CN105521770A - Preparation method of graphene oxide and polyvinyl alcohol hybrid aerogel - Google Patents
Preparation method of graphene oxide and polyvinyl alcohol hybrid aerogel Download PDFInfo
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- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/4825—Polysaccharides or cellulose materials, e.g. starch, chitin, sawdust, wood, straw, cotton
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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:
The invention belongs to treatment function aeroge preparing technical field, relate to a kind of preparation method of graphene oxide polyvinyl alcohol hybrid aerogel, a particularly dye well contents of many kinds of heavy metal ion in quick adsorption water, is convenient to reclaim, the preparation method of the renewable aeroge recycled.
Background technology:
With developing rapidly of society, water pollution is more and more serious, comprises heavy metal and dyestuff two kinds pollution.The pollution of heavy metal is mainly derived from industrial pollution, as all produced a large amount of waste water containing heavy metal ion every year in the industries such as electronics, plating, chemical industry, process hides, metallurgy, agricultural chemicals, medicine, paint, textile printing and dyeing, papermaking, pottery, inorganic fuel manufacture; And the pollution of dyestuff is mainly derived from dyeing waste water.If by these direct discharging of waste water in rivers, lake, water body environment will be caused to go from bad to worse, and have influence on the health of the mankind by food chain, bring huge disaster to the mankind.At present, for the material mainly grain structure that heavy metal and dyeing waste water adsorb, reclaim more difficult, utilization rate is lower, and rarely has report with sorbing material prepared by aeroge form.In the prior art, China Patent No. is a kind of Polyvinyl-alcohol imbibition sponge material of 201310373062 and preparation method thereof, it is the preparation method that base material obtains polyvinylalcohol sponge that the manufacture method that China Patent No. is gluey sorbing material of a kind of airsetting utilizing waste polyethylene alcohol sponge to prepare of 201310036971 and preparation method thereof is a kind of sponge of removing ornaments and formal dress of 201210229250 with the patent No. all discloses with polyvinyl alcohol, but application is mainly medical.
Graphene oxide is the Main Derivatives of Graphene, has good compatibility and adsorption effect, shows huge application potential in fields such as composite, intellectual material, electronic device, energy storage and pharmaceutical carriers.Therefore, seek the preparation method designing a kind of graphene oxide polyvinyl alcohol hybrid aerogel, graphene oxide and (shitosan, titanium dioxide, silica, tin oxide) is utilized to carry out modification to it, prepare the polyvinyl alcohol hybrid aerogel that absorption property is more superior, and being applied to water treatment field, this its preparation process is so far there are no report.
Summary of the invention:
The object of the invention is to the shortcoming overcoming prior art existence, design proposes a kind of preparation method of graphene oxide polyvinyl alcohol hybrid aerogel, to solve the problem of heavy metal and dye discoloration in water pollution, solve grain structure sorbing material and reclaim the problem difficult, utilization rate is low.
In order to realize foregoing invention object, the graphene oxide polyvinyl alcohol hybrid aerogel step of preparation process that the present invention relates to comprises preparation graphene oxide dispersion, prepares graphene oxide/shitosan (or titanium dioxide, silica, tin oxide) mixed solution, prepares from foaming solution, prepares gel solution and prepare graphene oxide/shitosan (or titanium dioxide, silica, tin oxide) polyvinyl alcohol hybrid aerogel five steps, and its specific embodiment is:
(1) graphene oxide dispersion is prepared: be that the graphene oxide water solution of 1-10% is disperseed by weight percent concentration, then sonic oscillation 0.5-2 hour; Described graphene oxide lateral dimension 0.5-30 micron, thickness 1-10 nanometer;
(2) graphene oxide/shitosan (or titanium dioxide is prepared, silica, tin oxide) mixed solution: by graphene oxide dispersion obtained for step (1) successively with distilled water, glacial acetic acid is fully mixed to get mixed solution, wherein distilled water and glacial acetic acid mass ratio are 1:(1-3), the concentration of graphene oxide in mixed solution is 0.1-5%, again by Chitosan powder (or titanium dioxide, silica, tin oxide) be dissolved in mixed solution, mix and blend 1-10 hour, to prepare shitosan (or titanium dioxide, silica, tin oxide) mass fraction is 0.1-5%, graphene oxide mass fraction is the graphene oxide/shitosan mixed solution of 0.1-5%, wherein, titanium dioxide particle diameter 200 nanometer-20 microns, silica particle diameter 300 nanometer-40 microns, tin oxide particle diameter 500 nanometer-60 microns,
(3) preparation is from foaming solution: polyvinyl alcohol and filler are dissolved in distilled water successively, and at 70-100 DEG C of stirred in water bath 0.5-3 hour, to dissolve completely; Then graphene oxide/shitosan (or titanium dioxide, silica, tin oxide) mixed solution that second step is obtained is added, obtained from foaming solution; Wherein, the mass ratio of polyvinyl alcohol and filler is 1:1-1:5, in foaming solution, the weight percent concentration of polyvinyl alcohol is 5-15%, polyvinyl alcohol and shitosan (or titanium dioxide, silica, tin oxide) mass ratio are 1:1-5:1, and shitosan and graphene oxide mass ratio are 1:1-10:1; Filler is soluble starch or talcum powder;
(4) gel solution is prepared: add crosslinking agent, blowing agent and catalyst successively in foaming solution, stir while adding, until mix to obtain gel solution; Wherein, the volume ratio of crosslinking agent and mixed solution is 1:(2-5), the volume ratio of crosslinking agent, blowing agent and catalyst is 1:(0.5-1): (0.5-2); Crosslinking agent comprises formaldehyde and glutaraldehyde; Blowing agent comprises pentane, Celogen Az and to benzene sulfonyl hydrazide; Catalyst comprises sulfuric acid, hydrochloric acid and glacial acetic acid;
(5) prepare graphene oxide polyvinyl alcohol hybrid aerogel: pour in mould by mixed uniformly gel solution, at 40-80 DEG C, solidify 1-3h, obtain graphene oxide polyvinyl alcohol hybrid aerogel.
The present invention compared with prior art, aeroge uniform foam cell, pliability and good springiness, water absorbing capacity is strong, have high-hydrophilic, the rate of adsorption is fast, can dyestuff fast and efficiently in adsorbed water and contents of many kinds of heavy metal ion, and the aeroge after absorption is convenient to reclaim, reusable after regeneration, there is recyclability, can be used for Industrial Wastewater Treatment; Preparation method's principle is simple, processing ease, and process equipment is simple, raw materials used cheap, is conducive to industrialization.
Detailed description of the invention:
Below by specific embodiment, the invention will be further described.
Embodiment 1:
The graphene oxide polyvinyl alcohol hybrid aerogel preparation technology that the present embodiment relates to comprises: prepare graphene oxide dispersion, prepare graphene oxide/shitosan (or titanium dioxide, silica, tin oxide) mixed solution, prepare from foaming solution, prepare gel solution and prepare graphene oxide/shitosan (or titanium dioxide, silica, tin oxide) polyvinyl alcohol hybrid aerogel five steps, its specific embodiment is:
(1) graphene oxide dispersion is prepared: be that the graphene oxide water solution of 1-10% is disperseed by weight percent concentration, then sonic oscillation 0.5-2 hour; Described graphene oxide lateral dimension 0.5-30 micron, thickness 1-10 nanometer;
(2) graphene oxide/shitosan (or titanium dioxide is prepared, silica, tin oxide) mixed solution: by graphene oxide dispersion obtained for step (1) successively with distilled water, glacial acetic acid is fully mixed to get mixed solution, wherein distilled water and glacial acetic acid mass ratio are 1:(1-3), the concentration of graphene oxide in mixed solution is 0.1-5%, again by Chitosan powder (or titanium dioxide, silica, tin oxide) be dissolved in mixed solution, mix and blend 1-10 hour, to prepare shitosan (or titanium dioxide, silica, tin oxide) mass fraction is 0.1-5%, graphene oxide mass fraction is the graphene oxide/shitosan mixed solution of 0.1-5%, wherein, titanium dioxide particle diameter 200 nanometer-20 microns, silica particle diameter 300 nanometer-40 microns, tin oxide particle diameter 500 nanometer-60 microns,
(3) preparation is from foaming solution: polyvinyl alcohol and filler are dissolved in distilled water successively, and at 70-100 DEG C of stirred in water bath 0.5-3 hour, to dissolve completely; Then graphene oxide/shitosan (or titanium dioxide, silica, tin oxide) mixed solution that second step is obtained is added, obtained from foaming solution; Wherein, the mass ratio of polyvinyl alcohol and filler is 1:1-1:5, in foaming solution, the weight percent concentration of polyvinyl alcohol is 5-15%, polyvinyl alcohol and shitosan (or titanium dioxide, silica, tin oxide) mass ratio are 1:1-5:1, and shitosan and graphene oxide mass ratio are 1:1-10:1; Filler is soluble starch or talcum powder;
(4) gel solution is prepared: add crosslinking agent, blowing agent and catalyst successively in foaming solution, stir while adding, until mix to obtain gel solution; Wherein, the volume ratio of crosslinking agent and mixed solution is 1:(2-5), the volume ratio of crosslinking agent, blowing agent and catalyst is 1:(0.5-1): (0.5-2); Crosslinking agent comprises formaldehyde and glutaraldehyde; Blowing agent comprises pentane, Celogen Az and to benzene sulfonyl hydrazide; Catalyst comprises sulfuric acid, hydrochloric acid and glacial acetic acid;
(5) prepare graphene oxide polyvinyl alcohol hybrid aerogel: pour in mould by mixed uniformly gel solution, at 40-80 DEG C, solidify 1-3h, obtain graphene oxide polyvinyl alcohol hybrid aerogel.
Embodiment 2:
The present embodiment is prepared according to the processing step of embodiment 1, wherein:
(1) by weight percent concentration be 1% graphene oxide water solution disperse, then sonic oscillation 2 hours; Described graphene oxide lateral dimension 10 microns, thickness 1 nanometer;
(2) graphene oxide/shitosan mixed solution is prepared; The graphene oxide dispersion that step (1) is obtained is fully mixed to get mixed solution with distilled water, glacial acetic acid successively, wherein distilled water and glacial acetic acid mass ratio are 1:3, the concentration of graphene oxide in mixed solution is 4%, again Chitosan powder is dissolved in mixed solution, mix and blend 3 hours, graphene oxide/shitosan mixed solution that chitosan mass mark is 2% to prepare, graphene oxide mass fraction is 1%;
(3) successively polyvinyl alcohol and filler soluble starch are dissolved in distilled water, and 70 DEG C of stirred in water bath 3 hours, to dissolve completely; Then graphene oxide/shitosan mixed solution is added, to prepare from foaming solution; Wherein, the mass ratio of polyvinyl alcohol and filler soluble starch is 1:1, and in foaming solution, the weight percent concentration of polyvinyl alcohol is 5%, and polyvinyl alcohol and chitosan mass are than being 1:1, and shitosan and graphene oxide mass ratio are 10:1;
(4) add crosslinking agent, blowing agent and catalyst successively in foaming solution, stir while adding, until mix to obtain gel solution; Wherein, the volume ratio of crosslinking agent and mixed solution is 1:2, and the volume ratio of crosslinking agent, blowing agent and catalyst is 1:0.5:0.5, and crosslinking agent is glutaraldehyde, and blowing agent is pentane, and catalyst is sulfuric acid;
(5) gel solution is poured in mould, at 40 DEG C, solidify 1h, obtain graphene oxide polyvinyl alcohol hybrid aerogel.
Embodiment 3:
The present embodiment is prepared according to the processing step of embodiment 1, wherein:
(1) by weight percent concentration be 10% graphene oxide water solution disperse, then sonic oscillation 2 hours; Described graphene oxide lateral dimension 30 microns, thickness 5 nanometer;
(2) graphene oxide/titanium dioxide mixed solution is prepared, the graphene oxide dispersion obtained by step (1) and distilled water are fully mixed to get mixed solution, wherein distilled water and glacial acetic acid mass ratio are 1:1, the concentration of graphene oxide in mixed solution is 0.1%, again titania powder is dissolved in mixed solution, mix and blend 2 hours, graphene oxide/titanium dioxide mixed solution that titanium dioxide mass fraction is 1.5% to prepare, graphene oxide mass fraction is 1.5%;
(3) successively polyvinyl alcohol and filler talcum powder are dissolved in distilled water, and 100 DEG C of stirred in water bath 0.5 hour, to dissolve completely; Then graphene oxide/titanium dioxide mixed solution is added, to prepare from foaming solution; Wherein, polyvinyl alcohol and the talcous mass ratio of filler are 1:5, and in foaming solution, the weight percent concentration of polyvinyl alcohol is 15%, and polyvinyl alcohol and titanium dioxide mass ratio are 5:1, and titanium dioxide and graphene oxide mass ratio are 10:1;
(4) add crosslinking agent, blowing agent and catalyst successively in foaming solution, stir while adding, until mix to obtain gel solution; Wherein, the volume ratio of crosslinking agent and mixed solution is 1:5, and the volume ratio of crosslinking agent, blowing agent and catalyst is 1:1:2, and crosslinking agent is formaldehyde, and blowing agent is Celogen Az, and catalyst is sulfuric acid;
(5) gel solution is poured in mould, at 80 DEG C, solidify 3h, obtain graphene oxide polyvinyl alcohol hybrid aerogel.
Embodiment 4:
The present embodiment is prepared according to the processing step of embodiment 1, wherein:
(1) by weight percent concentration be 3% graphene oxide water solution disperse, then sonic oscillation 0.5 hour; Described graphene oxide lateral dimension 20 microns, thickness 10 nanometer;
(2) graphene oxide/silica mixed solution is prepared, the graphene oxide dispersion obtained by step (1) and distilled water are fully mixed to get mixed solution, wherein distilled water and glacial acetic acid mass ratio are 1:2.5, the concentration of graphene oxide in mixed solution is 5%, again SiO 2 powder is dissolved in mixed solution, mix and blend 10 hours, graphene oxide/silica mixed solution that silica quality mark is 0.1% to prepare, graphene oxide mass fraction is 0.1%;
(3) successively polyvinyl alcohol and filler talcum powder are dissolved in distilled water, and 90 DEG C of stirred in water bath 2 hours, to dissolve completely; Then graphene oxide/silica mixed solution is added, to prepare from foaming solution; Wherein, polyvinyl alcohol and the talcous mass ratio of filler are 1:2, and in foaming solution, the weight percent concentration of polyvinyl alcohol is 10%, and polyvinyl alcohol and silica quality are than being 1:2, and silica and graphene oxide mass ratio are 5:1;
(4) add crosslinking agent, blowing agent and catalyst successively in foaming solution, stir while adding, until the gel solution mixed; Wherein, the volume ratio of crosslinking agent and mixed solution is 1:3, and the volume ratio of crosslinking agent, blowing agent and catalyst is 1:0.8:1.2, and crosslinking agent is formaldehyde, and blowing agent is Celogen Az, and catalyst is sulfuric acid;
(5) gel solution is poured in mould, at 80 DEG C, solidify 2h, obtain graphene oxide polyvinyl alcohol hybrid aerogel.
Embodiment 5:
The present embodiment is prepared according to the processing step of embodiment 1, wherein:
(1) by weight percent concentration be 5% graphene oxide water solution disperse, then sonic oscillation 1 hour; Described graphene oxide lateral dimension 0.5 micron, thickness 1 nanometer;
(2) graphene oxide/chitosan/titanium dioxide mixed solution is prepared, the graphene oxide dispersion that step (1) is obtained fully mixes with distilled water, glacial acetic acid successively, wherein distilled water and glacial acetic acid mass ratio are 1:2, the concentration of graphene oxide in mixed solution is 2%, again Chitosan powder and titanium dioxide are dissolved in above-mentioned mixed solution, mix and blend 1 hour, graphene oxide/chitosan/titanium dioxide mixed solution that chitosan mass mark is 5% to prepare, titanium dioxide mass fraction is 5%, graphene oxide mass fraction is 5%;
(3) successively polyvinyl alcohol and filler soluble starch are dissolved in distilled water, and 80 DEG C of stirred in water bath 3 hours, to dissolve completely; Then graphene oxide/chitosan/titanium dioxide mixed solution is added, to prepare from foaming solution; Wherein, the mass ratio of polyvinyl alcohol and filler soluble starch is 1:4, and in foaming solution, the weight percent concentration of polyvinyl alcohol is 7%, and polyvinyl alcohol and chitosan mass are than being 4:1, titanium dioxide and chitosan mass are than being 3:1, and shitosan and graphene oxide mass ratio are 6:1;
(4) add crosslinking agent, blowing agent and catalyst successively in foaming mixed solution, stir while adding, until mix to obtain gel solution; Wherein, the volume ratio of crosslinking agent and mixed solution is 1:4, and the volume ratio of crosslinking agent, blowing agent and catalyst is 1:0.6:1, and crosslinking agent is formaldehyde, and blowing agent is to benzene sulfonyl hydrazide, and catalyst is hydrochloric acid;
(5) gel solution is poured in mould, at 80 DEG C, solidify 1h, obtain graphene oxide polyvinyl alcohol hybrid aerogel.
Embodiment 6:
The present embodiment is prepared according to the processing step of embodiment 1, wherein:
(1) by weight percent concentration be 2% graphene oxide water solution disperse, then sonic oscillation 1 hour; Described graphene oxide lateral dimension 15 microns, thickness 3 nanometer;
(2) graphene oxide/chitosan/titanium dioxide/silica mixed solution is prepared, by graphene oxide dispersion obtained for step (1) successively with distilled water, glacial acetic acid is fully mixed to get mixed solution, wherein distilled water and glacial acetic acid mass ratio are 1:2, the concentration of graphene oxide in mixed solution is 3%, again by Chitosan powder, titanium dioxide, silica is dissolved in mixed solution, mix and blend 6 hours, to prepare chitosan mass mark for 3%, titanium dioxide mass fraction is 2%, silica quality mark is 1%, graphene oxide mass fraction is the graphene oxide/chitosan/titanium dioxide mixed solution of 0.5%,
(3) successively polyvinyl alcohol and filler soluble starch are dissolved in distilled water, and 70 DEG C of stirred in water bath 3 hours, to dissolve completely; Then graphene oxide/chitosan/titanium dioxide/silica mixed solution is added, to prepare from foaming solution; Wherein, the mass ratio of polyvinyl alcohol and filler soluble starch is 1:1.5, in foaming solution, the weight percent concentration of polyvinyl alcohol is 15%, polyvinyl alcohol and chitosan mass are than being 3:1, titanium dioxide and chitosan mass are than being 2:3, silica and chitosan mass are than being 1:3, and shitosan and graphene oxide mass ratio are 10:1;
(4) add crosslinking agent, blowing agent and catalyst successively in foaming solution, stir while adding, until the gel solution mixed; Wherein, the volume ratio of crosslinking agent and mixed solution is 1:2, and the volume ratio of crosslinking agent, blowing agent and catalyst is 1:0.6:1, and crosslinking agent is formaldehyde, and blowing agent is to benzene sulfonyl hydrazide, and catalyst is hydrochloric acid;
(5) gel solution is poured in mould, at 80 DEG C, solidify 1h, obtain graphene oxide polyvinyl alcohol hybrid aerogel.
Embodiment 7:
The present embodiment is prepared according to the processing step of embodiment 1, wherein:
(1) by weight percent concentration be 8% graphene oxide water solution disperse, then sonic oscillation 1.5 hours; Described graphene oxide lateral dimension 25 microns, thickness 7 nanometer;
(2) graphene oxide/chitosan/titanium dioxide/tin oxide mixed solution is prepared, by graphene oxide dispersion obtained for step (1) successively with distilled water, glacial acetic acid is fully mixed to get mixed solution, wherein distilled water and glacial acetic acid mass ratio are 1:3, the concentration of graphene oxide in mixed solution is 5%, again by Chitosan powder, titanium dioxide, tin oxide is dissolved in mixed solution, mix and blend 2 hours, to prepare chitosan mass mark for 3%, titanium dioxide mass fraction is 2%, tin oxide mass fraction is 1%, graphene oxide mass fraction is the graphene oxide/chitosan/titanium dioxide mixed solution of 0.5%,
(3) successively polyvinyl alcohol and filler soluble starch are dissolved in distilled water, and 70 DEG C of stirred in water bath 3 hours, to dissolve completely; Then graphene oxide/chitosan/titanium dioxide/tin oxide mixed solution is added, to prepare from foaming solution; Wherein, the mass ratio of polyvinyl alcohol and filler soluble starch is 1:1.5, in foaming solution, the weight percent concentration of polyvinyl alcohol is 15%, polyvinyl alcohol and chitosan mass are than being 2:1, titanium dioxide and chitosan mass are than being 2:3, tin oxide and chitosan mass are than being 1:3, and shitosan and graphene oxide mass ratio are 10:1;
(4) add crosslinking agent, blowing agent and catalyst successively in foaming solution, stir while adding, until the gel solution mixed; Wherein, the volume ratio of crosslinking agent and mixed solution is 1:2, and the volume ratio of crosslinking agent, blowing agent and catalyst is 1:0.7:1.5, and crosslinking agent is formaldehyde, and blowing agent is to benzene sulfonyl hydrazide, and catalyst is hydrochloric acid;
(5) gel solution is poured in mould, at 80 DEG C, solidify 1h, obtain graphene oxide polyvinyl alcohol hybrid aerogel.
Claims (1)
1. the preparation method of a graphene oxide polyvinyl alcohol hybrid aerogel, it is characterized in that processing step comprises preparation graphene oxide dispersion, prepares graphene oxide/shitosan or titanium dioxide, silica and tin oxide mixed solution, prepares from foaming solution, prepares gel solution and prepare graphene oxide/shitosan or titanium dioxide, silica and tin oxide polyvinyl alcohol hybrid aerogel five steps, its specific embodiment is:
(1) graphene oxide dispersion is prepared: be that the graphene oxide water solution of 1-10% is disperseed by weight percent concentration, then sonic oscillation 0.5-2 hour; Described graphene oxide lateral dimension 0.5-30 micron, thickness 1-10 nanometer;
(2) graphene oxide/shitosan or titanium dioxide is prepared, silica and tin oxide mixed solution: by graphene oxide dispersion obtained for step (1) successively with distilled water, glacial acetic acid is fully mixed to get mixed solution, wherein distilled water and glacial acetic acid mass ratio are 1:1-3, the concentration of graphene oxide in mixed solution is 0.1-5%, again by Chitosan powder or titanium dioxide, silica and tin oxide are dissolved in mixed solution, mix and blend 1-10 hour, to prepare shitosan or titanium dioxide, silica and tin oxide mass fraction are 0.1-5%, graphene oxide mass fraction is the graphene oxide/shitosan mixed solution of 0.1-5%, wherein, titanium dioxide particle diameter 200 nanometer-20 microns, silica particle diameter 300 nanometer-40 microns, tin oxide particle diameter 500 nanometer-60 microns,
(3) preparation is from foaming solution: polyvinyl alcohol and filler are dissolved in distilled water successively, and at 70-100 DEG C of stirred in water bath 0.5-3 hour, to dissolve completely; Then the obtained graphene oxide/shitosan of second step or titanium dioxide, silica and tin oxide mixed solution is added, obtained from foaming solution; Wherein, the mass ratio of polyvinyl alcohol and filler is 1:1-1:5, in foaming solution, the weight percent concentration of polyvinyl alcohol is 5-15%, polyvinyl alcohol and shitosan or titanium dioxide, silica and tin oxide mass ratio are 1:1-5:1, and shitosan and graphene oxide mass ratio are 1:1-10:1; Filler is soluble starch or talcum powder;
(4) gel solution is prepared: add crosslinking agent, blowing agent and catalyst successively in foaming solution, stir while adding, until mix to obtain gel solution; Wherein, the volume ratio of crosslinking agent and mixed solution is 1:2-5, and the volume ratio of crosslinking agent, blowing agent and catalyst is 1:0.5-1:0.5-2; Crosslinking agent comprises formaldehyde and glutaraldehyde; Blowing agent comprises pentane, Celogen Az and to benzene sulfonyl hydrazide; Catalyst comprises sulfuric acid, hydrochloric acid and glacial acetic acid;
(5) prepare graphene oxide polyvinyl alcohol hybrid aerogel: pour in mould by mixed uniformly gel solution, at 40-80 DEG C, solidify 1-3h, obtain graphene oxide polyvinyl alcohol hybrid aerogel.
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