Hybrid membrane capable of degrading organic chloride and preparation method of hybrid membrane

An organic chloride, hybrid membrane technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of poor reusability, low reactivity, and operating costs. large and other problems, to achieve the effect of good regeneration, low operating cost and large processing capacity

Inactive Publication Date: 2014-03-05
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of low reactivity, poor reusability and high operating cost of existing nano-iron degraded organic chlorides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a) Preparation of polyacrylic acid microgel: AA8g, crosslinking agent MBAA0.1g, initiator K 2 S 2 o 4Dissolve 0.2g in 100mL of absolute ethanol, under the condition of nitrogen protection, react at a constant temperature of 80°C for 8h to carry out free radical polymerization to obtain PAA microgel;

[0025] b) Preparation of casting solution: the PAA microgel prepared in step a) is mixed with PVDF powder in a ratio of 5%, 10%, 15%, 20%, 30%, and 40% by PAA microgel mass fraction , and then dispersed in DMF, stirred at 60° C., left to defoam under vacuum for 2 hours, to obtain a transparent and uniform casting solution with a mass concentration of 15 wt %;

[0026] c) Preparation of PVDF flat base film: Pour the casting solution obtained in step b) onto a clean and flat glass plate, scrape it evenly with a glass rod to form a liquid film, then immerse the glass plate in distilled water to solidify into a flat film , Soak in distilled water for 12h, remove the residua...

Embodiment 2

[0029] a) with embodiment 1

[0030] b) Preparation of casting solution: the PAA microgel prepared in step a) is mixed with PVDF powder in a ratio of 5%, 10%, 15%, 20%, 30%, and 40% by PAA microgel mass fraction , and then dispersed in DMF, stirred at 60° C., left to defoam under vacuum for 2 hours, to obtain a transparent and uniform casting solution with a mass concentration of 20 wt %;

[0031] c) with embodiment 1

[0032] d) with embodiment 1

Embodiment 3

[0034] a) with embodiment 1

[0035] b) Preparation of casting solution The PAA microgel prepared in step a) is mixed with PVDF powder according to the PAA microgel mass fraction of 5%, 10%, 15%, 20%, 30%, and 40%, Then disperse in DMF, stir at 60°C, and leave to defoam under vacuum for 2 hours to obtain a transparent and uniform casting solution with a mass concentration of 25% by weight;

[0036] c) with embodiment 1

[0037] d) with embodiment 1

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PUM

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Abstract

The invention relates to a hybrid membrane capable of degrading organic chloride and a preparation method of the hybrid memrbane, belonging to the scientific and technical field of polymers. The preparation method comprises the steps of dispersing polyvinylidene fluoride powder, polyacrylic acid microgel or microspheres in N,N-dimethylfomamide, and preparing a flat base membrane by adopting a phase inversion method; then soaking the base membrane in an aqueous solution containing FeCl2 to react for a certain period of time, then soaking the base membrane in an aqueous solution containing sodium borohydride to prepare a hybrid membrane containing Fe<0> nanoparticles, and then soaking the hybrid membrane in an anhydrous ethanol solution containing noble metal salt to prepare a hybrid membrane capable of degrading organic chloride and containing iron-noble metal nanoparticles. The hybrid membrane can degrade chlorinated organic compounds including monochloroacetic acid, chlorophenesic acid, trichloroethylene, tetrachlormethane, polychlorinated biphenyl and the like, and has the advantages of high catalytic reaction activity, convenience in operation, good reuse effect and the like. Besides, the hybrid membrane also has the advantages of simple preparation method, low cost, suitability for large-scale production and the like.

Description

technical field [0001] The invention relates to a degradable organic chloride hybrid membrane and a preparation method thereof, belonging to the field of polymer science and technology. The hybrid membrane can be used for the catalytic degradation of organic chlorides in environmental water, and it shows high activity, good stability and excellent reusability in various catalytic chemical reactions. Background technique [0002] There are 25 kinds of organic substances commonly found in water pollution, among which there are ten kinds of organic chlorides (such as trichlorethylene, carbon tetrachloride, etc.). Such substances are highly toxic and difficult to degrade, and if they enter the environmental water, they will cause long-term threats to human beings and their ecological environment. In recent years, the impact of organic chlorides on water quality has attracted great attention from scientists, and its degradation technology has also been extensively studied at hom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D69/02B01D67/00B01J31/28C02F1/44C02F1/70C02F101/36
Inventor 陈熙何洋赵博武陈莉付维贵冯霞杨青盛慧颖
Owner TIANJIN POLYTECHNIC UNIV
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