阅读说明：本技术 一种太阳能电池背板材料的制备方法 (Preparation method of solar cell back plate material ) 是由 李铜玲 于 2018-06-20 设计创作，主要内容包括：本发明公开了一种太阳能电池背板材料的制备方法,先将PVC、PPE、硬脂酸锌、邻苯二甲酸二辛酯和钛酸酯搅拌混合,得到混合物料一；再将混合物料一转入反应设备中,在真空条件下升温后加入羟丙基甲基纤维素和二环己胺,搅拌反应,得到反应物；最后在反应物中加入润滑剂和抗氧化剂,搅拌混合后通过双螺杆挤出机挤出,得到太阳能电池背板材料。本发明提供的方法得到的材料具有优良的电化学性能、耐老化性能、耐水蒸气透过性能。(The invention discloses a preparation method of a solar cell backboard material, which comprises the steps of stirring and mixing PVC, PPE, zinc stearate, dioctyl phthalate and titanate to obtain a first mixed material; transferring the mixed material I into reaction equipment, heating under a vacuum condition, adding hydroxypropyl methyl cellulose and dicyclohexylamine, and stirring for reaction to obtain a reactant; and finally, adding a lubricant and an antioxidant into the reactant, stirring and mixing, and extruding by using a double-screw extruder to obtain the solar cell backboard material. The material obtained by the method provided by the invention has excellent electrochemical performance, aging resistance and water vapor permeation resistance.)

1. A preparation method of a solar cell backboard material is characterized by comprising the following steps:

step 1, stirring and mixing 5-10 parts by weight of PVC, 3-8 parts by weight of PPE, 1-2 parts by weight of zinc stearate, 2-6 parts by weight of dioctyl phthalate and 2-4 parts by weight of titanate to obtain a first mixed material;

step 2, transferring the mixture I into a reaction device, heating to 100-110 ℃ under a vacuum condition, adding 1-3 parts of hydroxypropyl methylcellulose and 1-2 parts of dicyclohexylamine, and stirring for 40-50 minutes to obtain a reactant;

and 3, adding 0.5-1 part of lubricant and 1-3 parts of antioxidant into the reactant, stirring and mixing, and extruding by using a double-screw extruder to obtain the solar cell backboard material.

2. The method as claimed in claim 1, wherein the stirring speed of the stirring and mixing in step 1 is 150-180 rpm, the mixing time is 30-40 min, and the mixing temperature is 40-50 ℃.

3. The method for preparing a solar cell back sheet material according to claim 1, wherein the degree of vacuum under vacuum in step 2 is 0.03 to 0.06 MPa.

4. The method for preparing a solar cell back sheet material according to claim 1, wherein the stirring speed in the step 2 is 80 to 100 rpm.

5. The method for preparing a solar cell back sheet material according to claim 1, wherein the lubricant in the step 3 is barium stearate.

6. The method for preparing a solar cell back sheet material according to claim 1, wherein the antioxidant in step 3 is an antioxidant 1010.

7. The method for preparing the solar cell back sheet material as claimed in claim 1, wherein the extrusion temperature in step 3 is 260-270 ℃.

Technical Field

The invention belongs to the field of solar cell materials, and particularly relates to a preparation method of a solar cell back plate material.

Background

The photovoltaic cell is composed of glass, EVA, a silicon wafer and a back plate, and is formed by packaging according to the structure of the glass, the EVA, the cell plate and the EVA, wherein the back plate is positioned on the outermost layer of the back surface of the photovoltaic cell and is an important component of the photovoltaic cell, so that the packaging effect is achieved, the effect of ensuring that the photovoltaic cell is not influenced by the environment is also achieved, and the service life of the photovoltaic cell is ensured. According to the overall structure division of the photovoltaic cell backboard, the photovoltaic cell backboard can be divided into FPF, FPE, full PET and PET/polyolefin structures. Wherein F is a fluorine-containing film; p is a polyethylene terephthalate film (namely a PET film) prepared by a biaxial stretching process; e is ethylene vinyl acetate (i.e., EVA); polyolefin refers to various plastics having a carbon-carbon structure as a main chain. The structural layers are bonded by using an adhesive, and are prepared and molded by a composite process. The commonly used solar cell backboard material still has some defects, so that the application of the solar cell backboard material is limited, such as poor anti-aging performance, low water vapor transmission rate, good electrical insulation, and the like.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a preparation method of a solar cell backboard material, which improves the electrical property, the aging resistance and the water vapor permeation resistance of the material.

The technical scheme of the invention is as follows:

a preparation method of a solar cell back plate material comprises the following steps:

step 1, stirring and mixing 5-10 parts by weight of PVC, 3-8 parts by weight of PPE, 1-2 parts by weight of zinc stearate, 2-6 parts by weight of dioctyl phthalate and 2-4 parts by weight of titanate to obtain a first mixed material;

step 2, transferring the mixture I into a reaction device, heating to 100-110 ℃ under a vacuum condition, adding 1-3 parts of hydroxypropyl methylcellulose and 1-2 parts of dicyclohexylamine, and stirring for 40-50 minutes to obtain a reactant;

and 3, adding 0.5-1 part of lubricant and 1-3 parts of antioxidant into the reactant, stirring and mixing, and extruding by using a double-screw extruder to obtain the solar cell backboard material.

Further, in the preparation method of the solar cell back plate material, the stirring speed of stirring and mixing in the step 1 is 150-180 r/min, the mixing time is 30-40 min, and the mixing temperature is 40-50 ℃.

Further, in the preparation method of the solar cell back plate material, the vacuum degree under the vacuum condition in the step 2 is 0.03-0.06 MPa.

Further, in the preparation method of the solar cell back plate material, the stirring speed in the step 2 is 80-100 revolutions per minute.

Further, in the preparation method of the solar cell back plate material, the lubricant in the step 3 is barium stearate.

Further, in the preparation method of the solar cell back sheet material, the antioxidant in step 3 is an antioxidant 1010.

Further, in the preparation method of the solar cell back plate material, the extrusion temperature in the step 3 is 260-270 ℃.

The solar cell backboard material prepared by the preparation method provided by the invention has good mechanical propertiesElectrical property and aging resistance, wherein the tensile strength reaches more than 156MPa, the breakdown voltage strength reaches more than 28KV, and the water vapor transmission rate reaches 1.1g/m²D below, the artificial radiation anti-aging time reaches 2000 hours without abnormality.

The specific implementation mode is as follows: