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Preparation method of bendable polylactic acid transparent conductive film

A transparent conductive film, polylactic acid technology, applied in the conductive layer on the insulating carrier, conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, etc., can solve the problem of mechanical and electrical performance degradation, instability, Problems such as uneven dispersion of graphene, to achieve the effect of simple preparation method, control thickness, and high electrical conductivity

Pending Publication Date: 2022-04-12
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the uneven dispersion of graphene in the polymer will lead to the decline or instability of mechanical properties and electrical properties.

Method used

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  • Preparation method of bendable polylactic acid transparent conductive film

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The molecular weight is M w The polylactic acid of =212921 is added to the chloroform solvent at a concentration of 0.05-0.5g / ml, and dissolved at 25°C for 24 hours; the graphene oxide aqueous solution is added to the tetrahydrofuran or chloroform solvent to make it uniformly dispersed at 25°C. Pour the above graphene oxide solution into the polylactic acid solution so that the mass fraction of the polylactic acid is 0.5wt%, and stir evenly at 50-70° C. to reduce the graphene. Polylactic acid / graphene films with different thicknesses were prepared by spin coating and dried in a vacuum oven for 24 hours.

Embodiment 2

[0026] The molecular weight is M w The polylactic acid of =212921 is added to the chloroform solvent at a concentration of 0.05-0.5g / ml, and dissolved at 25°C for 24 hours; the graphene oxide aqueous solution is added to the tetrahydrofuran or chloroform solvent to make it uniformly dispersed at 25°C. Pour the above graphene oxide solution into the polylactic acid solution so that the mass fraction of the polylactic acid is 1.5 wt%, and stir evenly at 50-70° C. to reduce the graphene. Polylactic acid / graphene films with different thicknesses were prepared by spin coating and dried in a vacuum oven for 24 hours.

Embodiment 3

[0028] The molecular weight is M w The polylactic acid of =212921 is added to the chloroform solvent at a concentration of 0.05-0.5g / ml, and dissolved at 25°C for 24 hours; the graphene oxide aqueous solution is added to the tetrahydrofuran or chloroform solvent to make it uniformly dispersed at 25°C. Pour the above graphene oxide solution into the polylactic acid solution so that the mass fraction of the polylactic acid is 3.5wt%, and stir evenly at 50-70° C. to reduce the graphene. Polylactic acid / graphene films with different thicknesses were prepared by spin coating and dried in a vacuum oven for 24 hours.

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Abstract

The invention relates to the technical field of high polymer materials, in particular to a preparation method of a bendable polylactic acid transparent conductive film, which comprises the following steps: adding a certain amount of polylactic acid into a chloroform solvent to completely dissolve the high polymer material, and dispersing a certain amount of graphene oxide aqueous solution into tetrahydrofuran or chloroform solvent to obtain a transparent conductive film; the preparation method comprises the following steps: uniformly dispersing graphene oxide, adding the graphene oxide into a polylactic acid solution, regulating and controlling the stirring temperature to reduce the graphene oxide into graphene, and preparing polylactic acid / graphene films with different thicknesses by utilizing a spin-coating method. The transparent polylactic acid / graphene film prepared by the invention has excellent conductivity and bendability. In addition, the preparation method disclosed by the invention is simple and flexible, the thickness of the film can be effectively controlled, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a preparation method of a flexible polylactic acid transparent conductive film. Background technique [0002] Polylactic acid is an environmentally friendly biodegradable polymer, which has attracted much attention due to its excellent mechanical properties and its hydrolyzed products are harmless to humans and the environment. Due to the performance problems of PLA, many research groups have made great efforts to improve the mechanical properties and electrical conductivity of PLA composites by adding various carbon nanotubes, such as carbon nanotubes and graphene. [0003] Graphene is a two-dimensional nanomaterial composed of one layer of carbon atoms. Due to its excellent electrical properties, high light transmittance, and high specific surface area, graphene has great potential in various applications such as sensors, semiconductors, and medical monitors. Good ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14H01B1/24H01B13/00
Inventor 李美贤任煜张伟张广宇莫慧琳
Owner NANTONG UNIVERSITY
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