Preparation method of graphene oxide and polyvinyl alcohol hybrid aerogel

A polyvinyl alcohol and aerogel technology, which is applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the pollution of heavy metal dyes, low utilization rate, and difficulty in recycling granular structure adsorption materials, etc. problem, to achieve the effect of high-efficiency adsorption, fast adsorption rate and low price

Inactive Publication Date: 2016-04-27
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, design and propose a preparation method of graphene oxide polyvinyl alcohol hybrid airgel, to solve the problem of heavy metal and dye pollution in water pollution, and to solve the recovery of granular structure adsorption materials Difficult, low-utilization issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The graphene oxide polyvinyl alcohol hybrid airgel preparation process involved in this embodiment includes: preparing graphene oxide dispersion liquid, preparing graphene oxide / chitosan (or titanium dioxide, silicon dioxide, tin oxide) mixed solution, preparing Self-foaming solution, preparation of gel solution and preparation of graphene oxide / chitosan (or titanium dioxide, silicon dioxide, tin oxide) polyvinyl alcohol hybrid airgel five steps, the specific process is:

[0015] (1) Preparation of graphene oxide dispersion: disperse graphene oxide aqueous solution with a concentration of 1-10% by weight, and then ultrasonically vibrate for 0.5-2 hours; the graphene oxide has a lateral size of 0.5-30 microns and a thickness of 1- 10 nanometers;

[0016] (2) Preparation of graphene oxide / chitosan (or titanium dioxide, silicon dioxide, tin oxide) mixed solution: the graphene oxide dispersion liquid prepared in step (1) is fully mixed with distilled water and glacial aceti...

Embodiment 2

[0021] This embodiment is prepared according to the processing steps of embodiment 1, wherein:

[0022] (1) Disperse the graphene oxide aqueous solution with a concentration of 1% by weight, and then ultrasonically vibrate for 2 hours; the graphene oxide has a transverse dimension of 10 microns and a thickness of 1 nanometer;

[0023] (2) prepare graphene oxide / chitosan mixed solution; the graphene oxide dispersion liquid that step (1) is made is fully mixed with distilled water, glacial acetic acid successively to obtain mixed solution, wherein distilled water and glacial acetic acid mass ratio are 1:3 , the concentration of graphene oxide in the mixed solution is 4%, then chitosan powder is dissolved in the mixed solution, mixed and stirred for 3 hours, to prepare chitosan mass fraction is 2%, graphene oxide mass fraction is 1% Graphene oxide / chitosan mixed solution;

[0024] (3) Dissolve polyvinyl alcohol and filler soluble starch in distilled water in turn, and stir in a ...

Embodiment 3

[0028] This embodiment is prepared according to the processing steps of embodiment 1, wherein:

[0029] (1) dispersing the graphene oxide aqueous solution with a concentration of 10% by weight, and then ultrasonically vibrating for 2 hours; the graphene oxide has a lateral dimension of 30 microns and a thickness of 5 nanometers;

[0030] (2) prepare graphene oxide / titanium dioxide mixed solution, fully mix the graphene oxide dispersion liquid that step (1) makes with distilled water to get mixed solution, wherein distilled water and glacial acetic acid mass ratio are 1:1, graphene oxide is mixed The concentration in the solution is 0.1%, and then the titanium dioxide powder is dissolved in the mixed solution, mixed and stirred for 2 hours, to prepare a graphene oxide / titanium dioxide mixed solution with a mass fraction of titanium dioxide of 1.5% and a mass fraction of graphene oxide of 1.5%;

[0031] (3) Dissolve polyvinyl alcohol and filler talc in distilled water in turn, and...

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Abstract

The invention belongs to the technical field of preparation of aerogel having a water treatment function, in particular relates to a preparation method of graphene oxide and polyvinyl alcohol hybrid aerogel. The preparation method comprises the following five processing steps: preparing a graphene oxide dispersing solution; preparing a graphene oxide/chitosan mixed solution; preparing a self-foaming solution; preparing a gel solution; preparing graphene oxide/chitosan and polyvinyl alcohol hybrid aerogel. The preparation method is characterized in that the graphene oxide and polyvinyl alcohol hybrid aerogel is prepared by fully mixing the graphene oxide dispersing solution with distilled water, glacial acetic acid and chitosan powder and then adding polyvinyl alcohol, a filling agent, a cross-linking agent, a foaming agent and a catalyst in the mixture. The graphene oxide and polyvinyl alcohol hybrid aerogel prepared by the invention is strong in water absorbing capacity, high in hydrophily and quick in adsorption rate and can be reused after regeneration and can be used for industrial wastewater treatment. The preparation method of the graphene oxide and polyvinyl alcohol hybrid aerogel, disclosed by the invention, has the advantages that the principle is simple, the operation is easy, processing equipment is simple, the cost of raw materials is low, and the preparation method is beneficial for industrialization.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of functional airgel for water treatment, and relates to a preparation method of graphene oxide polyvinyl alcohol hybrid airgel, in particular to a kind of rapid adsorption of dyes and various heavy metal ions in water, which is easy to recycle and can be regenerated Process for the preparation of recycled aerogels. Background technique: [0002] With the rapid development of society, water pollution is becoming more and more serious, including two kinds of pollution of heavy metals and dyes. Heavy metal pollution mainly comes from industrial pollution, such as electronics, electroplating, chemical industry, tanning, metallurgy, pesticides, medicine, paint, textile printing and dyeing, papermaking, ceramics, inorganic fuel manufacturing and other industries that produce a large amount of wastewater containing heavy metal ions every year; The dye pollution mainly comes from printing and dyein...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/20B01J20/30B01J20/28C02F1/28C02F101/20
CPCB01J20/24B01J20/06B01J20/103B01J20/20B01J20/28047B01J2220/42B01J2220/46B01J2220/4806B01J2220/4825C02F1/28C02F1/281C02F2101/20
Inventor 田明伟曲丽君朱士凤孙亚宁周卉卉陈国华
Owner QINGDAO UNIV
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