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Modified polymer film and preparation method and application thereof

A polymer film and modification technology, which is applied in the direction of chemical instruments and methods, film, film technology, etc., can solve the problems of uneven coating film thickness, uneven coating film thickness, large loss of raw materials, etc., and achieve good anti-protein Effects of adsorption capacity and good antioxidant capacity

Active Publication Date: 2020-09-22
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the above prior art, the dip coating method has high production efficiency and simple operation, but the thickness of the coating film is uneven, easy to pollute the environment, and the loss of raw materials is relatively large
Spray coating is suitable for base films with different surface morphology, but the resulting sheets have poor interconnectivity
The lamellar interconnection formed by spin coating is excellent, but the thickness of the coating film is easy to be uneven, and it must be done on a smooth surface.

Method used

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  • Modified polymer film and preparation method and application thereof
  • Modified polymer film and preparation method and application thereof
  • Modified polymer film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] The preparation of embodiment 1 multilayer GA / MXene modified polymer film

[0114] (1)Na + Preparation of intercalated MXene: Mix 10mL 9mol / L hydrochloric acid solution with 0.5g lithium fluoride powder, stir for 5min to obtain an etching solution, add 0.5g titanium aluminum carbide powder to the etching solution and seal the container, at 35°C Stir for 24 hours for etching; after the etching, centrifuge at 12000 rpm for 5 minutes, pour off the supernatant, then add deionized water to wash, repeat the above steps 8-10 times; after pouring the supernatant for the last time, pour the suspension Add 10 mL of NaOH solution with a concentration of 0.05 g / mL and stir for 2 hours, then wash the precipitated powder with a large amount of deionized water until the pH of the solution after centrifugation is 7-8, and disperse the obtained slurry to a small amount Deionized water for standby to obtain a dispersion liquid, the concentration of the dispersion liquid is 0.01-0.05g / L....

Embodiment 2

[0121] The preparation of embodiment 2 multilayer GA / MXene modified polymer film

[0122] (1)Na + The preparation method of intercalation MXene, the synthesis of sulfanilic acid diazonium salt and the sulfonation modification of MXene are the same as in Example 1.

[0123] (2) Preparation of polymer membrane: polysulfone powder, porogen polyvinylpyrrolidone and N,N-dimethylacetamide solution were mixed in a round-bottomed flask at a mass ratio of 16:8:76, and heated at 60°C Under stirring for 8h, stand overnight for degassing. Then pour the above-mentioned casting solution on a glass plate, use a 200 μm scraper to shape it, and quickly immerse it in a constant temperature coagulation bath at 25°C to form a film, and soak the obtained polysulfone membrane in deionized water. PVDF membrane is denoted as M PVDF . Wherein, the N,N-dimethylacetamide solution is a pure solution with a mass concentration ≥ 99%.

[0124] (3) Preparation of GA-modified polymer film: prepare a buff...

Embodiment 3

[0126] The preparation of embodiment 3 multilayer GA / MXene modified polymer film

[0127] (1)Na + The preparation method of intercalation MXene, the synthesis of sulfanilic acid diazonium salt and the sulfonation modification of MXene are the same as in Example 1.

[0128] (2) Preparation of polymer membrane: Put polyethersulfone powder, porogen polyethylene glycol (molecular weight 10000) and N,N-dimethylacetamide solution in a round bottom according to the mass ratio of 14:10:76 Mix in the flask, stir at 60°C for 8h, and let stand overnight for degassing. Then pour the above-mentioned casting solution on a glass plate, use a 200 μm scraper to scrape it into shape, quickly immerse it in a constant temperature coagulation bath at 25°C to form a film, and soak the obtained polyethersulfone membrane in deionized water. The PVDF membrane is denoted as M PVDF .

[0129] (3) Preparation of GA-modified polymer film: prepare a final concentration of 2g / L Tris buffer solution, use...

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Abstract

The invention discloses a modified polymer film as well as a preparation method and application thereof, and particularly relates to the field of modified polymer films. The preparation method comprises the following steps: dropwise adding a sulfanilic acid diazonium salt solution into Na<+> intercalated MXene, and after reaction, centrifuging, filtering, washing, ultrasonically treating and freeze-drying to obtain sulfonated MXene powder; immersing a polymer film in a GA / polyethyleneimine (PEI) mixed solution containing trihydroxymethyl aminomethane and metal salt, and reacting to obtain a GAcoating modified polymer film; and depositing the sulfonated MXene powder on the GA coating modified polymer film, and repeating the operations to obtain the single-layer or multi-layer GA / MXene modified polymer film. According to the invention, two methods, namely vacuum assisted suction filtration and layer-by-layer self-assembling, are combined, and the method has the characteristics of uniform film coating, controllable film thickness, better stability, low energy consumption and easiness in operation. In addition, the prepared modified polymer film has the functions of efficiently removing medium and small molecular toxins and having good oxidation resistance and protein adsorption resistance.

Description

technical field [0001] The invention relates to the field of modified polymer films, in particular to a modified polymer film and its preparation method and application. Background technique [0002] Hemodialysis is currently the main means of renal replacement therapy, and the removal efficiency of medium and small molecular toxins of hemodialysis membranes and the blood compatibility of membrane materials are the key issues in current research and development, which determine the clinical application of hemodialysis. the therapeutic effect. With the development and evolution of hemodialysis membranes in recent decades, the removal efficiency of medium and small molecule toxins has gradually been improved, but it is still the direction that researchers are committed to to improve the dialysis efficiency as much as possible. Due to the incompatibility of biofilms when dialysis membranes come into contact with blood, oxidative stress is a complication that can be easily indu...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02B01D69/12B01D71/02B01D71/34B01D71/68C08J9/42C08J9/40C08L27/16C08L81/06
CPCB01D67/0079B01D69/02B01D69/12B01D71/02B01D71/34B01D71/68B01D2325/14B01D2325/36C08J9/40C08J9/42C08J2327/16C08J2381/06C09J2479/02
Inventor 陈莉张迪何洋张永健李玮阳
Owner TIANJIN POLYTECHNIC UNIV
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