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Preparation method of oil-water separation fabric with super-hydrophilic and super-oleophobic properties

A technology of oil-water separation and super-oleophobicity, which is applied in the fields of functional materials, chemistry and chemical engineering, and can solve problems such as difficulty in mass production, high production cost, and health hazards

Active Publication Date: 2021-05-18
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these reported omentums can play a certain role in oil-water separation, their production costs are high, the production process is complicated, and the processing conditions are harsh, so it is difficult to achieve mass production. It is especially easy to be blocked by oil dirt and difficult to clean, which leads to the loss of the effect of oil-water separation
[0004] The document International Journal of Biological Macromolecules, 2019, 136:13-19 reported that the metal mesh was coated with a hydrophilic gel layer by cross-linking sodium alginate with calcium ions, and the gel layer was deposited multiple times to form a water Under the super oleophobic metal mesh, but the simple use of hydrophilic polymers cannot form a rough surface structure, and due to the poor adhesion of calcium alginate gel, its reusability is low
In the Chinese patent with the publication number CN107080976A, the hydrophilic material is sprayed onto the substrate by cold spraying, and then the adhesion is improved by high-temperature calcination. In this method, toxic solvents such as tetrahydrofuran and acetone are used in the preparation process, which is harmful to the operator's body. Health hazards and environmental pollution

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Preparation method of oil-water separation fabric with super-hydrophilic and super-oleophobic properties
  • Preparation method of oil-water separation fabric with super-hydrophilic and super-oleophobic properties
  • Preparation method of oil-water separation fabric with super-hydrophilic and super-oleophobic properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) A 1000-mesh (15 μm pore size) nylon mesh (5 cm×5 cm) was cleaned and dried at room temperature.

[0032] (2) Put a 250mL single-mouth bottle in a 95°C oil bath, add 2.5g polyvinyl alcohol (polymerization degree 1700), 150mL deionized water (150g) into the single-mouth bottle, stir and dissolve at 95°C for 2 hours to obtain a colorless Clear polyvinyl alcohol solution.

[0033] (3) At room temperature, add 1 g of sodium alginate and 150 mL of deionized water (150 g) into a 250 mL single-necked bottle, stir and dissolve for 2 hours to obtain a light yellow transparent sodium alginate solution.

[0034] (4) Take 60mL of the solution from step (2) and add it to a 100mL beaker, then take 40mL from step (3) and put it into a 100mL beaker, and mix evenly to obtain 100mL of a mixed solution of polyvinyl alcohol and sodium alginate.

[0035] (5) Take 0.62g of boric acid (ie 0.01mol) and 2.11g of calcium chloride (ie 0.02mol) into a 100mL beaker, then add 100mL of deionized ...

Embodiment 2

[0042] (1) After cleaning a 400-mesh nylon net (5 cm x 5 cm) with a pore size of 38 μm, dry it at room temperature;

[0043] (2) Put a 250mL one-mouth bottle in a 95°C oil bath, add 1.5g polyvinyl alcohol (polymerization degree 1700), 150mL deionized water (150g) into the one-mouth bottle, stir and dissolve at 95°C for 2 hours to obtain a colorless Transparent polyvinyl alcohol solution;

[0044] (3) At room temperature, add 0.75g sodium alginate and 150mL deionized water (150g) into a 250mL single-necked bottle, stir and dissolve for 2 hours to obtain a light yellow transparent sodium alginate solution;

[0045] (4) Take 50mL of the solution from step (2) and add it to a 100mL beaker, then take 50mL from step (3) and add it to a 100mL beaker, and mix evenly to obtain 100mL of a mixed solution of polyvinyl alcohol and sodium alginate;

[0046] (5) Add 0.62g of boric acid and 1.59g of copper sulfate into a 100mL beaker, then add 100mL of deionized water, and stir at room tempe...

Embodiment 3

[0051] (1) After cleaning the polyester net (5 cm × 5 cm) of 400 mesh (aperture 38 μm), dry it at room temperature;

[0052] (2) Put a 250mL single-mouth bottle in a 95°C oil bath, add 3g of polyvinyl alcohol (polymerization degree 2400), 150mL of deionized water (150g) into the single-mouth bottle, stir and dissolve at 95°C for 2 hours to obtain a colorless and transparent polyvinyl alcohol solution;

[0053] (3) At room temperature, add 2 g of sodium alginate and 150 mL of deionized water (150 g) into a 250 mL single-necked bottle, stir and dissolve for 2 hours to obtain a light yellow transparent sodium alginate solution;

[0054] (4) Take 40mL of the solution from step (2) and add it to a 100mL beaker, then take 60mL from step (3) and add it to a 100mL beaker, mix evenly to obtain 100mL of a mixed solution of polyvinyl alcohol and sodium alginate;

[0055] (5) Add 0.62g of boric acid and 2.08g of barium chloride into a 100mL beaker, then add 100mL of deionized water, and ...

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Abstract

The invention relates to a preparation method of oil-water separation fabric with super-hydrophilic and super-oleophobic properties. The method comprises the following steps: sequentially immersing fabric into a hydrophilic polymer mixed solution, a curing solution and a precipitation solution, wherein the fabric is immersed into each solution for 1-5 minutes, taking out the fabric, and drying the fabric at 45-55 DEG C for 0.5-1 hour to obtain the super-hydrophilic-super-oleophobic oil-water separation fabric, wherein the hydrophilic polymer mixed solution is a mixed solution of a polyvinyl alcohol solution and a sodium alginate solution, and the volume ratio of the polyvinyl alcohol solution to the sodium alginate solution is (10: 1)-(1: 10). According to the method, secondary pollution is avoided, cleaning is easy, repeated use can be achieved, the fabric does not need to be modified, fabric fibers are wrapped with the hydrogel hydrophilic material with the interpenetrating network only in a cross-linking curing mode, and the excellent water retention and oil stain prevention performance is achieved.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering and functional materials, and in particular relates to a preparation method and application of an oil-water separation fabric with superhydrophilic-superoleophobic properties. Background technique [0002] In recent years, with the rapid development of industry, the global demand for energy has increased and the exploitation of crude oil has been intensified. At the same time, the increase of oil spills and oil spill accidents has become one of the focuses of people's attention. Traditional measures to deal with large-scale oil spills include chemical dispersant degradation, in-situ burning and vacuum oil absorption. However, these methods are not only expensive, relatively inefficient, and even cause secondary pollution in practical application. What's more, in order to recover precious oil resources, there is an urgent need to selectively remove oil from water. Therefore, the de...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/333D06M15/13D06M11/82D06M11/155D06M11/56D06M11/65B01D17/022D06M101/34D06M101/36D06M101/32D06M101/24
CPCD06M15/333D06M15/13D06M11/82D06M11/155D06M11/56D06M11/65B01D17/02D06M2200/01D06M2200/11D06M2101/34D06M2101/36D06M2101/32D06M2101/24
Inventor 张旭郭豪东王小梅
Owner HEBEI UNIV OF TECH