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Iron-heavy metal nano particle/PVDF (polyvinylidene fluoride) hybrid membrane and preparation method thereof

A nanoparticle and bimetallic nanotechnology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve poor reusability, low reactivity, and operating costs Large and other problems, to achieve the effect of good reproducibility, low operating cost, and large processing capacity

Inactive Publication Date: 2014-03-19
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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

[0021] a) Preparation of polyacrylic acid microgel: AA8g, crosslinking agent MBAA0.1g, initiator K 2 S 2 o 4 Dissolve 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;

[0022] 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 , then dispersed in DMF, stirred at 60° C., and left to defoam under vacuum for 2 hours to obtain 10 g of a transparent and uniform casting solution with a mass concentration of 15 wt %;

[0023] 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 , soaked in distilled water for 12 hours to r...

Embodiment 2

[0026] a) with embodiment 1

[0027] 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 , then dispersed in DMF, stirred at 60° C., left to defoam under vacuum for 2 hours, to obtain 10 g of a transparent and uniform casting solution with a mass concentration of 20 wt %;

[0028] c) with embodiment 1

[0029] d) with embodiment 1

Embodiment 3

[0031] a) with embodiment 1

[0032] 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 10 g of a transparent and uniform casting solution with a mass concentration of 25 wt %;

[0033] c) with embodiment 1

[0034] d) with embodiment 1

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Abstract

The invention relates to an iron-heavy metal nano particle / PVDF hybrid membrane and a preparation method thereof, which belongs to the field of polymer science and technology. The method comprises the steps of dispersing the PVDF powder and polyacrylic acid (PAA) microgel into N,N- dimethylformamide (DMF), and preparing a PVDF flat base membrane by adopting a phase inversion method; soaking the PVDF base membrane in an aqueous solution containing FeCl2 to react for a given time, then soaking the PVDF base membrane in an aqueous solution containing sodium borohydride to prepare a hybrid membrane containing FeO nano particles, and then soaking the hybrid membrane in an absolute ethyl alcohol aqueous solution containing heavy metal salt to prepare a hybrid membrane containing heavy metal-iron nano particles. The hybrid membrane can be used for degrading chlorinated organic compounds such as monochloroacetic acid, chlorophenesic acid, trichloro ethylene, tetrachlormethane and polychlorinated biphenyl and has high catalytic reaction activity. The preparation method is simple and easy to control, the cost is low, and the method is applicable to the mass production.

Description

technical field [0001] The invention relates to a polymer hybrid film containing iron-noble metal nanoparticles and microgel 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 compounds commonly found in water pollution, of which 10 are organic chlorinated compounds (such as trichlorethylene, etc.). These substances are highly toxic and difficult to degrade. Once they enter the environment, they will pose a long-term threat to humans and their ecological environment. In recent years, the impact of organic chlorinated compounds on water quality has attracted great attention of scientists, and its degradation technology has also been extensively studied at home an...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D69/02B01D67/00B01J31/28C02F1/44C02F1/70C02F101/36
Inventor 陈熙何洋赵博武陈莉冯霞付维贵
Owner TIANJIN POLYTECHNIC UNIV
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