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Preparation method of modified polymer film material for effectively removing trace heavy metal ions in water body

A technology of heavy metal ions and polymer membranes, applied in water pollutants, chemical instruments and methods, membrane technology, etc. Poor performance and other problems, to achieve the effect of easy industrial continuous processing, flexible design and long service life

Active Publication Date: 2013-07-24
NINGBO SHUIYI FILM TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods are to use polymers containing functional groups to make membranes by blending, and use the functional groups attached to the membrane skeleton to adsorb heavy metal ions to achieve the purpose of removing them. Although the effect is good, the use of co- Mixed method of film production, the content of hydrophilic polymer should not be too high, otherwise the mechanical properties of the film will be adversely affected, thus limiting its application
CN1535204A discloses a method for preparing a polymer membrane modified by EDTA ligands. The method is to use a modifier to modify the surface of the membrane so as to make it functional. Although it has a good effect, the surface of the membrane is first adsorbed by a layer Hydrophilic polymer layer, and then grafted with EDTA ligand, the surface hydrophilic polymer layer is easy to fall off, which affects its use effect

Method used

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  • Preparation method of modified polymer film material for effectively removing trace heavy metal ions in water body
  • Preparation method of modified polymer film material for effectively removing trace heavy metal ions in water body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] combine figure 1 , the continuous treatment process of the polymer film with atmospheric pressure dielectric barrier discharge plasma is as follows:

[0039] The polypropylene film 1 to be treated is passed between two discharge electrodes 4 of the plasma device, and then wound on an automatic winder 5 . The automatic winder 5 can wind the processed polypropylene film online, and adjust the line speed of the polypropylene film by adjusting the rotation speed of the winding shaft.

[0040] Adjust the distance between the two discharge electrodes 4 to be 1.5 centimeters, first pass into the mixed gas from the air guide tube 3, the mixed gas is argon and oxygen with a volume ratio of 99:1, and adjust the intake speed to be 4 liters / minute; then open Power supply, close the switch of the plasma generator 2, adjust the plasma discharge power to 120 watts, and the discharge frequency to 10 kHz to generate uniform plasma. When the polypropylene film passes between the plasma...

Embodiment 2

[0043] The polypropylene film is placed between the two discharge electrodes of the dielectric barrier discharge, and argon gas is introduced to carry out the normal pressure dielectric barrier discharge plasma treatment. The normal pressure dielectric barrier discharge plasma treatment condition is: the distance between the discharge electrodes is 2 centimeters; a mixture of argon and oxygen with a volume ratio of 99.5:0.5 is introduced, and the intake velocity is 10 liters / minute; the discharge power of the plasma is 100 watts, and the discharge frequency is 10 kilohertz, and the wiring of the polypropylene film The speed is 15 m / min, and the plasma treatment time is 40 seconds; diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide is dissolved in n-heptane to prepare an initiator solution with a concentration of 20mmol / L , dissolve rosin resin acid in water to prepare a monomer solution with a concentration of 40 g / L, use potassium dihydrogen phosphate and sodium hydroxide to pr...

Embodiment 3

[0045] The polystyrene film is placed between the two discharge electrodes of the dielectric barrier discharge, and helium gas is introduced to carry out the dielectric barrier discharge plasma treatment at normal pressure. The plasma treatment conditions of the dielectric barrier discharge at normal pressure are: the distance between the discharge electrodes is 3 cm; a mixed gas of helium and oxygen with a volume ratio of 97:3 is introduced, and the intake velocity is 6 liters / minute; the discharge power of the plasma is 50 watts, and the discharge frequency is 10 kHz, and the polystyrene film The line speed is 3.3 m / min, and the plasma treatment time is 180 seconds; the initiator solution that the benzoin dimethyl ether is dissolved in n-heptane configuration concentration is 30mmol / L, and the methacrylic acid is dissolved in water configuration concentration is 60g / L L monomer solution, use potassium dihydrogen phosphate and sodium hydroxide to prepare a buffer solution with...

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Abstract

The invention discloses a preparation method of a modified polymer film material for effectively removing trace heavy metal ions in a water body, which comprises the following steps: 1) carrying out plasma treatment on a polymer film; 2) respectively preparing an initiator solution, a monomer solution, a buffer solution, an activating solution and a polyethylene polyamine water solution; 3) immerging the polymer film in the initiator solution, and carrying out surface activation by ultraviolet irradiation; 4) putting the polymer film into the monomer solution to carry out grafting reaction under ultraviolet irradiation; 5) activating the polymer film in the activating solution; and 6) putting the activated film into a polyethylene polyamine water solution to carry out coupling reaction, thereby preparing the modified film material capable of removing trace heavy metal ions in a water body. In the polymer film modifying process, carboxyl and amino groups are introduced to carry out hydrophilization and endow the modified film with complexing capacity, thereby removing the trace heavy metal ions. The invention has the advantages of simple technique, favorable treatment effect, wide application range, low cost, high unit mass adsorption capacity, time saving, high efficiency and energy saving.

Description

technical field [0001] The invention relates to a preparation method of a polymer membrane material, in particular to a preparation method of a modified polymer membrane material for effectively removing trace heavy metal ions in water bodies. technical background [0002] Heavy metal ions widely exist in nature and are important raw materials in industry. However, due to the rapid development of industry and the excessive exploitation and use of heavy metals, a large amount of heavy metals enter the atmosphere, water, and soil to cause pollution, which seriously damages people's health. Among them, heavy metal pollution in water has become one of the most serious environmental problems in the world today. As we all know, my country is a water-poor area, coupled with pollution and other reasons, making the originally limited water resources more precious. It is particularly important for the treatment of polluted water, especially the removal of heavy metal ions in water. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/18C08J7/12C08L23/12C08L25/06C08L33/20C08L27/06C08L79/08C08L81/06C08L27/16C08L27/18B01D71/78B01D67/00B01J20/26C02F1/44C02F1/28C02F101/20
Inventor 黄小军杜筱棠徐志康陈骏沈立强
Owner NINGBO SHUIYI FILM TECH DEV CO LTD
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