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High-barrier antistatic graphene/polymer nanocomposite sheet/film and preparation method thereof

A nanocomposite and graphene technology, applied in the field of polymer materials, can solve problems such as difficulty in realizing industrialized production, unfavorable industrialized production, complicated process routes, etc., and achieve the effect of simple and easy-to-obtain equipment, easy industrialized production, and reduce diffusion rate

Inactive Publication Date: 2017-04-26
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because this method will introduce organic solvent, can bring environmental pollution problem, so be unfavorable for large-scale industrialized production
In this regard, some foreign researchers have used the method of layer-by-layer self-assembly to construct a highly oriented and layered ordered graphene sheet in the polymer matrix, which can also significantly improve the barrier properties of polymer materials (Jaime C. Grunlan etc., ACS Applied Materials & Interfaces, 2014, 6:9942-9945.), but this preparation method process route is extremely complicated, economic benefit is not high, also is difficult to realize industrialized production

Method used

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  • High-barrier antistatic graphene/polymer nanocomposite sheet/film and preparation method thereof

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Experimental program
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Effect test

Embodiment 1-8

[0031] Table 1 shows the dosage ratio of each component of the examples of the present invention. The preparation process of each example is the same, and the specific steps are: 1) Dry the polyethylene terephthalate in a drying tank at 120° C. for 1 hour, and then dry the The tank temperature was raised to 150°C, and then dried for 5 hours; the graphene was dried in an oven at 50°C for 24 hours to obtain dry raw material components;

[0032] 2) premixing the dried raw material components obtained in step 1) to obtain a premix;

[0033]3) Put the premix obtained in step 2) into the co-rotating parallel twin-screw extruder for melt blending and extrusion, and then the extruded melt enters the layer multiplier through the connector for repeated division-shear-stretch , and finally the melt flows out through the touch head, and the graphene / polyethylene terephthalate nanocomposite sheet / film with a thickness of 0.7±0.1mm and a layer number of 256 layers is obtained by three-roll ...

Embodiment 9

[0035] Carry out according to the same procedure of embodiment 3, just control splitting-shearing-stretching condition, through three-roll calender traction, make the graphene / polyethylene terephthalate that thickness is 0.7 ± 0.1mm, the number of layers is 64 layers Glycol ester nanocomposite sheet / film.

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Abstract

The invention relates to a high-barrier antistatic graphene / polymer nanocomposite sheet / film. Through an incomplete nanosphere crystal or shish-kebab structure of the high-barrier antistatic graphene / polymer nanocomposite sheet / film, the interfacial gap between spherulites in a large spherulite system is eliminated, amorphous area molecular chain movement is limited, a diffusion rate of gas molecules in the structure is reduced and material barrier properties are improved. The high-barrier antistatic graphene / polymer nanocomposite sheet / film comprises, by mass, 100 parts of polymer base resin, 0.005 to 1 part of graphene and 0 to 1.5 parts of a compatibilizer. Through the compatibilizer and a special flow channel structure of the multi-stage drawing extrusion system, graphene dispersion and orientation distribution are adjusted and controlled. The heterogeneous nucleation and space limitation effects of the graphene sheet induce formation of an orientation molecular chain and restricted nanosphere crystal and shish-kebab structures so that amorphous area density can be significantly increased, the interfacial gap between spherulites is reduced, amorphous area molecular chain movement is limited, a diffusion rate of gas molecules in a polymer matrix is reduced, a gas small molecule passing path is extended and the barrier properties of the nanocomposite sheet / film are improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high barrier and antistatic graphene / polymer nanocomposite sheet / film and a preparation method thereof. [0002] technical background [0003] Due to the advantages of good flexibility, easy molding and processing, and not easy to be damaged, polymer materials are becoming more and more important in the packaging field. They are gradually replacing packaging materials such as metal and glass, and are becoming high-performance, lightweight, and environmentally friendly. Coordinated and multi-functional development. However, due to the multiplicity of polymer motion units and the creep properties of polymer materials, polymer materials are permeable in nature, which also limits the development of polymer packaging materials in some aspects. Therefore, the development of polymer packaging materials with high barrier properties has become a research hotspot in various cou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L51/06C08K3/04B29C47/92B29C48/92
CPCC08K3/04B29C48/92B29C2948/9259B29C2948/92704C08J5/18C08J2367/02C08J2451/06C08K2201/006C08K2201/008C08K2201/011C08K2201/017C08L67/02C08L2201/14C08L2203/16C08L51/06
Inventor 徐国敏杨照孙静秦舒浩吉玉碧韦良强
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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