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Hydrogel, oil-water separator as well as preparation method and application of hydrogel

An oil-water separator, hydrogel technology, applied in separation methods, liquid separation, grease/oily substance/float removal devices, etc. The effect of good stability, low cost and long life

Active Publication Date: 2018-09-07
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As reported in the literature (Adv.Mater.2011, 23, 4270-4273; Adv.Funct.Mater.2015, 25, 5368–5375), hydrogels coated with filter paper and stainless steel mesh are used as oil-water separators for oil-water separation, but there are Problems such as high swelling rate and failure to repair after damage lead to repeated use

Method used

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  • Hydrogel, oil-water separator as well as preparation method and application of hydrogel
  • Hydrogel, oil-water separator as well as preparation method and application of hydrogel
  • Hydrogel, oil-water separator as well as preparation method and application of hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Example 1: P(AM-co-AA) / CS / MPS-SiO with different proportions of AA and AM 2 / Preparation of semi-interpenetrating hydrogels and simple oil-water separators.

[0067] Weigh different proportions of acrylamide and acrylic acid, dissolve them in a certain volume of deionized water and add them to a 50ml round bottom flask, then add a certain amount of double bond modified silica nanoparticles and fully disperse them under ultrasonic conditions. A transparent mixture A (a suspension) was obtained.

[0068] Then measure a certain amount of chitosan and add it therein, and after adjusting its pH to be acidic, stir ultrasonically to dissolve all the chitosan to obtain a viscous mixed solution B.

[0069] After passing nitrogen gas under magnetic stirring, add an initiator (a thermal initiator such as ammonium persulfate) and a catalyst to obtain a mixed solution C.

[0070] Seal the mixed solution C in a transparent mold and place it under sunlight for one day to obtain fiv...

Embodiment 2

[0072] Example 2: In this example, to investigate the mechanical properties of various hydrogels prepared by the present invention, the inventor prepared hydrogels as test specimens for testing tensile stress and strain. The test process is as follows:

[0073] P(AM-co-AA) / CS / MPS-SiO of different proportions AM and AA obtained from Example 1 2 Semi-interpenetrating composite hydrogels. The obtained hydrogel was prepared as 10mm in diameter and 5 specimens with a height of 20mm at room temperature at a stretching rate of 30mm / min, and a tension machine was used to measure the tensile stress and strain of the prepared hydrogel. The result is as figure 1 shown. It can be seen that P(AM-co-AA) / CS / MPS-SiO when AM:AA is 9:1 2 The semi-interpenetrating composite hydrogel has the most superior tensile properties.

Embodiment 3

[0074]Example 3: In order to investigate the mechanical properties of various hydrogels prepared by the present invention, the inventor prepared hydrogels as test specimens for the test of compressive stress and strain. The test process is as follows:

[0075] The hydrogel obtained in Example 1 is prepared as a diameter of 10mm, each of 5 specimens with a height of 10mm is at room temperature with a tensile rate of 5mm / min, and the compressive stress strain of the prepared hydrogel is measured with a universal tensile machine . P(AM-co-AA) / CS / MPS-SiO of different proportions AM and AA obtained from Example 1 2 The semi-interpenetrating composite hydrogel was tested for tensile stress and strain, and the results are as follows Figure 2 to Figure 7 shown. It can be seen that P(AM-co-AA) / CS / MPS-SiO when AM:AA is 9:1 2 Semi-interpenetrating composite hydrogels have the most superior compressive properties.

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Abstract

The invention provides hydrogel, an oil-water separator as well as a preparation method and application of the hydrogel and belongs to the field of environment protection. The hydrogel is of an organic and inorganic compound double-network crosslinking structure, wherein the double-network crosslinking structure is an organic polymer of an organic component; the organic polymer comprises an acrylamide and acrylic acid copolymer with a crosslinking form, and chitosan; an inorganic component is silicon dioxide particles, is dispersed in the double-network crosslinking structure and is chemicallybonded with the copolymer. The hydrogel has a good tensile property, is easy to process and has an excellent super-oleophobic capability. According to the oil-water separator based on the hydrogel, the separation efficiency on various oil-water mixtures commonly reaches 99 percent or more.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a hydrogel, an oil-water separator and a preparation method and application thereof. Background technique [0002] At present, energy and environmental issues are still severe problems facing the development of human society. With the development of industry, industrial oily wastewater is increasing from time to time around the world, as well as frequent oil spill accidents. Environmental and economic needs require materials that can effectively separate oil and water. Scientists around the world have developed various solutions for this. Among them, the preparation and use of oil-water separator is one of the most effective and convenient methods. [0003] Hydrophilic and underwater superoleophobic hydrogel coatings with 3D network structures are constructed from rough nanostructured hydrogel coatings and micron-scale porous metal substrates. It can selectively and effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J3/24C08L33/26C08L5/08C08K3/36C02F1/40
CPCC02F1/40C08J3/075C08J3/246C08J2333/26C08J2405/08C08K3/36
Inventor 何培新张玉红苏铭吉刘勇
Owner HUBEI UNIV
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