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Fast and efficient boron removal hollow fiber composite membrane and preparation method thereof

A fiber composite and hollow technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as polymer compatibility bottlenecks, and achieve the effect of simple method, easy cleaning, and efficient boron removal.

Active Publication Date: 2017-02-22
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some researchers try to synthesize polymers with multi-hydroxyl mechanism and blend them with PSF or PVDF to form membranes for boron removal. However, the compatibility between polymers often becomes a bottleneck restricting the development of experiments.

Method used

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  • Fast and efficient boron removal hollow fiber composite membrane and preparation method thereof
  • Fast and efficient boron removal hollow fiber composite membrane and preparation method thereof
  • Fast and efficient boron removal hollow fiber composite membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 of the present invention: the preparation method of fast, high-efficiency boron removal hollow fiber composite membrane comprises the following steps:

[0018] 1) After cleaning the polymer porous membrane, seal both ends of the membrane;

[0019] 2) Take 1.5g of dopamine hydrochloride and 3.5g of polyethyleneimine with a molecular weight of 10,000, add them to 100 mL of Tris buffer with a concentration of 10mM, adjust the pH of the solution to 8.5, and obtain a dopamine / polyethyleneimine Tris buffer solution ;

[0020] 3) Immerse the polymer porous membrane cleaned in step 1) into the dopamine / polyethyleneimine Tris buffer solution obtained in step 2), take it out after magnetic stirring at 40°C for 10 h, wash with ethanol and deionized water (Share ethanol and deionized water?) (clean with deionized water first and then ethanol) to wash away the residual dopamine and polyethyleneimine, and prepare a DA / PEI modified hollow fiber composite membrane;

[00...

Embodiment 2

[0022] Embodiment 2 of the present invention: the preparation method of fast, high-efficiency boron removal hollow fiber composite membrane comprises the following steps:

[0023] 1) After cleaning the polymer porous membrane, seal both ends of the membrane;

[0024] 2) Take 1 g of dopamine hydrochloride and 4 g of polyethyleneimine with a molecular weight of 7000, add them to 100 mL of Tris buffer solution with a concentration of 10 mM, adjust the pH of the solution to 9, and obtain a dopamine / polyethyleneimine Tris buffer solution;

[0025] 3) Immerse the polymer porous membrane cleaned in step 1) into the dopamine / polyethyleneimine Tris buffer solution obtained in step 2), take it out after magnetic stirring at 30°C for 14 h, wash with ethanol and deionized water (Share ethanol and deionized water?) (clean with deionized water first and then ethanol) to wash away the residual dopamine and polyethyleneimine, and prepare a DA / PEI modified hollow fiber composite membrane;

[...

Embodiment 3

[0027] Embodiment 3 of the present invention: the preparation method of fast, high-efficiency boron removal hollow fiber composite membrane comprises the following steps:

[0028] 1) After cleaning the polymer porous membrane, seal both ends of the membrane;

[0029] 2) Take 3 g of dopamine hydrochloride and 2 g of polyethyleneimine with a molecular weight of 600, add them to 100 mL of Tris buffer solution with a concentration of 10 mM, adjust the pH of the solution to 8, and obtain a dopamine / polyethyleneimine Tris buffer solution;

[0030] 3) Immerse the polymer porous membrane cleaned in step 1) into the dopamine / polyethyleneimine Tris buffer solution obtained in step 2), take it out after magnetic stirring at 25°C for 4 h, wash with ethanol and deionized water (Share ethanol and deionized water?) (clean with deionized water first and then ethanol) to wash away the residual dopamine and polyethyleneimine, and prepare a DA / PEI modified hollow fiber composite membrane;

[00...

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Abstract

The invention discloses a fast and efficient boron removal hollow fiber composite membrane and a preparation method thereof. In the invention, DA / PEI is applied to the surface of a hollow fiber membrane by a one-step process, and a polyhydroxyl composite membrane is prepared through a ring-opening reaction with glycidol through the polyamino at the branch end. The method disclosed by the invention is simple and easy to operate while the cost is low; meanwhile, with a relatively large contact area relative to a flat sheet membrane, the hollow fiber membrane is easy to clean and has relatively good application prospect in industrial boron removal; and the prepared hollow fiber composite membrane can fast and efficiently realize a boron removal effect and has a good development prospect in a seawater desalination process targeted at drinking water. Moreover, a hollow fiber composite membrane with high throughput and high pollution resistance can be prepared by selecting polyethyleneimine different in molecular weight and can be widely applied to the industrial fields such as oil-water separation and protein and drug purification.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a fast and efficient deboroning hollow fiber composite membrane and a preparation method thereof. Background technique [0002] With the development of industry and the rapid increase of population, problems such as "three wastes" pollution have intensified, causing a crisis of shortage of fresh water resources. Boron is one of the trace elements necessary for animals and plants. However, when the boron content is too high, it will have adverse effects on humans, animals and plants, and boron poisoning will occur, and the difference between boron deficiency and boron poisoning is very small. For example, for plants, when the boron content is too high, it will cause the leaves to turn yellow and wither, which will affect the photosynthesis of plants; for humans, excessive boron intake can cause acute poisoning, such as nausea, vomiting, diarrhea, and impairment of kidne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/08B01D67/00
CPCB01D67/0002B01D69/08
Inventor 靳进波杜西兰张凯舟杨敬葵
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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