method of the underwater super-oleophobic antifreeze organic hydrogel comprises the following step: uniformly mixing polyvinyl alcohol, the antifreeze and nanoparticles. An oil-waterseparation coating is prepared from the organic hydrogel. An oil-water separation mesh comprises a mesh body, and the surface of the mesh body is covered with the coating formed by the underwater super-oleophobic antifreeze organic hydrogel. A preparation method of the oil-water separation mesh is used for preparing the oil-water separation mesh, comprising the following steps: immersing the meshbody in the antifreeze organic hydrogel, and freezing after taking out. The organic hydrogel provided by the invention has the performances of underwater super-oleophobicity and freezing resistance, and is suitable for being applied to the oil-water separation process. The oil-water separation mesh provided by the invention is further suitable for the oil-water separation in various extreme environments, and good in separation effect.

Description

technical field [0001] The invention relates to the technical field of oil-water separation, in particular to an underwater super-oleophobic and antifreeze organic hydrogel and its preparation method, application, coating, oil-water separation net and its preparation method. Background technique [0002] At present, with the increasing amount of industrial oily wastewater, oil-water separation has always been the focus of global attention. In order to solve this problem, various oil-water separation materials have been developed. Among them, the superhydrophilic and underwater superoleophobic hydrogel-coated grids are constructed from hydrophilic hydrogels and micron-scale porous metal substrates. It can selectively and efficiently (>99%) separate oil / water mixtures (e.g. vegetable oil, gasoline, diesel) by gravity. In the separation process, the super-affinity for water allows water to pass through easily, and the underwater super-oleophobic interface with low affinity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00B01J20/28B01J20/26B01J20/02B01D17/022B01J20/30C02F1/28
CPCB01D17/0202B01J13/0056B01J13/0065B01J13/0069B01J20/02B01J20/261B01J20/28011B01J20/28047C02F1/281C02F1/285
Inventor 何培新张玉红刘勇赵萍萍吴莉莉
Owner HUBEI UNIV
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