Preparation method of modified polypropylene oil-water separation membrane and modified polypropylene oil-water separation membrane prepared by preparation method

A technology of oil-water separation membrane and polypropylene membrane, which is applied in the field of membrane materials, can solve the problems of low oil-water separation efficiency, poor mechanical properties, and easy pollution of the membrane, and achieve high oil-water separation efficiency, high oil-water separation efficiency, and increased hydrophilicity Effect

Active Publication Date: 2021-02-12
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although membrane technology has made great progress, the problem of easy fouling of membranes in the separation process is still one of the most challenging problems in the separation industry
Polysulfone (PSf), polyethersulfone (PES), polyvinylidene fluoride (PVDF), polyacrylonitrile (PAN) and cellulose acetate (CA), which are commonly used in the preparation of microfiltration / ultrafiltration membranes, although the cost is lower than that of inorganic Material ceramic membrane, but it is easy to scale, resulting in a decrease in oil-water separation efficiency; the strength and long-term stability of the separation membrane are also important considerations when treating oily sewage. A single polymer membrane or nanofiber membrane is commonly used as a separation material There are problems such as poor mechanical properties and weak anti-fouling properties

Method used

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  • Preparation method of modified polypropylene oil-water separation membrane and modified polypropylene oil-water separation membrane prepared by preparation method
  • Preparation method of modified polypropylene oil-water separation membrane and modified polypropylene oil-water separation membrane prepared by preparation method
  • Preparation method of modified polypropylene oil-water separation membrane and modified polypropylene oil-water separation membrane prepared by preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of a modified polypropylene oil-water separation membrane material, the specific steps are as follows:

[0032] (1) Put 2g of PSMA and 100ml of water into a three-necked flask, add 6ml of ammonia water, stir and hydrolyze at 50°C, until the hydrolysis is complete, the system becomes a colorless and transparent solution, add a few drops of sulfuric acid solution to neutralize, cool to room temperature, and filter with suction A solid product was obtained, which was washed twice with deionized water and dried at 50° C. for 24 hours to obtain H-PSMA.

[0033] (2) Take 1g of H-PSMA and 0.6g of PVA in 15ml of deionized water, dissolve it at 90°C for 1h to make it completely dissolved, cool to room temperature, take commercially available 50% glutaraldehyde aqueous solution (according to the molar ratio of hydroxyl and aldehyde groups) Dilute to 5ml at 1:0.5, add to the above solution, and stir at room temperature to obtain H-PSMA / PVA modified solution. ...

Embodiment 2

[0036] A kind of preparation method of modified polypropylene oil-water separation membrane, concrete steps are as follows:

[0037] (1) Take 2g of PSMA in 100ml of deionized water, add 6ml of ammonia water, stir and hydrolyze at 50°C, until the hydrolysis is complete, the system becomes a colorless transparent solution, add a few drops of sulfuric acid solution to neutralize, cool to room temperature, and filter to obtain a solid product , the solid product was washed twice with deionized water, and dried at 50°C for 24 hours to obtain H-PSMA.

[0038] (2) Take 1g H-PSMA and 0.2g PVA in 15ml deionized water, dissolve it at 90°C for 1 hour to make it completely dissolved, cool to room temperature, take commercially available 50% glutaraldehyde aqueous solution (the molar ratio of hydroxyl and aldehyde groups is 1:0.3) was diluted to 5ml, added to the above solution, and stirred at room temperature to obtain a cross-linked H-PSMA / PVA modified solution.

[0039] (3) Soak the po...

Embodiment 3

[0041] A kind of preparation method of modified polypropylene oil-water separation membrane, concrete steps are as follows:

[0042] (1) Add 2g of PSMA to 100ml of deionized water, add 6ml of ammonia water, stir and hydrolyze at 50°C, wait until the hydrolysis is complete, the system becomes a colorless transparent solution, add a few drops of sulfuric acid solution to neutralize, cool to room temperature, and obtain a solid product by suction filtration , the solid product was washed twice with deionized water, and dried at 50°C for 24 hours to obtain H-PSMA.

[0043](2) Take 1g of H-PSMA and 1g of PVA in deionized water, dissolve it at 90°C for 1h to dissolve completely, cool to room temperature, take commercially available 50% glutaraldehyde aqueous solution (according to the molar ratio of hydroxyl and aldehyde groups is 1: 0.2), added to the above solution to make the modified solution concentration 0.02g / ml, stirring at room temperature.

[0044] (3) Soak the polypropyl...

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PUM

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Abstract

The invention relates to a preparation method of a modified polypropylene oil-water separation membrane and the modified polypropylene oil-water separation membrane prepared by the preparation method,and the preparation method comprises the following steps: hydrolyzing a styrene maleic anhydride copolymer PSMA under an alkaline condition, and adding acid for neutralization to obtain a styrene maleic anhydride copolymer hydrolysate H-PSMA; 2) adding H-PSMA and polyvinyl alcohol PVA into water, heating to dissolve, cooling, adding an aldehyde cross-linking agent aqueous solution, and reacting to obtain a cross-linked product modified solution of H-PSMA and PVA; and soaking the polypropylene membrane in the modified solution, and carrying out suction filtration to obtain the cross-linked modified polypropylene oil-water separation membrane. The polypropylene oil-water separation membrane with good oil-water separation efficiency is prepared on the basis of the method disclosed by the invention. The prepared modified polypropylene film does not need an organic solvent and is pollution-free. H-PSMA and PVA are added to increase the hydrophilicity of the membrane, hydrophilic groups carboxyl and hydroxyl are beneficial to rapid passing of water molecules, so that oil-water separation is more efficient, and PVA and H-PSMA can form a cross-linked structure to increase the acid and alkali corrosion resistance of the separation membrane.

Description

technical field [0001] The invention relates to the technical field of membrane materials, in particular to a preparation method of a modified polypropylene oil-water separation membrane and the prepared modified polypropylene oil-water separation membrane. Background technique [0002] Traditional oil-water separation methods include physical methods and chemical methods: physical methods such as activated carbon, organic clay, zeolite, etc. will absorb water while absorbing oil, making the separation process cumbersome and inefficient; chemical methods such as oxidation, electrochemical process, photocatalytic treatment , ozone treatment and demulsification will use toxic compounds, which will increase the cost and produce secondary pollution. In the past ten years, the application of membrane technology has become an important separation technology. Its advantages are that it can work without adding other chemicals, has low energy demand, and the process is simple and eas...

Claims

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Application Information

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IPC IPC(8): B01D71/26B01D67/00B01D17/022
CPCB01D71/26B01D67/0006B01D17/02B01D2325/24B01D2325/30Y02A20/131
Inventor 郭雅妮张宇
Owner WUHAN INSTITUTE OF TECHNOLOGY
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