Blend film containing graphene and preparation method thereof

A blended film, graphene technology, applied in semiconductor devices, photovoltaic power generation, electrical components and other directions, can solve problems such as poor dispersion effect, decreased mechanical properties of materials, poor adhesion properties, etc., to eliminate melt fracture, The effect of reducing crystallinity and improving surface properties

Inactive Publication Date: 2016-01-06
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problems to be solved in the present invention are the following three: 1. In the prior art, the bonding performance between the back film and the back plate base material is relatively poor, and when the PVDF film is modified with titanium dioxide, the titanium dioxide is prone to agglomeration , the dispersion effect in the PVDF matrix is ​​not good, which will reduce the mechanical properties of the material

Method used

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  • Blend film containing graphene and preparation method thereof
  • Blend film containing graphene and preparation method thereof
  • Blend film containing graphene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] According to KH570: Nano titanium dioxide volume mass fraction ratio 15ml: 1g weighs the reactant, first puts the nano titanium dioxide powder in a vacuum drying oven at 50 degrees, places it for 12 hours to remove moisture, then dissolves it in absolute ethanol, then adds KH570 reagent, The obtained mixed solution was ultrasonically treated at a temperature of 50 degrees to evaporate ethanol, and then ground and stirred in a stirred reactor for 1 hour, and finally the obtained mixture was filtered with absolute ethanol and dried to obtain modified titanium dioxide powder.

[0039] Titanium dioxide graft, PVDF, PMMA, PPA and graphene are mixed according to the mass fraction of 4~8:55~65:35~45:4~8:3~4, the mixing method is mechanical stirring, and the stirring rate is 100 rpm, the time is 5 minutes, then the extruder extrudes and granulates, and the extrusion parameters are:

[0040] Table 1 Extruder granulation parameters

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Embodiment 2

[0050] According to KH570: nano-titanium dioxide volume mass fraction ratio 5ml: 1g weighs the reactant, first puts the nano-titanium dioxide powder in a vacuum drying oven at 50 degrees, places it for 12 hours to remove moisture, then dissolves it in absolute ethanol, and then adds KH570 reagent, The obtained mixed solution was ultrasonically treated at a temperature of 50 degrees to evaporate ethanol, and then ground and stirred in a stirred reactor for 1 hour, and finally the obtained mixture was filtered with absolute ethanol and dried to obtain modified titanium dioxide powder.

[0051] Titanium dioxide grafts, PVDF, PMMA, PPA and graphene are mixed according to the mass fraction of 2~10:50~70:30~50:2~10:3~4, and the mixing method is mechanical stirring, and the stirring rate is 100 rpm, the time is 5 minutes, then the extruder extrudes and granulates, and the extrusion parameters are:

[0052] Table 3 extruder granulation parameters

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Embodiment 3

[0058] Weigh the reactants by KH570: nanometer titanium dioxide volume mass fraction ratio 20ml: 1g, first place the nanometer titanium dioxide powder in a vacuum drying oven at 50 degrees, place it for 12 hours to remove moisture, then dissolve it in absolute ethanol, then add KH570 reagent, The obtained mixed solution was ultrasonically treated at a temperature of 50 degrees to evaporate ethanol, and then ground and stirred in a stirred reactor for 1 hour, and finally the obtained mixture was filtered with absolute ethanol and dried to obtain modified titanium dioxide powder.

[0059] Titanium dioxide graft, PVDF, PMMA, PPA and graphene are mixed according to the mass fraction of 2~10:50~70:30~50:4~8:2~5, the mixing method is mechanical stirring, and the stirring rate is 100 rpm, the time is 5 minutes, then the extruder extrudes and granulates, and the extrusion parameters are:

[0060] Table 5 Extruder granulation parameters

[0061] a district

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Abstract

The invention is suitable for preparing a solar cell back film, and provides a blend film containing graphene and a preparation method thereof. The blend film is a blend membrane of titanium dioxide graft, PVDF, PMMA, PPA and graphene, and the titanium dioxide graft is modified titanium dioxide with a silane coupling agent KH570 grafted on the surface. In the existence of the graft, the titanium dioxide has non-uniformity phenomenon in the blend membrane, so that when the blend membrane is used as the solar cell back film, the cohesive force between the film and other backboard base materials is greatly increased, and the existence of the PMMA, PPA and graphene also improves the aging resistance, heat conductivity and surface smoothness of the solar cell back membrane. The preparation method comprises the following steps: first grafting the silane coupling agent KH570 onto the surface of the titanium dioxide, mixing weighted TiO2 graft, PVDF, PMMA, PPA and graphene, uniformly mixing, extruding to form strips, cutting the strips into granules, drying the granules, extruding the granules by virtue of a single screw, and tape casting to obtain the blend film.

Description

technical field [0001] The invention relates to a functional film and a preparation method thereof, in particular to a graphene-containing blend film and a preparation method thereof. Background technique [0002] PVDF (polyvinylidene fluoride) piezoelectric material has unique pyroelectric effect and piezoelectric effect, and is a new type of functional polymer material. PVDF is a fluorine-containing multifunctional material formed by homopolymerization or copolymerization of vinylidene fluoride monomer. It is a linear crystalline polymer, and its crystallinity is generally between 50% and 70%. Due to the high binding energy of the fluorocarbon chain, it has good heat resistance and corrosion resistance. The applicable temperature range is -40 to 150 degrees. Excellent anti-ultraviolet performance and non-polarity, anti-pollution and other characteristics, so PVDF is regarded as one of the important film materials for preparing solar back film. However, the extremely stro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08L33/12C08L27/12C08K3/04C08K9/06C08K3/22H01L31/049
CPCY02E10/50
Inventor 李玲陈思繁宋浩
Owner SHENZHEN UNIV
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