Superhydrophilic underwater-superlipophobic oil-water separation membrane, and preparation method thereof

An underwater superoleophobic, oil-water separation membrane technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc. problem, to achieve the effect of low cost, inhibition of movement, and reduction of crystallinity

Inactive Publication Date: 2018-01-16
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current oil-water separation membranes are hydrophobic oil-water separation membranes. Since water has a higher density than oil, it will form a barrier layer to prevent oil from penetrating, so it is easy to cause membrane blockage, resulting in membrane flux and separation efficiency. Greatly reduced
The emergence of underwater super-oleophobic oil-water separation membrane has greatly improved the problem of membrane fouling, but the existing underwater super-oleophobic oil-water separation membrane itself does not have high mechanical strength, which greatly affects the reuse performance of the separation membrane.

Method used

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  • Superhydrophilic underwater-superlipophobic oil-water separation membrane, and preparation method thereof
  • Superhydrophilic underwater-superlipophobic oil-water separation membrane, and preparation method thereof
  • Superhydrophilic underwater-superlipophobic oil-water separation membrane, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] In this example, see figure 1 and figure 2 , a method for preparing an underwater super-oleophobic oil-water separation membrane with a polymer and nanoparticle composite coating, comprising the following steps:

[0029] a. Pretreatment of the fabric mesh base material: use stainless steel wire mesh with a mesh number of not less than 300 mesh as the fabric mesh base material, and clean the stainless steel mesh with anhydrous acetone ultrasonically for 15 minutes to remove organic matter on the surface of the stainless steel mesh, Then use absolute ethanol to wash away the residual acetone on the surface of the stainless steel wire mesh, continue to ultrasonically clean it with deionized water for 15 minutes to remove impurities on the surface of the stainless steel mesh, and finally dry the clean stainless steel wire mesh at 60°C for 1 hour to obtain a clean and dry product. stainless steel wire mesh;

[0030] b. preparing an aqueous solution of polyvinyl alcohol 17...

Embodiment 2

[0034] This embodiment is basically the same as Embodiment 1, especially in that:

[0035] In this example, see figure 1 and figure 2 , a method for preparing an underwater super-oleophobic oil-water separation membrane with a polymer and nanoparticle composite coating, comprising the following steps:

[0036]a. Pretreatment of fabric omentum base material: use nylon cloth with a mesh number of not less than 300 mesh as the fabric omentum base material, first clean the nylon cloth with anhydrous acetone ultrasonically for 15 minutes, remove the organic matter on the surface of the nylon cloth, and then clean it with anhydrous acetone Rinse off the residual acetone on the surface of the nylon cloth with water and ethanol, continue ultrasonic cleaning with deionized water for 15 minutes to remove impurities on the surface of the nylon cloth, and finally dry the clean nylon cloth at 60°C for 1 hour to obtain a clean and dry nylon cloth;

[0037] b. preparing an aqueous solutio...

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Abstract

The invention discloses a superhydrophilic underwater-superlipophobic oil-water separation membrane, and a preparation method thereof. According to the preparation method, stainless steel wire mesh ornylon cloth are modified with a polyvinyl alcohol-silicon dioxide composite coating so as to change the surface properties and provide the stainless steel wire mesh or nylon cloth with super hydrophilicity and underwater super lipophobicity; dip coating process is adopted so as to realize loading of the surface of the stainless steel wire mesh or nylon cloth with polyvinyl alcohol-silicon dioxide, wherein a polyvinyl alcohol aqueous solution and an ethanol dispersion solution of silicon dioxide are prepared firstly, and are mixed via ultrasonic treatment, the pH value is adjusted, and a cross-linking agent is added so as to obtain a coating solution, and dip coating is adopted so as to obtain the superhydrophilic/underwater-superlipophobic oil-water separation membrane. The superhydrophilic underwater-superlipophobic oil-water separation membrane possesses both super hydrophilicity and underwater super lipophobicity, is suitable for treatment of sewage containing n-hexane, cyclohexane, diesel oil, soya-bean oil, lubricating oil, and silicone oil, and possesses excellent oil water separation performance.

Description

technical field [0001] The invention relates to an oil-water separation membrane and a preparation method thereof, in particular to a super-oleophobic oil-water separation membrane and a preparation method thereof, which are applied in the technical field of oily sewage treatment devices and processes. Background technique [0002] With the rapid growth of industry and social economy, industries such as petroleum, natural gas, petrochemical, pharmaceutical, metallurgy and food have produced a large amount of oily sewage, especially in the petroleum industry. According to statistics, about 100,000 oil is directly poured into the offshore in my country every year. tons, accounting for nearly 10% of the world's total emissions, and the level of pollution is becoming increasingly serious. Oil pollution not only caused serious damage to the ecological environment, but also caused a lot of waste of water resources. Therefore, the treatment of oily sewage is an effective way to rati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D71/38B01D71/76B01D69/12B01D69/02B01D67/00
Inventor 张新颖王超群胡晓昕曹丽亚袁晓宇苏畅刘晓艳
Owner SHANGHAI UNIV
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