A kind of preparation method of graphene modified polyester film

A graphene modification, polyester film technology, applied in the field of polyester film, achieves the effect of realizing multi-functional composite, good lasting tensile strength and anti-ultraviolet performance, and reducing the phenomenon of powder agglomeration

Active Publication Date: 2019-02-15
JIANGSU YUXING FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In terms of enhancing the mechanical properties and anti-ultraviolet properties of polyester films, although there are relevant literature reports at home and abroad, there are few reports on how to achieve high strength and anti-ultraviolet multifunctional composites of polyester films.

Method used

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  • A kind of preparation method of graphene modified polyester film
  • A kind of preparation method of graphene modified polyester film

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preparation example Construction

[0020] A method for preparing a graphene-modified polyester film of the present invention comprises the preparation of a graphene dispersion, the synthesis of a graphene-modified polyester, and the processing and molding of a graphene-modified polyester into a film. The specific steps are as follows.

[0021] (1), preparation of graphene dispersion liquid.

[0022] Add 90mL of concentrated sulfuric acid to the reaction bottle placed in the ice-water bath, add a solid mixture of 2g graphite powder and 4g sodium nitrate under stirring, the particle size of graphite powder is less than 30 μm, the content is greater than 95%, and the carbon content is 99.85%. Then add 10g high manganese Potassium acid potassium was added at least three times, and the reaction temperature was controlled not to exceed 20°C. After stirring for 30 minutes, heat the water bath to 35°C, continue stirring for 5 hours, slowly pour 180mL of deionized water, heat the water bath to 98°C, and continue stirring...

Embodiment 1

[0031] A kind of preparation method of graphene modified polyester film of the present invention, concrete steps are as follows.

[0032] (1), preparation of graphene dispersion liquid.

[0033] Put a 250mL reaction bottle in an ice-water bath, add 90mL of concentrated sulfuric acid to the reaction bottle in the ice-water bath, add a solid mixture of 2g graphite powder and 4g sodium nitrate under stirring, the graphite powder particle size is less than 30μm, and the content is greater than 95%. , carbon content 99.85%, then add 10g of potassium permanganate at least three times, the reaction temperature is controlled not to exceed 20°C, after stirring for 30min, heat the water bath to 35°C, continue stirring for 5h, then slowly pour into 180mL of deionized water , heat the water bath to 98°C, continue to stir for 30 minutes, then add hydrogen peroxide, the solution turns bright yellow, when the reaction is complete without gas, filter while it is hot, wash the product with dil...

Embodiment 2

[0042] A kind of preparation method of graphene modified polyester film of the present invention, concrete steps are as follows.

[0043] (1), preparation of graphene dispersion liquid.

[0044] Put a 250mL reaction bottle in an ice-water bath, add 90mL of concentrated sulfuric acid to the reaction bottle in the ice-water bath, add a solid mixture of 2g graphite powder and 4g sodium nitrate under stirring, the graphite powder particle size is less than 30μm, and the content is greater than 95%. , carbon content 99.85%, then add 10g potassium permanganate in four times, the reaction temperature is controlled not to exceed 20°C, after stirring for 30min, heat the water bath to 35°C, continue stirring for 5h, then slowly pour into 180mL deionized water , heat the water bath to 98°C, continue to stir for 30 minutes, then add hydrogen peroxide, the solution turns bright yellow, when the reaction is complete without gas, filter while it is hot, wash the product with dilute hydrochlo...

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Abstract

The invention relates to a preparation method of graphene modified polyester film. The preparation method comprises following steps: firstly, 0.18 to 1.76wt% of a graphene dispersion liquid is prepared; in synthesis of graphene modified polyester, the graphene dispersion liquid is introduced, and graphene modified polyester is prepared via in-suit polymerization; graphene modified polyester is taken as an A ingredient, normal polyester is taken as a B ingredient, and the A ingredient and the B ingredient are subjected to coextrusion using a T-shaped die heat so as to form an AB double-layer or an ABA three-layer structure; and the graphene modified polyester film with a thickness ranging from 20 to 400 <mu>m is obtained via film casting, two-way stretch, heat setting, and rolling. The A ingredient possesses excellent mechanical properties and anti-UV effect, so that the graphene modified polyester film is provided with excellent and long-lasting tensile strength and anti-ultraviolet capability; and at the same time, the mechanical properties and the anti-ultraviolet capability of the graphene modified polyester film can be adjusted via changing the adding amount of graphene in the graphene modified polyester film, and the graphene modified polyester film possesses excellent thermal compatibility.

Description

technical field [0001] The invention relates to a preparation method of graphene-modified polyester film, in particular to a preparation method of in-situ polymerized functional polyester, which belongs to the technical field of polyester film. Background technique [0002] Polyethylene terephthalate (PET) is one of the most important synthetic materials at present. PET film is widely used for its high mechanical strength, good cold and heat resistance, stable shrinkage and excellent electrical insulation and optical properties. Widely used in packaging, industry, electrical, electronic, magnetic, photosensitive and other fields. [0003] Although polyester films have been produced in China for many years, there are still many problems in terms of product quality stability, variety, and multi-purpose. Therefore, so far, many polyester films with special functions still need to rely on foreign imports. In terms of research on high-performance polyester films, experts and sch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/78C08K3/04C08K5/521C08K5/5333C08K5/134C08K5/526B32B27/06B32B27/36
CPCB32B27/08B32B27/36C08G63/183C08G63/78C08J5/18C08J2367/02C08K3/04C08K5/1345C08K5/521C08K5/526C08K5/5333
Inventor 丁力王冬陆川蒙钊张一丹
Owner JIANGSU YUXING FILM TECH
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