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Method for preparing graphene-based biodegradable composite film used in parks

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

Inactive Publication Date: 2015-03-11
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

[0024] A method for preparing a graphene-based biodegradable composite film for garden use,

[0025] The preparation steps are as follows:

[0026] 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;

[0027] b. Add 10 parts by weight of refined starch, 20 pa...

Embodiment 2

[0033] A method for preparing a graphene-based biodegradable composite film for garden use,

[0034] The preparation steps are as follows:

[0035] 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;

[0036] b. Add 20 parts by weigh...

Embodiment 3

[0042] A method for preparing a graphene-based biodegradable composite film for garden use,

[0043] The preparation steps are as follows:

[0044] 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;

[0045] b. Add 20 parts by weigh...

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Abstract

The invention discloses a method for preparing a graphene-based biodegradable composite film used in parks. The method comprises the following steps: compounding graphene oxide twice so as to comprehensively transforming a film in a graphene manner, adding the following components into 50-100 parts by weight of a caprolactam phenylsulfonic acid ionic liquids: 10-20 parts of refined starch, 20-30 parts of cellulose and 5-10 parts of graphene oxide suspension, and further dropping 30-40 parts of a polylactic acid solution which is dissolved in chloroform so as to obtain a film material. The film material has the advantages of good mechanical property, high thermal stability, high degradability, good biocompatibility and the like, and can be used in the field of parks.

Description

[0001] Technical field [0002] The present invention is a technical field of biodegradable materials, which specially involves a preparation method for gardening using graphene -based biodegradable biodegradable composite films. Background technique [0003] In existing technologies, the field of gardening is very demanding for film, especially for acid and alkalinity and corrosion resistance. At the same time, the mechanics and machinery of the film are also very important during use.At present, the degradable film can be 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 achieved by steel plate running or squeezing the T -shaped head delay method.Regardless of the delay of dry and humidity, there are low production efficiency, high energy consumption, and high costs, and lack of market competitiveness disadvantages.At present, there is no suitable method of...

Claims

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Application Information

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