Anthraquinone functionalized polyvinylidene fluoride membrane as well as preparation method and application thereof

A polyvinylidene fluoride film and a polyvinylidene fluoride technology are applied in the field of anthraquinone-functionalized polyvinylidene fluoride film and its preparation, which can solve the problems of unachieved degradation of pollutants and harm to the environment, and achieve good application prospects, Beneficial for promotion and application

Active Publication Date: 2016-04-20
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the membrane products studied above are still based on the principle of physical separation, so that the pollutants can be trans...

Method used

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  • Anthraquinone functionalized polyvinylidene fluoride membrane as well as preparation method and application thereof
  • Anthraquinone functionalized polyvinylidene fluoride membrane as well as preparation method and application thereof
  • Anthraquinone functionalized polyvinylidene fluoride membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Preparation of polyvinylidene fluoride membrane: Dissolve polyvinylidene fluoride and lithium chloride in N,N-dimethylformamide, stir and mix well to make a casting solution, in which N,N-dimethylformamide The dosage of formamide is 83wt%, the dosage of polyvinylidene fluoride is 15wt%, and the dosage of lithium chloride is 2wt%; then after defoaming in a vacuum constant temperature drying oven at 80°C for 48h, put it on a dry and clean glass plate Scrape to form a film, immediately place it in a coagulation bath composed of deionized water to form a film, and store the obtained film in deionized water;

[0028] 2) Membrane pretreatment: Soak the membrane prepared in step 1) in ethanol solution, ultrasonically clean for 30 minutes to remove impurities on the membrane surface, then soak in ultrapure water for 1 hour, and gradually replace the residual ethanol in the membrane. Then the membrane was dried at room temperature to constant weight, and stored with a sealing...

Embodiment 2

[0031] 1) Preparation of polyvinylidene fluoride film: Dissolve polyvinylidene fluoride and ethanol in N,N-dimethylacetamide, stir and mix well to make a casting solution, in which N,N-dimethylacetamide The amount of polyvinylidene fluoride is 84wt%, the amount of polyvinylidene fluoride is 15wt%, and the amount of ethanol is 1wt%. Then, after standing in a vacuum constant temperature drying oven at 80°C for 48 hours, scrape it on a dry and clean glass plate to form a film , immediately placed in a coagulation bath composed of deionized water to form a film, and the obtained film was preserved in deionized water;

[0032]2) Membrane pretreatment: Soak the membrane prepared in step 1) in ethanol solution, ultrasonically clean for 30 minutes to remove impurities on the membrane surface, then soak in ultrapure water for 1 hour, and gradually replace the residual ethanol in the membrane. Then the membrane was dried at room temperature to constant weight, and stored with a sealing ...

Embodiment 3

[0035] 1) Preparation of polyvinylidene fluoride membrane: Dissolve polyvinylidene fluoride and ethanol in dimethyl sulfoxide, stir and mix well to make a casting solution, wherein the amount of dimethyl sulfoxide is 88wt%, polyvinylidene fluoride The dosage of vinyl fluoride is 10wt%, and the dosage of ethanol is 2wt%. Then put it in a vacuum constant temperature drying oven at 80°C for 48 hours to defoam, scrape it on a dry and clean glass plate to form a film, and place it in deionized water immediately. The film is formed in the coagulation bath composed of the water, and the obtained film is preserved in deionized water;

[0036] 2) Membrane pretreatment: Soak the membrane prepared in step 1) in ethanol solution, ultrasonically clean for 30 minutes to remove impurities on the membrane surface, then soak in ultrapure water for 1 hour, and gradually replace the residual ethanol in the membrane. Then the membrane was dried at room temperature to constant weight, and stored w...

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Abstract

The invention discloses an anthraquinone functionalized polyvinylidene fluoride membrane as well as a preparation method and an application thereof. By means of the characteristic that a polyvinylidene fluoride membrane material can enrich free radicals on the surface under high-energy radiation of ultraviolet light and has a grafting reaction easily, an anthraquinone compound is immobilized on polyvinylidene fluoride under the ultraviolet radiation condition through three steps including preparation of the polyvinylidene fluoride membrane, membrane preprocessing and ultraviolet grafting of the polyvinylidene fluoride membrane, so that the problem that an anthraquinone substance falls off and loses easily from a carrier in a conventional immobilizing method is effectively solved. The modified polyvinylidene fluoride membrane can effectively promote degradation of high-concentration nitrogen-containing wastewater, especially degradation of printing and dyeing wastewater, and has good application prospect in the field of sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of material engineering, and in particular relates to an anthraquinone-functionalized polyvinylidene fluoride film and a preparation method and application thereof. Background technique [0002] High-concentration nitrogen-containing domestic sewage, industrial wastewater, and farmland surface water runoff flow into lakes, reservoirs, rivers, and bay waters, causing some algae in the water to overgrow, seriously deteriorating water quality, and disrupting the ecological balance of water bodies. Biological method is the most commonly used method to solve the above water pollution problems, but due to the limitation of electron transfer rate in the biological denitrification process, the effect of biological method is unstable and the treatment efficiency is low. The research found that the redox mediator can accelerate the electron transfer rate in the biological denitrification process and improve the treatm...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J3/28C08F8/34C08F114/22C02F1/72C02F1/70
CPCC02F1/70C02F1/72C08F8/34C08F114/22C08J3/28C08J5/18C08J2327/16
Inventor 严滨王玉平叶茜
Owner XIAMEN UNIV OF TECH
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