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Preparation method and application of polymer-metal composite separation membrane

A metal composite and polymer technology, applied in semipermeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problems of large energy consumption and time cost, high material cost and time cost, and limited temperature adjustment range, etc., to achieve Realize large-scale industrial application, realize the effect of sensitivity and no energy consumption

Active Publication Date: 2018-10-12
HUZHOU SENNUO FLUORINE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, a large amount of chemical reagents are required to adjust the change of pH conditions, and the material cost and time cost are high
And the pH range is limited, which will damage the stability of the material
Changes in temperature conditions require a lot of energy consumption and time costs, and the temperature adjustment range is limited
However, there are no published reports of membranes that are sensitive to electric fields

Method used

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  • Preparation method and application of polymer-metal composite separation membrane
  • Preparation method and application of polymer-metal composite separation membrane
  • Preparation method and application of polymer-metal composite separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Development of PVDF-Ni (polyvinylidene fluoride-nickel) composite separation membrane

[0031] Add 300 ml of deionized water to a clean beaker, then add 0.06 mol of dopamine to the deionized water, ultrasonicate and stir for 30 minutes, then put a clean polyvinylidene fluoride (PVDF) membrane into the beaker. Then, put it into a shaking incubator and shake it at a constant temperature for 24 hours, so as to obtain a dopamine-coated PVDF membrane. The function of dopamine is to adsorb enough silver ions in the next experiment.

[0032] Add 0.16987 g of silver nitrate into a beaker containing 100 ml of deionized water, and stir ultrasonically for 10 minutes to obtain a silver ion solution. The PVDF membrane coated with dopamine in the previous step was immersed in the silver nitrate solution for 5 minutes to ensure that enough silver ions were adsorbed. The membrane was then removed, and the surface of the membrane was rinsed with deionized water to remove exce...

Embodiment 2

[0038] The development of embodiment 2 PP-Cu (polypropylene-copper) composite separation membrane

[0039]Add 500 ml of deionized water to a clean beaker, then add 0.1 mol dopamine to the deionized water, ultrasonicate and stir for 30 minutes, then put a clean polypropylene (PP) membrane into the beaker. Then, put it into a shaking incubator and shake it at a constant temperature for 24 hours, so as to obtain a dopamine-coated PP film. The function of dopamine is to adsorb enough silver ions in the next experiment.

[0040] Add 0.16987 g of silver nitrate into a beaker containing 100 ml of deionized water, and stir ultrasonically for 10 minutes to obtain a silver ion solution. The PP membrane coated with dopamine in the previous step was immersed in the silver nitrate solution for 5 minutes to ensure that enough silver ions were adsorbed. The membrane was then removed, and the surface of the membrane was rinsed with deionized water to remove excess silver ions.

[0041] In a...

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Abstract

The invention relates to a preparation method and an application of a polymer-metal composite separation membrane. The method comprises the following steps: coating a polyvinylidene fluoride microfiltration membrane with dopamine to endow the membrane with the capacity of adsorbing silver ions; then, immersing the membrane adsorbing the silver ions into a reducing solution containing nickel sulfate, and compounding nickel on a polymer separation membrane through reaction to prepare the polymer-metal composite separation membrane. The obtained polymer-metal composite separation membrane realizes sensitivity of Congo red interception rate to an electric field and also has interception stability, and is suitable for selective separation as interception efficiency increases with the enhancement of the electric field, and the separation characteristic of the membrane can be conveniently controlled by changing intensity of the environmental electric field. The method is simple to operate andlow in cost, facilitates industrial application and has great significance in application to printing and dyeing wastewater.

Description

technical field [0001] The invention relates to the technical field of polymer separation membrane surface modification, in particular to a preparation method and application of a polymer-metal composite separation membrane. Background technique [0002] Water scarcity and water pollution have attracted more and more global attention. my country's water resources are particularly scarce, and the problem of water pollution is more prominent. In the past 10 years, my country's water pollution accidents have occurred frequently, with more than 1,700 water pollution accidents every year. Statistics from the Ministry of Environmental Protection show that about 70% of lake water sources are not up to standard, and about 60% of groundwater sources are not up to standard. Water environmental pollution has become a key problem to be solved urgently in our country, and the recycling of sewage is one of the key ways to solve this problem. [0003] As a new interdisciplinary practica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D71/26B01D71/34B01D71/68C02F103/30C02F101/30
CPCB01D67/0079B01D69/02B01D71/26B01D71/34B01D71/68B01D2325/26C02F1/44C02F1/48C02F2101/308C02F2103/30
Inventor 申利国林红军王方园
Owner HUZHOU SENNUO FLUORINE MATERIAL TECH
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