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Phosphorus high-throughput adsorption nano-fiber membrane and preparation method thereof

A nanofiber membrane, high-throughput technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc. Hydrolysis resistance and swelling resistance, increase the surface area, and prevent the effect of failure

Active Publication Date: 2019-02-12
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the invention patent with the publication number CN105617990A discloses an adsorbent and its preparation method for simultaneously strengthening the removal of trace amounts of phosphorus and organic matter. The lanthanum-PAN-based carbon nanofiber material prepared by this method can effectively control the removal of phosphorus and organic matter in water. content, but the nanomaterial adopts an oily formula, and a large amount of organic solvent is used in the preparation process, resulting in a cost much higher than other cheap adsorption materials, and it is easy to cause fire and cause accidents under high static voltage conditions, so it is difficult to be practically applied

Method used

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  • Phosphorus high-throughput adsorption nano-fiber membrane and preparation method thereof
  • Phosphorus high-throughput adsorption nano-fiber membrane and preparation method thereof
  • Phosphorus high-throughput adsorption nano-fiber membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for preparing a phosphorus high-flux adsorption nanofiber membrane, comprising the following steps:

[0032] (1) Add PVA and PEI into deionized water at a mass ratio of 3:1, stir at 85°C until completely dissolved to obtain a PVA / PEI solution, and then add La(NO 3 ) 3 ·6H 2 O is added to the PVA / PEI solution to obtain an electrospinning solution; wherein, the total mass of PVA and PEI in the electrospinning solution is the same as La(NO 3 ) 3 The mass ratio of the electrospinning solution is 5:1, and the total content of PVA and PEI in the electrospinning solution is 8wt.%.

[0033] (2) The electrospinning solution obtained in step (1) is electrospun through an electrospinning device to obtain an electrospun membrane (its appearance is as follows: figure 1 Shown); Wherein, the parameter of electrospinning is: spinning voltage is 25kv, and receiving distance is 25cm; The electrospun film that obtains is collected on release paper;

[0034] (3) Place the ele...

Embodiment 2

[0040] A method for preparing a phosphorus high-flux adsorption nanofiber membrane, comprising the following steps:

[0041] (1) Add PVA and PEI into deionized water at a mass ratio of 3:1, stir at 85°C until completely dissolved to obtain a PVA / PEI solution, and then add La(NO 3 ) 3 ·6H 2 O is added to the PVA / PEI solution to obtain an electrospinning solution; wherein, the total mass of PVA and PEI in the electrospinning solution is the same as La(NO 3 ) 3 The mass ratio of the electrospinning solution is 10:1, and the total content of PVA and PEI in the electrospinning solution is 12wt.%.

[0042] (2) The electrospinning solution obtained in step (1) is electrospun through an electrospinning device to obtain an electrospun membrane (its appearance is as follows: figure 1 Shown); Wherein, the parameter of electrospinning is: spinning voltage is 25kv, and receiving distance is 25cm; The electrospun film that obtains is collected on release paper;

[0043] (3) Place the e...

Embodiment 3

[0047] A method for preparing a phosphorus high-flux adsorption nanofiber membrane, comprising the following steps:

[0048] (1) Add PVA and PEI into deionized water at a mass ratio of 3:1, stir at 85°C until completely dissolved to obtain a PVA / PEI solution, and then add La(NO 3 ) 3 ·6H 2 O is added to the PVA / PEI solution to obtain an electrospinning solution; wherein, the total mass of PVA and PEI in the electrospinning solution is the same as La(NO 3 ) 3 The mass ratio of the electrospinning solution is 1:1, and the total content of PVA and PEI in the electrospinning solution is 8wt.%.

[0049] (2) The electrospinning solution obtained in step (1) is electrospun through an electrospinning device to obtain an electrospun membrane (its appearance is as follows: figure 1 Shown); Wherein, the parameter of electrospinning is: spinning voltage is 25kv, and receiving distance is 25cm; The electrospun film that obtains is collected on release paper;

[0050] (3) Place the ele...

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Abstract

The invention discloses a phosphorus high-throughput adsorption nano-fiber membrane and a preparation method thereof, and belongs to the technical field of sewage treatment. The preparation method includes the following steps that PVA and PEI are added into deionized water according to the mass ratio of 3 to1, and a PVA / PEI solution is obtained after the PVA and the PEI are completely dissolved at60-90 DEG C; then La(NO3)3.6H2O is added into the PVA / PEI solution to obtain an electrostatic spinning solution, the mass ratio of the total mass of the PVA and the PEI to the mass of La(NO3)3.6H2O in the electrostatic spinning solution is (1 to 10) to (1 to 1), and the total content of the PVA and the PEI in the electrostatic spinning solution is 8 to 12 wt.%; electrostatic spinning is conductedto obtain an electrospinning membrane; and finally, the obtained electrospinning membrane is placed in a 60 DEG C vacuum drying oven, 0.1-5 wt.% of glutaraldehyde is added for fumigation, then the electrospinning membrane is taken out to be put into lye to be soaked, washed by the deionized water to being neutral and then dried, and thus a target product is obtained. The nano-fiber membrane is prepared through an all-water formula, the preparation steps are simple, the prepared phosphorus high-throughput adsorption nano-fiber membrane can efficiently adsorb phosphorus in a water body with thelow concentration, the large water volume and the high flow rate, and the phosphorus removal rate reaches 100%.

Description

technical field [0001] The invention relates to a phosphorus high-flux adsorption nanofiber membrane and a preparation method thereof, belonging to the technical field of sewage treatment. Background technique [0002] Excessive phosphorus in natural water is the limiting element for water eutrophication and algae overgrowth. Therefore, controlling the concentration of phosphorus in drainage and removing the existing phosphorus in natural water is the key to controlling water eutrophication and algal blooms . However, the existing removal and methods are difficult to solve the problem of high flux (large water volume, low concentration, high flow rate) removal of phosphorus in natural water bodies. [0003] For the removal of phosphorus in water, the adsorption method has the advantages of strong operability and low cost. However, for the adsorption and removal of phosphorus with low concentration, large water volume, and high flow rate, the adsorption recovery material sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/10
CPCB01J20/0207B01J20/261B01J20/28033C02F1/288C02F2101/105
Inventor 李世阳黄翔峰陆丽君刘佳彭开铭
Owner TONGJI UNIV
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