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Nanocone structure polypyrrole/metal mesh porous filter membrane and preparation method and application thereof

A technology of polypyrrole and nanocones, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the problems of limited bonding strength between separation membrane and substrate, complex preparation process, and low recycling rate

Active Publication Date: 2020-08-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent 200710037333.1 discloses a method for preparing a full-range hydrophobic polypyrrole film: use glass as a substrate, coat a block copolymer film on the surface, and then selectively deposit a thin layer of polypyrrole on the film surface to control the polypyrrole in its oxidation state, In the reduced state, it is hydrophobic and realizes the function of oil-water separation, but the preparation process is complicated, the bonding strength between the separation membrane and the substrate is limited, and the recycling rate is not high
There are still few technologies using polypyrrole to improve filtration membranes to achieve oil-water separation

Method used

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  • Nanocone structure polypyrrole/metal mesh porous filter membrane and preparation method and application thereof
  • Nanocone structure polypyrrole/metal mesh porous filter membrane and preparation method and application thereof
  • Nanocone structure polypyrrole/metal mesh porous filter membrane and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] First, a 3cm×3cm titanium mesh (320 mesh) was super-cleaned with deionized water, 99.7% absolute ethanol and 99.5% acetone for 20 minutes each, and then washed with hydrofluoric acid / nitric acid mixed solution (water:hydrofluoric acid) : The nitric acid volume ratio is 1:1:100) Ultrasonic pickling titanium mesh for 30 minutes, cleaning and drying the pickled titanium mesh, and then sandblasting the titanium mesh with a sandblasting machine, the sandblasting air pressure is 0.4MPa, treatment The time is 2 minutes.

[0040] Then, select the three-electrode mode, the conductive substrate (sandblasted titanium mesh) is the working electrode, the copper sheet is the counter electrode, the silver / silver chloride electrode is the reference electrode, and the concentration of pyrrole in the electrolyte solution is 0.2mol / L , the concentration of hydrochloric acid is 0.25mol / L. The electrochemical reaction was controlled by a constant voltage method, and the reaction potential ...

Embodiment 2

[0048] First, a 3cm×3cm titanium mesh (320 mesh) was super-cleaned with deionized water, 99.7% absolute ethanol and 99.5% acetone for 20 minutes each, and then washed with hydrofluoric acid / nitric acid mixed solution (water:hydrofluoric acid) : The nitric acid volume ratio is 1:1:100) Ultrasonic pickling titanium mesh for 30 minutes, cleaning and drying the pickled titanium mesh, and then sandblasting the titanium mesh with a sandblasting machine, the sandblasting air pressure is 0.4MPa, treatment The time is 2 minutes.

[0049] Then, select the three-electrode mode, the conductive substrate (sandblasted titanium mesh) is the working electrode, the copper sheet is the counter electrode, the silver / silver chloride electrode is the reference electrode, and the concentration of pyrrole in the electrolyte solution is 0.2mol / L , the concentration of hydrochloric acid is 0.25mol / L. The electrochemical reaction was controlled by a constant voltage method, and the reaction potential ...

Embodiment 3

[0056] First, a 3cm×3cm titanium mesh (320 mesh) was super-cleaned with deionized water, 99.7% absolute ethanol and 99.5% acetone for 20 minutes each, and then washed with hydrofluoric acid / nitric acid mixed solution (water:hydrofluoric acid) : The nitric acid volume ratio is 1:1:100) Ultrasonic pickling titanium mesh for 30 minutes, cleaning and drying the pickled titanium mesh, and then sandblasting the titanium mesh with a sandblasting machine, the sandblasting air pressure is 0.4MPa, treatment The time is 2 minutes. The sand selection for sandblasting is shown in Table 3 below.

[0057] Then, the three-electrode mode was selected, the conductive substrate (sandblasted titanium mesh) was used as the working electrode, the copper sheet was used as the counter electrode, the silver / silver chloride electrode was used as the reference electrode, and pyrrole was dissolved in the electrolyte solution. A constant voltage method was used to control the electrochemical reaction. Af...

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Abstract

The invention discloses a nanocone structure polypyrrole / metal mesh porous filter membrane and a preparation method and application thereof. The method comprises the following steps: (1) carrying outsand blasting treatment on the surface of a metal filter screen, and preparing a structure with micro islands and micro gullies on the surface of the filter screen, (2) depositing a smooth polypyrrolefilm layer on the surface of the metal net through an electrochemical method, and (3) electrochemically depositing polypyrrole with a nanocone structure on the surface of the polypyrrole film layer.The functionalized composite filter membrane can realize ultrafast oil-water separation, can separate various types of sewage, has very good mechanical stability and corrosion resistance, and can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of manufacturing functional membranes for sewage treatment, and in particular relates to a polypyrrole / metal mesh porous filter membrane with a nano-cone structure and a preparation method and application thereof. Background technique [0002] In oil extraction and transportation, oil spills are common. Oil spills can cause serious water pollution and threaten the ecological environment. There are many methods for oil pollution treatment in water areas, including oil-absorbing material adsorption method, functional membrane separation method, dispersant degradation method and so on. Among them, the separation method through functional membrane has the advantages of convenience, quickness, low cost, environmental protection and low energy consumption, so it has attracted the attention of many researchers. Superhydrophobic / superhydrophilic materials are widely used as oil-water separation membranes, which ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/62B01D67/00B01D17/02
CPCB01D17/085B01D67/0079B01D71/62
Inventor 于鹏黄怡萱宁成云王珍高刘广宇李玮周蕾范磊张珂嘉冉合迎
Owner SOUTH CHINA UNIV OF TECH
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