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Polyvinyl alcohol-chitosan-graphene oxide sponge and preparation method thereof

A kind of graphene sponge, polyvinyl alcohol technology, applied in the field of polymer material science

Inactive Publication Date: 2016-04-20
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the research mainly focuses on pure polyvinyl alcohol sponge, and there are few reports on polyvinyl alcohol-chitosan sponge. The water absorption capacity of polyvinyl alcohol-chitosan sponge needs to be further improved, and the wet compression performance needs to be further optimized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] First dissolve polyvinyl alcohol with a degree of polymerization of 1700 in hot water at 90°C to obtain an aqueous solution of polyvinyl alcohol; then add chitosan, graphene oxide, n-pentane, hydrochloric acid and formaldehyde to the aqueous solution of polyvinyl alcohol in sequence, Stir and mix at 30°C for 0.5 hours, the percentage by weight of each raw material is 10% of polyvinyl alcohol, 1% of chitosan, 6% of hydrochloric acid, 15% of formaldehyde, 1.5% of n-pentane, 0.5% of graphene oxide and water Quantity; Pour the mixed solution into a mold, solidify and mold at 60°C for 6 hours, and obtain a polyvinyl alcohol-chitosan-graphene oxide sponge. The water absorption ratio of the obtained polyvinyl alcohol-chitosan-graphene oxide sponge is 1623%, the soybean oil absorption ratio is 2312%, the wet compression modulus is 48.7KPa, and has excellent compression recovery performance in the wet state.

Embodiment 2

[0023] First, dissolve polyvinyl alcohol with a degree of polymerization of 1900 in hot water at 85°C to obtain an aqueous solution of polyvinyl alcohol; then add chitosan, graphene oxide, n-hexane, hydrochloric acid and formaldehyde to the aqueous solution of polyvinyl alcohol in sequence, Stirring and mixing for 1 hour at 32°C, the percentage by weight of each raw material is 12% polyvinyl alcohol, 1.5% chitosan, 7% hydrochloric acid, 15% formaldehyde, 1.5% n-hexane, 0.6% graphene oxide and the balance of water; Pour the mixed liquid into a mold, solidify and mold at 65°C for 8 hours, and obtain a polyvinyl alcohol-chitosan-graphene oxide sponge. The water absorption rate of the obtained polyvinyl alcohol-chitosan-graphene oxide sponge is 1542%, the pump oil absorption rate is 2237%, the wet state compression modulus is 52.6KPa, and has excellent compression recovery performance in the wet state.

Embodiment 3

[0025] First dissolve polyvinyl alcohol with a degree of polymerization of 2400 in hot water at 90°C to obtain an aqueous solution of polyvinyl alcohol; then add chitosan, graphene oxide, isopentane, sulfuric acid and formaldehyde to the aqueous solution of polyvinyl alcohol in sequence, Stirring and mixing for 1.5 hours at 28°C, the percentage by weight of each raw material is 10% polyvinyl alcohol, 2% chitosan, 80% sulfuric acid, 15% formaldehyde, 1.5% isopentane, 0.2% graphene oxide and water Quantity; Pour the mixed solution into a mold, solidify and mold at 70°C for 10 hours to obtain a polyvinyl alcohol-chitosan-graphene oxide sponge. The obtained polyvinyl alcohol-chitosan-graphene oxide sponge has a water absorption rate of 1442%, a chloroform absorption rate of 3124%, a wet compression modulus of 56.8KPa, and excellent compression recovery performance in a wet state.

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Abstract

The invention relates to polyvinyl alcohol-chitosan-graphene oxide sponge and a preparation method thereof. The preparation method comprises the following steps: dissolving polyvinyl alcohol in hot water to obtain an aqueous solution of polyvinyl alcohol; sequentially adding chitosan, graphene oxide, a foaming agent, inorganic acid and formaldehyde and stirring and mixing; pouring the mixed liquid into a mould; and curing and forming to obtain the polyvinyl alcohol-chitosan-graphene oxide sponge. Compared with the prior art, the polyvinyl alcohol-chitosan-graphene oxide sponge and a preparation method thereof have the following remarkable characteristics: 1) the prepared sponge has the advantages unavailable when the three materials are used independently; 2) the water absorption rate of the polyvinyl alcohol-chitosan-graphene oxide sponge is over 1410% and up to 1920%, the wet-state compression modulus is 40-60KPa, and the polyvinyl alcohol-chitosan-graphene oxide sponge has the advantages of moderate hardness, good compression elasticity and the like; and 3) the properties such as water absorbing capacity, organic liquid absorbing capacity and wet-state compression modulus of the sponge can be controlled by controlling the content of each component in the sponge formula.

Description

technical field [0001] The invention relates to a polyvinyl alcohol-chitosan-graphene oxide sponge and a preparation method thereof, belonging to the field of polymer material science. Background technique [0002] Polyvinyl alcohol is currently the most productive water-soluble polymer. It is a white powdery polymer with a semi-crystalline structure, has good tissue compatibility, and has no toxic or side effects. Polyvinyl alcohol can form a film with good flexibility and high tensile strength. The hydroxyl group on the polyvinyl alcohol molecular chain can react with the carbonyl group of the carbonyl compound to form an acetal compound. Among them, the polyvinyl formal sponge material has a certain water absorption capacity, and the sponge has compressible resilience after absorbing liquid. It can be widely used in increasingly clean and other fields. [0003] Chitosan is the product of partial deacetylation of chitin, and is a kind of basic aminopolysaccharide macromo...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L5/08C08K3/04C08J9/14
CPCC08J9/141C08J2329/04C08J2405/08C08L29/04C08L5/08C08K3/04
Inventor 李亮陈静喻湘华黄华波张桥
Owner WUHAN INSTITUTE OF TECHNOLOGY
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