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Oxidized graphene/silicon dioxide/high-molecular polymer composite nano-filtration membrane preparation method

A high molecular polymer and composite nanofiltration membrane technology, applied in the direction of alkali metal oxides/hydroxides, alkali metal compounds, chemical instruments and methods, etc., can solve the problem of low strength of electrospun fiber membranes, failure to achieve filtration effects, Electrospun membrane lacks economy and other problems, and achieves the effect of low raw material price, convenient operation of process equipment, and favorable industrialization

Inactive Publication Date: 2017-06-09
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing electrospun nano-membrane materials, especially electrospun fiber membranes have low strength, and the preparation of electrospun membranes with high surface density is not economical, so the best filtering effect cannot be achieved when using pure nano-membrane materials as filter materials and poor functionality

Method used

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  • Oxidized graphene/silicon dioxide/high-molecular polymer composite nano-filtration membrane preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The invention discloses a preparation method of graphene oxide / silicon dioxide / polymer composite nanofiltration membrane, which specifically comprises the following steps:

[0031] (1) Spread the non-woven fabric base material with an area density of 30g / ㎡ on the internally grounded metal plate 5;

[0032] (2) Mix graphene oxide and nano-silicon dioxide in proportion in a reaction vessel, stir and react at 10°C for 1 hour under non-neutral conditions, and extract the product to obtain a graphene oxide / silicon dioxide composite;

[0033] (3) Dissolve the high molecular polymer polyacrylonitrile, graphene oxide / silica composite with a mixing ratio of 5:4 in a solvent with a mixing ratio of methanol and ethanol of 3:1, stir until completely dissolved, and obtain a spinning Solution, the mass percentage concentration of spinning solution is 8wt%;

[0034] (4) Add the spinning solution prepared in step (3) into the syringe pump 1, control the ambient humidity to 20%, and th...

Embodiment 2

[0038] The invention discloses a preparation method of graphene oxide / silicon dioxide / polymer composite nanofiltration membrane, which specifically comprises the following steps:

[0039] (1) Spread the non-woven fabric base material with an area density of 50g / ㎡ on the internally grounded metal plate 5;

[0040] (2) Mix graphene oxide and nano-silicon dioxide in proportion in a reaction vessel, stir and react at 40°C for 8 hours under non-neutral conditions, and extract the product to obtain a graphene oxide / silicon dioxide composite;

[0041] (3) Dissolve the high molecular polymer polyvinylidene fluoride and graphene oxide / silica composite with a mixing ratio of 5:4 in a solvent with a mixing ratio of formic acid and acetic acid of 3:1, and stir until completely dissolved to obtain a spinning Silk solution, the mass percentage concentration of spinning solution is 15wt%;

[0042] (4) Add the spinning solution prepared in step (3) into the syringe pump 1, control the ambien...

Embodiment 3

[0046] The invention discloses a preparation method of graphene oxide / silicon dioxide / polymer composite nanofiltration membrane, which specifically comprises the following steps:

[0047] (1) Spread the non-woven fabric base material with an area density of 75g / ㎡ on the internally grounded metal plate 5;

[0048] (2) Mix graphene oxide and nano-silicon dioxide in proportion in a reaction vessel, stir and react at 80°C for 15 hours under non-neutral conditions, and extract the product to obtain a graphene oxide / silicon dioxide composite;

[0049] (3) Dissolve high molecular polymer polyurethane and graphene oxide / silica composite in a mixing ratio of 5:4 in a solvent of formic acid and acetic acid in a mixing ratio of 3:1, and stir until completely dissolved to obtain a spinning solution. The mass percentage concentration of spinning solution is 20wt%;

[0050] (4) Add the spinning solution prepared in step (3) into the syringe pump 1, control the ambient humidity to 60%, and ...

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Abstract

The invention discloses an oxidized graphene / silicon dioxide / high-molecular polymer composite nano-filtration membrane preparation method which includes the specific steps: preparing an oxidized graphene / silicon dioxide composite; dissolving the composite and high-molecular polymer in solvents to prepare spinning solution; preparing oxidized graphene / silicon dioxide / high-molecular polymer composite nano-filtration membrane filtering layer materials; preparing nonwoven / oxidized graphene / silicon dioxide / high-molecular polymer composite nano-filtration membrane filtering materials; drying the materials to obtain an oxidized graphene / silicon dioxide / high-molecular polymer composite nano-filtration membrane. The oxidized graphene / silicon dioxide / high-molecular polymer composite nano-filtration membrane prepared by the oxidized graphene / silicon dioxide / high-molecular polymer composite nano-filtration membrane preparation method has good filtering and adsorbing effects and has the functions of preventing PM2.5 (particulate matter 2.5) haze, releasing negative ions, low-temperature far infrared function, bacteria resistance and bacteriostasis, ultraviolet resistance and the like.

Description

technical field [0001] The invention relates to the technical field of air filtration, in particular to a method for preparing a graphene oxide / silicon dioxide / polymer composite nanofiltration membrane. Background technique [0002] In recent years, the rapid increase in the number of automobiles in my country and the rapid development of industrialization have led to the deterioration of air quality, and the duration of smog days has become longer and longer. Continuous smog weather has had a very serious impact on human health and daily life. As a result, various diseases are caused, including respiratory diseases such as asthma, respiratory tract infection, and lung infection, which have a very serious impact on people's health, especially for groups with weak immunity such as children and the elderly. [0003] Sources of toxic particulate matter in cities: automobile exhaust. Vehicles that use diesel are the “repeat offenders” that emit fine particulate matter. Although s...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D71/34B01D71/42B01D71/54B01J20/26B01J20/30B01J20/28
CPCB01D67/0079B01D69/02B01D69/12B01D71/34B01D71/42B01D71/54B01D2325/48B01J20/103B01J20/20B01J20/261B01J20/262B01J20/28033
Inventor 曲丽君田明伟周珍卉马志友朱士凤
Owner QINGDAO UNIV
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