Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method and application of superhydrophilic gel composite membrane

A composite membrane and super-hydrophilic technology, applied in separation methods, chemical instruments and methods, membranes, etc., can solve the problems of limited types of oily sewage, poor chemical resistance, and low separation efficiency, and achieve a simple and easy preparation method Good mechanical properties and wide range of sources

Inactive Publication Date: 2020-01-24
JIANGSU UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in the application of membrane materials based on special wettability, such as poor swelling resistance of the membrane, poor chemical resistance, rapid flux decay, limited types of oily sewage treatment, low separation efficiency, etc. These problems need to be resolved

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method and application of superhydrophilic gel composite membrane
  • A kind of preparation method and application of superhydrophilic gel composite membrane
  • A kind of preparation method and application of superhydrophilic gel composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of blended film: Take 3g of polyvinylidene fluoride (PVDF) powder and 1g of polyethylene glycol (PEG) and dissolve them in 30ml of N-methylpyrrolidone (NMP), stir mechanically at 50°C for 12h, and use phase inversion Made of PVDF blend membrane.

[0026] (2) Take 9ml of ammonia water, 16.5ml of ethanol, and 25ml of deionized water to prepare A solution, add the blended film and dissolve it in a 250ml round bottom flask, stir with a magnet, and configure B solution: 45ml of ethanol and 4.5ml of tetraethyl silicate (TEOS) was mixed and poured into solution A, sealed the mouth of the flask, stirred at room temperature for 3 hours, took out the membrane, washed with ethanol and water, and dried at 40 degrees to make PVDF@SiO 2 membrane.

[0027] (3) Thoroughly dissolve 0.1g chitosan in 1ml glacial acetic acid and 50ml deionized water, add PVDF@SiO 2 membrane, removed after 10 min, and air-dried to make PVDF@SiO 2 @CS gel film.

[0028] figure 1 Superhyd...

Embodiment 2

[0032] (1) Preparation of blend film: Dissolve 4.5g of polyvinylidene fluoride (PVDF) powder and 1.5g of polyethylene glycol (PEG) into 30ml of N-methylpyrrolidone (NMP), stir mechanically at 50°C for 12h, and cast The membrane solution was poured on a glass plate and evenly scraped with a glass rod, then slowly put into deionized water to make a PVDF blend membrane.

[0033] (2) Take 13.5ml of ammonia water, 24.75ml of ethanol, and 37.5ml of deionized water to prepare A solution, add the blended film and dissolve it in a 250ml round bottom flask, stir with a magnet, and configure B solution: 67.5ml of ethanol and 6.75ml of silicic acid Mix tetraethyl ester (TEOS) and pour it into solution A, seal the mouth of the flask, stir at room temperature for 3 hours, wash with ethanol and water three times, and dry at 40 degrees to obtain PVDF@SiO 2 membrane.

[0034] (3) Thoroughly dissolve 0.1g chitosan in 1ml glacial acetic acid and 50ml deionized water, add PVDF@SiO 2 membrane, r...

Embodiment 3

[0036] (1) Preparation of blended membrane: Take 6g of polyvinylidene fluoride (PVDF) powder and 2g of polyethylene glycol (PEG) and dissolve it in 30ml of N-methylpyrrolidone (NMP), stir mechanically at 50°C for 12h, and pass phase inversion Made of PVDF blend membrane.

[0037] (2) Take 19ml of ammonia water, 33ml of ethanol, and 50ml of deionized water to make A solution, add the blend film and dissolve it in a 250ml round bottom flask, stir with a magnet, and configure B solution: 90ml of ethanol and 9ml of tetraethyl silicate (TEOS ) after mixing evenly, pour it into solution A, seal the mouth of the flask, stir for 3 hours, wash with ethanol and water, and dry at 40 degrees to make PVDF@SiO 2 membrane.

[0038] (3) Thoroughly dissolve 0.1g chitosan in 1ml glacial acetic acid and 50ml deionized water, add PVDF@SiO 2 membrane, removed after 10 min, and air-dried to make PVDF@SiO 2 @CS gel composite film.

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a preparation method and applications of a superhydrophilic gel composite film. The preparation method comprises following steps: step 1, polyvinylidene fluoride powder and polyethylene glycol are dissolved in N-methylpyrrolidone, and mechanical stirring is carried out so as to obtain a film casting solution; the film casting solution is poured onto a glass plate, and is spread to be uniform and flat with a glass rod; the glass plate is immersed into deionized water slowly so as to obtain a blended film; step 2, ammoniacal liquor, ethanol, and deionized water are mixed so as to obtain a mixed solution A, the blended film is immersed in the mixed solution A; ethanol and tetraethyl orthosilicate are mixed so as to obtain a mixed solution B; the mixed solution B is added into the mixed solution A containing the blended film, stirring reaction is carried out at room temperature at sealing conditions so as to obtain PVDF@SiO2 film; chitosan is dissolved in a mixed solution of acetate acid gracial and deionized water so as to obtain a mixed solution C; the PVDF@SiO2 film is immersed into the mixed solution C for reaction, after reaction, and obtained product is taken out from the mixed solution C, and is subjected to air drying so as to obtain the superhydrophilic gel composite film. The preparation method is simple and convenient, and large-scale production can be realized.

Description

technical field [0001] The invention relates to a preparation method of a superhydrophilic gel composite membrane, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] Environmental problems have become a major challenge for human beings. Smog, sewage, waste residue, waste gas, white pollution, etc. are all seriously threatening the earth's environment and human health. The emergence of each of these problems is brought about by the development of human beings themselves, and the solution of each problem will also require arduous efforts of scientific and technological workers. The treatment of wastewater is undoubtedly a win-win move that can solve environmental problems and water resource shortages, and achieve the effect of killing two birds with one stone. Among them, a large amount of oily wastewater caused by crude oil exploitation, marine oil spill accidents, and domestic sewage has become a major ch...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/34B01D69/12B01D69/02B01D67/00B01D17/022
CPCB01D17/02B01D67/0079B01D69/02B01D69/12B01D71/34B01D2325/36
Inventor 崔久云谢阿田刘思玮李春香闫永胜周志平
Owner JIANGSU UNIV