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Nano composite fiber membrane capable of efficiently removing ionic dyes and heavy metal ions in water as well as preparation method and application of nano composite fiber membrane

A nano-composite fiber, heavy metal ion technology, applied in the directions of alkali metal compounds, fiber treatment, water pollutants, etc., can solve the problems of incomplete removal of pollutants, difficult separation, inconvenient operation, etc., and achieve good mechanical properties and recycling capacity. , The activation process is simple and the structure is stable.

Pending Publication Date: 2021-04-09
GUANGZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although a lot of research has been done on the liquid filtration of electrospun fiber membranes in the existing methods, the shortcomings of incomplete removal of pollutants, inconvenient operation, difficult separation, and difficult recovery restrict the further application of electrospun fiber membranes in water treatment.

Method used

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  • Nano composite fiber membrane capable of efficiently removing ionic dyes and heavy metal ions in water as well as preparation method and application of nano composite fiber membrane
  • Nano composite fiber membrane capable of efficiently removing ionic dyes and heavy metal ions in water as well as preparation method and application of nano composite fiber membrane
  • Nano composite fiber membrane capable of efficiently removing ionic dyes and heavy metal ions in water as well as preparation method and application of nano composite fiber membrane

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preparation example Construction

[0035] The present invention constructs a kind of nanofiber composite film with electrospinning fiber and graphene oxide as the building block, and through dopamine modification, it becomes a pair of ionic dyes (such as methylene blue, chrome black T) and heavy metal ions (such as Cu 2+ ) Materials with adsorption function. The preparation method of nanofiber composite film comprises the following steps:

[0036] (1) Preparation of polyacrylonitrile electrospun nanofibers and graphene oxide composite membranes (PAN / GO NFMs): The membrane preparation is divided into electrospinning part and ultrasonic spraying part, which are carried out on both sides of the receiving device at the same time; the PAN (Polyacrylonitrile) was dissolved in a solvent, prepared into a uniform PAN solution, and then prepared into a fibrous film by electrospinning; prepared an ethanol solution of GO, and sprayed it on the fiber prepared by electrospinning by ultrasonic spraying On the membrane: Elec...

Embodiment 1

[0056] (1) Preparation of polyacrylonitrile electrospun nanofiber membrane (PAN NFMs): PAN is dissolved in DMF, stirred evenly, and prepared into a homogeneous solution (concentration 9wt.%), at room temperature and humidity of 45 ± 2% conditions PAN NFMs were prepared by electrospinning under high conditions. The injection speed of PAN solution was 0.5mL / h, the voltage was 14kV, the fiber receiving distance was 12cm, and the receiving device was a metal roller with a rotation speed of 200r / min.

[0057] (2) Preparation of polyacrylonitrile electrospun nanofibers and graphene oxide composite membranes (PAN / GO NFMs): The membrane preparation is divided into electrospinning part and ultrasonic spraying part, which are carried out on both sides of the receiving roller at the same time, such as figure 2 . The technical parameters of the electrospinning part are the same as step (1), the spraying solution is ethanol solution (0.25mg / mL) of GO, the ultrasonic spraying power is 18W,...

Embodiment 2

[0060] (1) Preparation of polyacrylonitrile electrospun nanofiber membrane (PAN NFMs): PAN is dissolved in DMF, stirred evenly, prepared into a homogeneous solution (concentration 10wt.%), at room temperature and humidity 45 ± 2% conditions PAN NFMs were prepared by electrospinning under high temperature conditions. The injection speed of PAN solution was 0.8mL / h, the voltage was 16kV, the fiber receiving distance was 16cm, and the receiving device was a metal roller with a rotation speed of 200r / min.

[0061] (2) Preparation of polyacrylonitrile electrospun nanofibers and graphene oxide composite membranes (PAN / GO NFMs): The membrane preparation is divided into electrospinning part and ultrasonic spraying part, which are carried out on both sides of the receiving roller at the same time, such as figure 2. The technical parameters of the electrospinning part are the same as in step (1), the spraying solution is GO ethanol solution (0.3mg / mL), the ultrasonic spraying power is ...

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Abstract

The invention discloses a nano-composite fiber membrane capable of efficiently removing ionic dyes and heavy metal ions in water as well as a preparation method and application of the nano-composite fiber membrane. The method comprises the following steps: (1) preparing a polyacrylonitrile electrostatic spinning nanofiber and graphene oxide composite membrane, namely preparing an electrostatic spinning part of a PAN solution and an ethanol solution part of ultrasonic spraying GO at the same time on two sides of a receiving device; and (2) polydopamine modification of the polyacrylonitrile electrostatic spinning nanofiber and graphene oxide composite membrane: preparing a dopamine aqueous solution, then immersing the polyacrylonitrile electrostatic spinning nanofiber and graphene oxide composite membrane into the dopamine aqueous solution, stirring for reaction, and then washing and freeze-drying the membrane to obtain the nano composite fiber membrane. The nano composite fiber membrane synthesized by the method has a good filtering effect on ionic dyes and heavy metal ions, is complete and stable in structure and good in mechanical property, and has a good application prospect in industrial wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of ionic dye and heavy metal sewage treatment, and in particular relates to a nanocomposite fiber membrane capable of efficiently removing ionic dye and heavy metal ions in water, a preparation method and application thereof. Background technique [0002] With the rapid development of modern industry, environmental pollution is considered to be one of the most serious crises in the world, in which the water pollution caused by the discharge of sewage containing dangerous chemicals is endangering people's health and the ecological environment. In these polluting ionic dyes and heavy metal ions cause paint, electroplating, textile, cosmetics, metallurgy and other industries, are the most harmful poisons, due to their stable and non-degradable aromatic structure, these pollutants can cause damage to the human body, including liver toxicity, Digestive system and central nervous system damage. In order to remove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D67/00B01D69/12D06M15/37D06M11/74C02F1/28C02F101/20C02F101/22C02F101/30C02F101/38D06M101/28
CPCB01J20/20B01J20/261B01J20/28038B01D69/125B01D69/12B01D67/0079D06M15/37D06M11/74C02F1/283C02F1/285D06M2101/28B01J2220/4806B01J2220/4812C02F2101/20C02F2101/22C02F2101/308C02F2101/38
Inventor 王昊宇牛利韩冬雪韩东方潘国亮
Owner GUANGZHOU UNIVERSITY
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