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Self-supported attapulgite nanofiber membrane, and preparation method thereof

A technology of nanofiber membrane and attapulgite, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problem of rare attapulgite, achieve the effect of rich raw materials, high mechanical strength, and easy operation

Inactive Publication Date: 2017-02-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Attapulgite as an inorganic membrane material is rarely reported in the literature and published at present.

Method used

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  • Self-supported attapulgite nanofiber membrane, and preparation method thereof
  • Self-supported attapulgite nanofiber membrane, and preparation method thereof
  • Self-supported attapulgite nanofiber membrane, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Disperse attapulgite in aqueous solution at room temperature, ultrasonically disperse, take the upper suspension, enrich to obtain attapulgite colloid, and prepare attapulgite colloid (solid content is 2wt%), and then 10mL of Add polyvinyl alcohol solution (1wt%) into 60 mL of attapulgite colloid at a rate of 0.5 mL / min, and stir for 24 h.

[0028] (2) Concentrate the mixed solution in step 1 in a rotary evaporator, specifically at 50°C for 3 hours and 80°C for 30 minutes to obtain a mixed slurry with a water content of 60%;

[0029] (3) Place the mixed slurry in step 2 in a self-made suction filtration device, and filter under a pressure of 0.1 MPa for 1 hour, and dry the prepared membrane material at 40°C for 24 hours to obtain an attapulgite nanofiber membrane .

[0030] (4) Place the attapulgite nanofiber membrane in step 3 in a vacuum tube furnace, sinter it in a nitrogen atmosphere, raise the temperature from room temperature to 240°C at a rate of 1K / min, kee...

Embodiment 2

[0034] (1) Disperse attapulgite in aqueous solution at room temperature, ultrasonically disperse, take the upper suspension, enrich to obtain attapulgite colloid, and prepare attapulgite colloid (solid content is 2wt%), and then 5mL of Add polyvinyl alcohol solution (1wt%) into 60 mL of attapulgite colloid at a rate of 0.2 mL / min, and stir for 24 h.

[0035] (2) Concentrate the mixed solution in step 1 in a rotary evaporator, specifically at 50°C for 3 hours and 80°C for 30 minutes to obtain a mixed slurry with a water content of 60%;

[0036] (3) Place the mixed slurry in step 2 in a self-made suction filtration device, and filter under a pressure of 0.1 MPa for 1 hour, and dry the prepared membrane material at 40°C for 24 hours to obtain an attapulgite nanofiber membrane .

[0037] (4) Place the attapulgite nanofiber membrane in step 3 in a vacuum tube furnace, sinter it in a nitrogen atmosphere, raise the temperature from room temperature to 240°C at a rate of 1K / min, keep...

Embodiment 3

[0041] (1) Disperse attapulgite in aqueous solution at room temperature, ultrasonically disperse, take the upper suspension, enrich to obtain attapulgite colloid, and prepare attapulgite colloid (solid content is 2wt%), and then 10mL of Add polyethylene glycol solution (1 wt%) into 60 mL of attapulgite colloid at a rate of 0.5 mL / min, and stir for 24 h.

[0042] (2) Concentrate the mixed solution in step 1 in a rotary evaporator, specifically at 50°C for 3 hours and 80°C for 30 minutes to obtain a mixed slurry with a water content of 60%;

[0043] (3) Place the mixed slurry in step 2 in a self-made suction filtration device, and filter under a pressure of 0.1 MPa for 1 hour, and dry the prepared membrane material at 40°C for 24 hours to obtain an attapulgite nanofiber membrane .

[0044] (4) Place the attapulgite nanofiber membrane in step 3 in a vacuum tube furnace, sinter it in a nitrogen atmosphere, raise the temperature from room temperature to 240°C at a rate of 1K / min, ...

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Abstract

The invention relates to a self-supported attapulgite nanofiber membrane, and a preparation method thereof. The self-supported attapulgite nanofiber membrane is a nanofiber membrane with a three-dimensional net structure, and is formed via combination of attapulgite with a water-soluble polymer. The preparation method comprises following steps: attapulgite colloid and a solution of the water-soluble polymer are mixed and concentrated so as to obtain a mixed slurry; the mixed slurry is subjected to suction filtration so as to obtain a membrane; and the membrane is dried, and is subjected to step sintering in an inert atmosphere so as to obtain the finished product. The self-supported attapulgite nanofiber membrane possesses uniformly distributed nano-scaled pores and chemical corrosion resistance, is high in mechanical strength, and excellent in adsorption performance, and can be applied to the field of ultrafiltration.

Description

technical field [0001] The invention belongs to the field of inorganic nanofiber membranes and preparation thereof, in particular to a self-supporting attapulgite nanofiber membrane and a preparation method thereof. Background technique [0002] At present, the methods for treating wastewater include activated carbon adsorption, biological treatment technology, chemical oxidation, reverse osmosis, electrodeposition, ion exchange, evaporation, etc. However, most of these methods and technologies are inefficient or expensive, and there are secondary pollution problems. Compared with the above methods, nanofibrous membrane materials have more advantages and application prospects in wastewater treatment because of their unique nanostructure and nanoeffects, as well as the advantages of easy recycling and regeneration. Compared with traditional membrane materials, nanofiber membranes have extremely high porosity, generally up to 80% or more; the pores in nanofiber membranes are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00B01D69/02
CPCB01D71/02B01D67/0079B01D69/02B01D2325/02B01D2325/24B01D2325/30
Inventor 陈大俊朱业凯兰野
Owner DONGHUA UNIV
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