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A kind of polymer film and its preparation method and application

A technology of polymer film and polyvinylidene fluoride film is applied in the field of material science and film to achieve the effect of improving recovery rate, reducing pollution and reducing secondary damage

Active Publication Date: 2021-10-01
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there have been no reports on the modification of polyvinylidene fluoride membranes using poly N, N-dimethyl (acrylamide propyl) aminopropanesulfonic acid. Therefore, the development of a poly N, N-dimethyl (Acrylamidopropyl) aminopropanesulfonic acid modified polyvinylidene fluoride membrane is of great interest

Method used

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  • A kind of polymer film and its preparation method and application
  • A kind of polymer film and its preparation method and application
  • A kind of polymer film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] This embodiment provides a polymer film, the polymer film is based on a polyvinylidene fluoride film, and one side of the polyvinylidene fluoride film is grafted with poly N,N-dimethyl (acrylamide Base) aminopropanesulfonic acid, its preparation method comprises the following steps:

[0071] (1) Mix polyvinylidene fluoride, PVP K30, PEG400, KH550 and N,N-dimethylacetamide, stir and dissolve at 80°C for 12 hours, then stand at 50°C for defoaming for 12 hours to obtain a casting solution . Coat the casting solution on the glass substrate at room temperature, and after standing for 10 seconds, separate it in a coagulation bath with a concentration of 30% solvent at 35°C, wash it with deionized water, and obtain a film coated on the glass substrate. polyvinylidene fluoride base film (the pore diameter of the polyvinylidene fluoride film is 10-50nm); polyvinylidene fluoride, PVPK30, PEG400, KH550 and N,N-dimethylacetamide in the casting film liquid The weight percentages i...

Embodiment 2

[0078] This embodiment provides a polymer film, the polymer film is based on a polyvinylidene fluoride film, and one side of the polyvinylidene fluoride film is grafted with poly N,N-dimethyl (acrylamide base) aminopropanesulfonic acid, the difference between its preparation method and embodiment 1 is only that the N of step (3), the N-dimethyl (acrylamidopropyl) aminopropanesulfonic acid concentration is 60g / L, and other steps are all consistent , to obtain the polymer film.

[0079] Using the same method as in Example 1, the grafting ratio of poly N, N-dimethyl (acrylamide propyl) aminopropanesulfonic acid on one side of the polyvinylidene fluoride film in the resulting film was 6.6%, n is 9471 and m is 708.

Embodiment 3

[0081] This embodiment provides a polymer film, the polymer film is based on a polyvinylidene fluoride film, and one side of the polyvinylidene fluoride film is grafted with poly N,N-dimethyl (acrylamide Base) aminopropanesulfonic acid, the difference between its preparation method and Example 1 is only that the N, N-dimethyl (acrylamide propyl) aminopropanesulfonic acid concentration of step (3) is 100g / L, and other steps are all Consistently, the polymer film was obtained.

[0082] Using the same method as in Example 1, the grafting rate of poly-N, N-dimethyl (acrylamide propyl) aminopropanesulfonic acid on one side of the polyvinylidene fluoride film in the resulting film was 7.3%, n is 9471 and m is 869.

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Abstract

The invention provides a temperature-sensitive easy-to-clean polymer film. The polymer film uses a polyvinylidene fluoride film as a base film, and a temperature-sensitive material polyN is grafted on one side of the polyvinylidene fluoride film. N-dimethyl (acrylamide propyl) aminopropanesulfonic acid; the preparation method of the film is to make the polyvinylidene fluoride base film covering the substrate and N, N-dimethyl ( Acrylamidopropyl) aminopropanesulfonic acid is polymerized, so that one side of the polyvinylidene fluoride film is grafted with poly N, N-dimethyl (acrylamidopropyl) aminopropanesulfonic acid, and then the substrate is removed to obtain the film. The membrane has high backwashing efficiency and reuse rate, and can form a firm and stable hydration layer with water molecules, which can reduce protein pollution on the membrane surface.

Description

technical field [0001] The invention belongs to the field of material science and membrane technology, relates to a polymer film and its preparation method and application, in particular to a temperature-sensitive easy-to-clean polymer film and its preparation method and application. Background technique [0002] Membrane separation technology has been more and more widely used in food, medicine, biology and water treatment due to its functions of separation, purification, concentration and refining. Compared with traditional processes, it has the advantages of simple operation, safe working environment and energy saving. . The separation process is a physical process and does not involve any chemical changes. Under the action of the driving force, the permeate first dissolves into the upstream side of the membrane. Due to the selectivity of the membrane, small molecules diffuse to the downstream side of the membrane, and large molecules are intercepted. Realize the separat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/34B01D69/02B01D67/00B01D65/02
CPCB01D65/02B01D67/0002B01D69/02B01D71/34B01D2325/14B01D2325/16B01D2325/36
Inventor 李义涛张魁程堂剑张凌飞肖文武
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD