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Preparation method of anthraquinone functionalized polyvinylidene fluoride ultrafiltration membrane

A polyvinylidene fluoride and functional technology, which is applied in chemical instruments and methods, ultrafiltration, membranes, etc., can solve problems such as secondary pollution of water bodies, shedding and loss of quinones, and achieve the effect of promoting degradation

Inactive Publication Date: 2016-06-08
厦门凯茂水处理科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention immobilizes redox mediators on polyvinylidene fluoride by means of chemical synthesis and chemical modification, which solves the problem that the quinones appearing in the existing physical immobilization methods are easy to fall off from the carrier and cause secondary pollution of water bodies and other issues; the prepared anthraquinone functionalized polyvinylidene fluoride ultrafiltration membrane has a good application prospect in the field of nitrogenous sewage treatment

Method used

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  • Preparation method of anthraquinone functionalized polyvinylidene fluoride ultrafiltration membrane
  • Preparation method of anthraquinone functionalized polyvinylidene fluoride ultrafiltration membrane
  • Preparation method of anthraquinone functionalized polyvinylidene fluoride ultrafiltration membrane

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Embodiment 1

[0035] A preparation method of anthraquinone functionalized polyvinylidene fluoride ultrafiltration membrane, comprising the following steps:

[0036] (1) Synthesis of 2-(1-hydroxy-3-butene)-1,4,5,8-tetramethoxynaphthalene:

[0037] ①Synthesis of 1,4,5,8-tetramethoxynaphthalene: Add naphthalene, catalytic amount of tetrabutylammonium bromide, and tetrahydrofuran into a round-bottomed flask, stir until dissolved, then add aqueous sodium dithionite and disulfite Methyl ester solution, stir until the solution is uniform; move the round-bottomed flask to an ice-water bath, react for 1 h, slowly add NaOH aqueous solution dropwise, remove the ice-water bath after the dropwise addition, react at room temperature for 30 min, stir at a constant speed for 18 h until the reaction is complete, The reaction solution was extracted with ethyl acetate, washed with saturated brine, dried over anhydrous magnesium sulfate, filtered, recovered ethyl acetate under reduced pressure, and separated b...

Embodiment 2

[0048] A preparation method of anthraquinone functionalized polyvinylidene fluoride ultrafiltration membrane, comprising the following steps:

[0049] (1) Synthesis of 2-(1-hydroxy-3-butene)-1,4,5,8-tetramethoxynaphthalene:

[0050] ①Synthesis of 1,4,5,8-tetramethoxynaphthalene: Add naphthalene, catalytic amount of tetrabutylammonium bromide, and tetrahydrofuran into a round-bottomed flask, stir until dissolved, then add aqueous sodium dithionite and disulfite Methyl ester solution, stir until the solution is uniform; move the round-bottomed flask to an ice-water bath, react for 1 h, slowly add NaOH aqueous solution dropwise, remove the ice-water bath after the dropwise addition, react at room temperature for 30 min, stir at a constant speed for 18 h until the reaction is complete, The reaction solution was extracted with ethyl acetate, washed with saturated brine, dried over anhydrous magnesium sulfate, filtered, recovered ethyl acetate under reduced pressure, and separated b...

Embodiment 3

[0060] A preparation method of anthraquinone functionalized polyvinylidene fluoride ultrafiltration membrane, comprising the following steps:

[0061] (1) Synthesis of 2-(1-hydroxy-3-butene)-1,4,5,8-tetramethoxynaphthalene:

[0062]①Synthesis of 1,4,5,8-tetramethoxynaphthalene: Add naphthalene, catalytic amount of tetrabutylammonium bromide, and tetrahydrofuran into a round-bottomed flask, stir until dissolved, then add aqueous sodium dithionite and disulfite Methyl ester solution, stir until the solution is uniform; move the round-bottomed flask to an ice-water bath, react for 1 h, slowly add NaOH aqueous solution dropwise, remove the ice-water bath after the dropwise addition, react at room temperature for 30 min, stir at a constant speed for 18 h until the reaction is complete, The reaction solution was extracted with ethyl acetate, washed with saturated brine, dried over anhydrous magnesium sulfate, filtered, recovered ethyl acetate under reduced pressure, and separated by...

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Abstract

The invention belongs to the field of preparation of polyvinylidene fluoride ultrafiltration membranes and in particular relates to a preparation method of an anthraquinone functionalized polyvinylidene fluoride ultrafiltration membrane. The preparation method specifically comprises the following steps: (1) synthesizing 2-(1-hydroxy-3-butene)-1,4,5,8-tetramethyl naphthalene; (2) synthesizing a polyvinylidene fluoride-aromatic ethers copolymer: selecting polyvinylidene fluoride as an initiator, the 2-(1-hydroxy-3-butene)-1,4,5,8-tetramethyl naphthalene as a monomer, N,N-dimethyl formamide as a solvent and cuprous chloride / Me6TREN as a catalyst system, and synthesizing the polyvinylidene fluoride-aromatic ethers copolymer through an atom free radical polymerization method; (3) reducing the polyvinylidene fluoride-aromatic ethers copolymer into quinone by using a demethylation oxidization method; and (4) preparing the polymer in the step (3) and the N,N-dimethyl formamide into a film casting solution and scraping to form the membrane. According to the preparation method provided by the invention, anthraquinone molecules fixed on the polyvinylidene fluoride membrane are firm and do not fall off.

Description

technical field [0001] The invention belongs to the field of preparation of polyvinylidene fluoride ultrafiltration membranes, and in particular relates to a preparation method of anthraquinone functionalized polyvinylidene fluoride ultrafiltration membranes. Background technique [0002] Polyvinylidene fluoride polymer materials have the advantages of high mechanical strength, good chemical stability, resistance to ultraviolet radiation, and are not corroded by acids, alkalis, strong oxidants and halogens at room temperature. The field of environmental engineering is widely used. However, the surface hydrophobicity of polyvinylidene fluoride is strong, and the surface energy is relatively low, which will affect the life of the membrane. In order to further optimize the performance of polyvinylidene fluoride membranes, researchers conducted a series of modification studies. The Chinese patent application with application number 2010102559483 discloses a preparation method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D71/34B01D61/14C02F1/44C08F259/08C08F212/02C08F8/00
CPCB01D61/145B01D69/125B01D71/34B01D2323/36B01D2323/40C02F1/444C08F8/00C08F259/08C08J5/18C08J2351/00C08F212/02B01D67/0011B01D69/02B01D71/80C02F2101/16C08F2438/01C08J2327/16C08F212/22C08F114/22C08F214/22B01D67/0006C08F12/22C08J7/12
Inventor 严滨王玉平叶茜
Owner 厦门凯茂水处理科技有限公司
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