A kind of blend film containing graphene and preparation method thereof

A technology of blended film and graphene, which is applied in the direction of semiconductor devices, photovoltaic power generation, electrical components, etc., can solve the problems of poor bonding performance, poor dispersion effect, and degradation of material mechanical properties, so as to reduce the degree of crystallization and eliminate melting. Bulk cracking phenomenon, film quality improvement effect

Inactive Publication Date: 2017-06-30
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of blend film containing graphene and preparation method thereof
  • A kind of blend film containing graphene and preparation method thereof
  • A kind of blend film containing graphene and preparation method thereof

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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

[0041] a district Second District ...

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

[0053] a district Secon...

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 Second District ...

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Abstract

The invention is applicable to the preparation of solar cell back film, and provides a blend film containing graphene and a preparation method thereof, wherein the blend film is a blend film of titanium dioxide graft, PVDF, PMMA, PPA and graphene , the titanium dioxide graft is modified titanium dioxide with silane coupling agent KH570 grafted on the surface. Due to the existence of the graft, the present invention overcomes the uneven phenomenon of titanium dioxide in the blended film, and when used for the back film of solar cells, the adhesion between the film and other back plate substrates is also greatly enhanced, PMMA, PPA and graphite The presence of alkene also improves the aging resistance, thermal conductivity and surface smoothness of the back film of the solar cell. The preparation method is: first graft the silane coupling agent KH570 on the surface of titanium dioxide, and then weigh the TiO2 according to the mass ratio. 2 The graft, PVDF, PMMA, PPA, and graphene are mixed, stirred evenly, extruded into strips, cut into pellets, dried, and casted by single-screw extrusion to obtain the blended 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 Patents(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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