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Graphene-based biodegradable composite thin film for garden

A graphene-based, composite film technology, applied in coatings and other directions, can solve the problems of lack of market competitiveness, high cost, low production efficiency, etc., and achieve industrial production, good mechanical properties, and high thermal stability. Effect

Inactive Publication Date: 2015-04-01
王秋芹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both dry and wet casting methods have the disadvantages of low production efficiency, high energy consumption, high cost and lack of market competitiveness.
At present, there is no water-soluble biodegradable film of special material prepared by a suitable method in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of garden uses graphene-based biodegradable composite film,

[0023] The preparation steps are as follows:

[0024] a. Put 1g of graphite powder into a round-bottomed flask, then add appropriate amount of 98% concentrated sulfuric acid, potassium permanganate and sodium nitrate in turn, keep warm for 4h under the condition of ice bath, then warm up to room temperature, stir for 1h, then add Add an appropriate amount of deionized water, heat up to 60°C, stir for 1 hour, then add an appropriate amount of hydrogen peroxide, continue to stir until the solution is orange-yellow, and then stand at room temperature for 24 hours, then centrifuge, wash with dilute hydrochloric acid and deionized water twice in sequence, Obtain pure graphene oxide, and dissolve the graphene oxide in deionized water, ultrasonicate for 5-8h, and prepare a graphene oxide suspension with a concentration of 1.5mg / ml;

[0025] b. Add 10 parts by weight of refined starch, 20 parts by weight of c...

Embodiment 2

[0031] A kind of garden uses graphene-based biodegradable composite film,

[0032] The preparation steps are as follows:

[0033] a. Put 5g of graphite powder into a round-bottomed flask, then add an appropriate amount of 98% concentrated sulfuric acid, potassium permanganate and sodium nitrate in sequence, keep it warm for 6 hours in an ice bath, then warm up to room temperature, stir for 2 hours, and then add Add an appropriate amount of deionized water, heat up to 80°C, stir for 2 hours, then add an appropriate amount of hydrogen peroxide, continue to stir until the solution is orange-yellow, then stand at room temperature for 24 hours, and then wash it repeatedly with dilute hydrochloric acid and deionized water for 3 times through centrifugation. Obtain pure graphene oxide, and dissolve the graphene oxide in deionized water, sonicate for 8 hours, and prepare a graphene oxide suspension with a concentration of 1.5 mg / ml;

[0034] b. Add 20 parts by weight of refined starc...

Embodiment 3

[0040] A kind of garden uses graphene-based biodegradable composite film,

[0041] The preparation steps are as follows:

[0042] a. Put 5g of graphite powder into a round-bottomed flask, then add an appropriate amount of 98% concentrated sulfuric acid, potassium permanganate and sodium nitrate in sequence, keep it warm for 6 hours in an ice bath, then warm up to room temperature, stir for 2 hours, and then add Add an appropriate amount of deionized water, heat up to 80°C, stir for 2 hours, then add an appropriate amount of hydrogen peroxide, continue to stir until the solution is orange-yellow, then stand at room temperature for 24 hours, and then wash it repeatedly with dilute hydrochloric acid and deionized water for 3 times through centrifugation. Obtain pure graphene oxide, and dissolve the graphene oxide in deionized water, sonicate for 8 hours, and prepare a graphene oxide suspension with a concentration of 1.5 mg / ml;

[0043] b. Add 20 parts by weight of refined starc...

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Abstract

The invention discloses a graphene-based biodegradable composite thin film for a garden. The thin film is prepared by the following steps: comprehensively carrying out graphenization on the thin film by compounding oxidized graphene two times; meanwhile, adding 10-20 parts of fine starch, 20-30 parts of cellulose and 5-10 parts of an oxidized graphene suspension into 50-100 parts of a caprolactam benzenesulfonic acid ionic liquid; and then dropwise adding 30-40 parts of a polylactic acid solution which is dissolved in chloroform to obtain the thin film. The thin film material has the advantages of good mechanical property, high thermal stability, degradability, good biocompatibility and the like and can be used in the field of gardens.

Description

technical field [0001] The invention belongs to the technical field of biodegradable materials, in particular to a graphene-based biodegradable composite film used in gardens. Background technique [0002] In the prior art, the landscape field has a great demand for films, especially acid and alkali resistance and corrosion resistance. At the same time, the mechanical and mechanical properties of films are also very important during use. Now degradable films are produced with polyvinyl alcohol as the main raw material. Since the melting temperature of polyvinyl alcohol is very close to the decomposition temperature, it is generally realized by steel plate casting or extrusion T-head casting. Both dry and wet casting methods have the disadvantages of low production efficiency, high energy consumption, high cost and lack of market competitiveness. At present, there is no water-soluble biodegradable film of special material prepared by a suitable method in China. [0003] Gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J7/06C08J7/04C08J5/18C08J3/24C08L67/04C08L1/02C08L3/02C08K9/02C08K3/04C08K5/42
Inventor 王秋芹
Owner 王秋芹
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