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A preparation method of a composite membrane with the function of adsorbing and separating heavy metal ions

A heavy metal ion, composite membrane technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of difficult recovery and recycling, and achieve fast adsorption rate and short production cycle. , the effect of simple operation

Inactive Publication Date: 2017-06-30
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these materials have certain limitations in the actual application process, such as: difficult to recycle

Method used

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  • A preparation method of a composite membrane with the function of adsorbing and separating heavy metal ions
  • A preparation method of a composite membrane with the function of adsorbing and separating heavy metal ions
  • A preparation method of a composite membrane with the function of adsorbing and separating heavy metal ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Dissolve nylon 6 with a mixed solvent of formic acid and acetic acid (mass ratio of formic acid and acetic acid is 1:1), prepare nylon 6 spinning solution with a mass fraction of 17.5wt%, and then adjust the receiving distance to 15cm, voltage 20kV, at room temperature Down electrospinning to produce an electrospun membrane with a thickness of 0.08-0.12 mm;

[0038] (2) Add MBA (N,N-methylenebisacrylamide) (10.175g) and AEPZ (N-aminoethylpiperazine) (8.527g) to 120mL methanol / water mixed solvent (volume of methanol and water ratio of 7:3), polymerized at 50°C for 5 days under constant temperature and condensing reflux conditions, precipitated the resulting product twice in ice acetone, and moved the precipitated polymer into a vacuum drying oven at room temperature, -0.1MPa Dry under vacuum for 12 hours to obtain hyperbranched polyamidoamine, which is then placed in a desiccator for subsequent use.

[0039] (3) Cut the obtained electrospun membrane into a size of 5...

Embodiment 2

[0042](1) Dissolve nylon 6 with a mixed solvent of formic acid and acetic acid (mass ratio of formic acid and acetic acid is 1:1), prepare nylon 6 spinning solution with a mass fraction of 17.5wt%, and then adjust the receiving distance to 15cm, voltage 20kV, at room temperature Down electrospinning to produce an electrospun membrane with a thickness of 0.08-0.12mm;

[0043] (2) Add MBA (N,N-methylenebisacrylamide) (10.175g) and AEPZ (N-aminoethylpiperazine) (8.527g) to 120mL methanol / water mixed solvent (volume of methanol and water ratio of 7:3), polymerized at 50°C for 5 days under constant temperature and condensing reflux conditions, precipitated the resulting product twice in ice acetone, and moved the precipitated polymer into a vacuum drying oven at room temperature, -0.1MPa Dry under vacuum for 12 hours to obtain hyperbranched polyamidoamine, which is then placed in a desiccator for subsequent use.

[0044] (3) Cut the obtained electrospun membrane into a size of 5cm...

Embodiment 3

[0047] (1) Dissolve nylon 6 with a mixed solvent of formic acid and acetic acid (mass ratio of formic acid and acetic acid is 1:1), prepare nylon 6 spinning solution with a mass fraction of 17.5wt%, and then adjust the receiving distance to 15cm, voltage 20kV, at room temperature Down electrospinning to produce an electrospun membrane with a thickness of 0.08-0.12 mm;

[0048] (2) Add MBA (N,N-methylenebisacrylamide) (10.175g) and AEPZ (N-aminoethylpiperazine) (8.527g) to 120mL methanol / water mixed solvent (volume of methanol and water ratio of 7:3), polymerized at 50°C for 5 days under constant temperature and condensing reflux conditions, precipitated the resulting product twice in ice acetone, and moved the precipitated polymer into a vacuum drying oven at room temperature, -0.1MPa Dry under vacuum for 12 hours to obtain hyperbranched polyamidoamine, which is then placed in a desiccator for subsequent use.

[0049] (3) Cut the obtained electrospun membrane into a size of 5...

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Abstract

The invention discloses a method for preparing a composite membrane with the function of absorbing and separating heavy metal ions. Firstly, a nylon 6 nanofiber membrane is prepared by using an electrospinning method; secondly, hyperbranched polyamidoamine is adsorbed to the nylon 6 fiber by physical action. Surface; finally, the hyperbranched polyamidoamine is cross-linked by chemical reaction to form a tubular film, which is firmly attached to the surface of the nylon 6 fiber. The invention fully utilizes the characteristics of large specific surface area and high porosity of the nylon 6 electrospinning membrane and the characteristic of strong adsorption capacity of hyperbranched polyamidoamine to heavy metal ions. The preparation process of the material of the invention is simple, the structure is novel, and the adsorption capacity is strong.

Description

[0001] 1. Technical field [0002] The invention relates to a preparation method of a composite membrane capable of absorbing and separating heavy metal ions, and belongs to the field of sewage purification treatment. [0003] 2. Background technology [0004] With the development of industrial civilization, a large amount of industrial wastewater containing heavy metal ions such as copper, cobalt, chromium, cadmium, lead, mercury, etc. is discharged into the natural environment. Heavy metal ions not only cannot be degraded by organisms but also accumulate in organisms, thus causing various diseases and disorders of body functions. These heavy metal ions seriously endanger the natural environment and human health. [0005] In the past few decades, the removal methods for heavy metal ions mainly include sedimentation method, reverse osmosis method, co-precipitation method, ion exchange method, and adsorption method. Among them, the adsorption method is one of the most effectiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/26D04H1/728C02F1/28C02F101/20
Inventor 杨文魏士明郝文涛
Owner HEFEI UNIV OF TECH
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