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A kind of preparation method of anti-pollution PVDF hybrid film

A hybrid membrane, anti-pollution technology, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of unstable anti-pollution performance of separation membranes, and achieve the effects of easy industrialization, simple process and low cost.

Active Publication Date: 2020-04-10
QUJING NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For existing ZrO 2 In the nanoparticle modified PVDF membrane process, the nanoparticles are prone to agglomeration, resulting in the instability of the anti-pollution performance of the separation membrane. The present invention uses polyacryloylmorpholine to ZrO 2 Nanoparticles are functionalized so that they can be evenly distributed in the PVDF membrane, and a hybrid PVDF flat separation membrane with stable anti-pollution performance is obtained

Method used

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  • A kind of preparation method of anti-pollution PVDF hybrid film
  • A kind of preparation method of anti-pollution PVDF hybrid film
  • A kind of preparation method of anti-pollution PVDF hybrid film

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) ZrO 2 -Synthesis of g-PACMO: Weigh 5 g ZrO2 Nanoparticles were dispersed in a mixture of 100 mL of absolute ethanol and 100 mL of pure water, stirred ultrasonically for 30 min to make them uniformly dispersed, and 10 mL of silane coupling agent KH570 was added under the protection of nitrogen, and nitrogen gas was continued for 15 min. Stir for 5 h. The product was washed 3-5 times with water, centrifuged and dried in vacuum for 24 h to obtain KH570 modified ZrO 2 Nanoparticles. Weigh 3 g of dry KH570 modified ZrO 2 Nanoparticles were dispersed in 100 mL of absolute ethanol and stirred ultrasonically for 30 min. After blowing nitrogen gas for 10 min, add 0.05 mol of acryloylmorpholine and 0.0005 mol of initiator AIBN, and stir and react at 60 °C for 6 h. The product was washed 3-5 times with water and dried. Obtaining polyacryloylmorpholine (PACMO) modified nanoparticles ZrO 2 -g-PACMO.

[0033] (2) PVDF / ZrO 2 -g-PACMO hybrid membrane (M1) preparation: first...

Embodiment 2

[0036] (1) ZrO 2 - Synthesis of g-PACMO: Same as Example 1.

[0037] (2) PVDF / ZrO 2 - Preparation of g-PACMO hybrid membrane (M2): the main preparation process is the same as in Example 1. The main difference is that ZrO 2 - The amount of g-PACMO nanoparticles added is 2g; the amount of PVDF powder added is 13g; the amount of PEG added is 5g; the amount of DMF added is 80g.

[0038] In this example, the obtained PVDF / ZrO 2 - The initial water contact angle of g-PACMO hybrid membrane M2 is 86 º, and the adsorption capacity of BSA is 73.6 μg / cm 2 .

Embodiment 3

[0040] (1) ZrO 2 - Synthesis of g-PACMO: Same as Example 1.

[0041] (2) PVDF / ZrO 2 - Preparation of g-PACMO hybrid membrane (M3): The main preparation process is the same as in Example 1. The main difference is that ZrO 2 - The amount of g-PACMO nanoparticles added is 3g; the amount of PVDF powder added is 12g; the amount of PEG added is 5g; the amount of DMF added is 80g.

[0042] In this example, the obtained PVDF / ZrO 2 - The initial water contact angle of g-PACMO hybrid membrane M3 is 78º, and the adsorption capacity of BSA is 57.7μg / cm 2 .

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Abstract

The invention discloses an antipollution polyvinylidene fluoride (PVDF) hybrid membrane preparation method which comprises the following steps: (1) synthesizing polyacryloyl morpholine grafting modified zirconium dioxide nano particles (ZrO2-g-PACMO); (2) utilizing the polyacryloyl morpholine grafting modified zirconium dioxide nano particles (ZrO2-g-PACMO) and polyethylene glycol (PEG) as additives to prepare a PVDF / polyacryloyl morpholine grafting modified zirconium dioxide nano particles hybrid separation membrane. A product of the antipollution PVDF hybrid membrane preparation method disclosed by the invention has the characteristics of simple technology, lower cost, easiness in industrial implementation and the like. The PVDF / ZrO2-g-PACMO hybrid membrane prepared through the preparation method disclosed by the invention has hydrophilia superior to a pure PVDF membrane, and protein attached to the surface of the membrane is obviously reduced. The prepared PVDF / ZrO2-g-PACMO hybrid membrane prepared through the preparation method disclosed by the invention can serve as a sewage treatment separation membrane material to be further developed and utilized.

Description

technical field [0001] The invention belongs to the field of membrane technology, and relates to a preparation technology of an organic-inorganic hybrid separation membrane with good anti-pollution performance Background technique [0002] In recent years, with the continuous deepening of membrane separation technology research and the expansion of the application market, membrane separation technology has gradually become an important force in the application of sewage treatment, petrochemical, food industry and other industries. However, in the separation process, the occurrence of membrane fouling is one of the main factors limiting its deep application. Membrane fouling is a general term for a series of factors that increase membrane permeation resistance during the operation of the separation membrane. It refers to the physical, chemical, biochemical or mechanical interaction between particles, colloidal particles, solute macromolecules or hydrocarbons in the feed liqu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D71/34B01D69/02B01D69/14
CPCB01D67/0079B01D69/02B01D69/141B01D71/34B01D2325/00
Inventor 申向
Owner QUJING NORMAL UNIV