Functionalized carbon fiber membrane capable of adsorbing and degrading micro-plastics and preparation method of functionalized carbon fiber membrane

A technology of functionalized carbon and fiber membranes, applied in chemical instruments and methods, adsorption water/sewage treatment, membrane technology, etc., can solve the problem of single microplastic removal technology

Active Publication Date: 2020-12-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a functionalized carbon fiber membrane capable of absorbing and degrading microplastics and a preparation method thereof, with the purpose of overcoming the relatively single problem of existing microplastic removal technologies

Method used

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  • Functionalized carbon fiber membrane capable of adsorbing and degrading micro-plastics and preparation method of functionalized carbon fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A functionalized carbon fiber membrane capable of absorbing and degrading microplastics, comprising the steps of:

[0065] (1) Soak a polyacrylonitrile fiber membrane with a diameter of 100nm in water, add hydroxylamine hydrochloride, adjust the pH value to 7 with sodium carbonate, and then heat to react (the temperature is 80°C, and the time is 60min). After the reaction, the fiber membrane Rinse and vacuum dry (temperature is 60 ℃), obtain the polyacrylonitrile fiber film of amidoxime modification; Wherein, the mass ratio of polyacrylonitrile fiber film and water is 1:750; The mass ratio of polyacrylonitrile fiber film and hydroxylamine hydrochloride The ratio is 1:0.03.

[0066] (2) The prepared amidoxime-modified polyacrylonitrile fiber membrane was immersed in a continuous stirring (magnetic stirring speed of 220rpm) containing iron salt (MnCl 2 4H 2 O) in an aqueous solution, then carry out self-assembly reaction (temperature is 180 ℃, time is 30min) in a hydrot...

Embodiment 2

[0084] A functionalized carbon fiber membrane capable of absorbing and degrading microplastics, comprising the steps of:

[0085] (1) Soak a polyacrylonitrile fiber membrane with a diameter of 50nm in water, add hydroxylamine hydrochloride, adjust the pH value to 8 with potassium hydroxide, and then heat to react (the temperature is 30°C, and the time is 180min). After the reaction, the polyacrylonitrile Acrylonitrile fiber membrane washing and vacuum drying (temperature is 70 ℃), obtain the polyacrylonitrile fiber membrane of amidoxime modification; Wherein, the mass ratio of polyacrylonitrile fiber membrane and water is 1:1000; Polyacrylonitrile fiber membrane and The mass ratio of hydroxylamine hydrochloride is 1:0.05.

[0086] (2) Immerse the polyacrylonitrile fiber membrane modified by amidoxime in continuous stirring (the rotating speed of magnetic stirring is 320rpm) containing iron salt (FeCl 3 ·6H 2 O) in an aqueous solution, then carry out a self-assembly reaction ...

Embodiment 3

[0094] A functionalized carbon fiber membrane capable of absorbing and degrading microplastics, comprising the steps of:

[0095] (1) Soak a polyacrylonitrile fiber membrane with a diameter of 500nm in water, add hydroxylamine hydrochloride, adjust the pH value to 9 with sodium hydroxide, and then heat to react (the temperature is 80°C, and the time is 70min). After the reaction, the product Carry out separation, washing and vacuum drying (temperature is 80 ℃), obtain the polyacrylonitrile fiber film of amidoxime modification; Wherein, the mass ratio of polyacrylonitrile fiber film and water is 1:250; The mass ratio of carbonaceous material and hydroxylamine hydrochloride The ratio is 1:0.05.

[0096] (2) Immerse the prepared amidoxime-modified polyacrylonitrile fiber membrane into continuous stirring (the rotating speed of magnetic stirring is 420rpm) containing iron salt (CoCl 2 ·6H 2 (2) in aqueous solution, carry out self-assembly reaction (temperature is 120 ℃, time is ...

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Abstract

The invention relates to a preparation method of a functionalized carbon fiber membrane capable of adsorbing and degrading micro-plastics. The preparation method comprises the following steps: mixinga functionalized carbon fiber membrane and micro-plastics in a mass ratio of 1: 0.01-0.5 wt% of an amidoxime-modified polyacrylonitrile fiber membrane (the content of amidoxime groups is 0.5-15wt%) and more than one of metal salts (MnCl2.4H2O, MnSO4.4H2O, FeCl3.6H2O, Fe(NO3)3.9H2O, CoCl2.6H2O, Co (NO3)2.6 H2O, Co(Ac)2.4H2O, NiCl2.6H2O, Ni(NO3)2.6H2O and Ni(Ac)2.4 H2O) are prepared; the membrane isused as a cathode, a BDD electrode is used as an anode, and the micro-plastic is degraded through an electro-Fenton oxidation method.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic environmental restoration, and relates to a functionalized carbon fiber membrane capable of absorbing and degrading microplastics and a preparation method thereof. Background technique [0002] Microplastics are defined as synthetic polymer particles smaller than 5 microns in diameter. Under normal circumstances, microplastics can be divided into primary microplastics and secondary microplastics according to their sources: primary microplastics include fibers, drugs, cosmetics, and plastic microspheres synthesized as raw materials in industrial synthesis; secondary microplastics are mainly Large pieces of plastic, such as tires, films, plastic containers, etc., are broken in the natural environment due to wind and wave erosion or aging processes caused by ultraviolet light, hydrolysis, pyrolysis, and microorganisms. In recent years, due to the continuous input of plastic waste from diffe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/12B01D71/02B01D71/42B01J20/30B01J20/26B01J20/28B01J23/889B01J35/02C02F1/28C02F1/461
CPCB01D67/0079B01D69/12B01D71/021B01D71/42B01J20/20B01J20/26B01J20/28033B01J23/8892B01J35/023C02F1/283C02F1/285C02F1/4672
Inventor 杨建平陈俊良王华平乌婧
Owner DONGHUA UNIV
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