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Modified PET base material for solar cell backboard and preparation method of modified PET base material

A solar cell and modified technology, applied in the field of solar cells, can solve the problems of poor light resistance and light absorption properties of ordinary titanium dioxide, which are unfavorable for long-term use of PET materials, the decline in moisture and heat resistance of PET solar back sheets, and the unfavorable surface hydrophobicity of PET substrates. , to achieve excellent ultraviolet light absorption performance, good light absorption performance, and the effect of improving light resistance and anti-aging performance

Active Publication Date: 2021-05-04
浙江中聚材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the formula of this invention patent is complex and the process is cumbersome, which is not suitable for practical production, and the addition of hydrophilic titanium dioxide and high surface energy are not conducive to the improvement of the surface hydrophobicity of PET substrates, which may easily cause PET solar backsheets The moisture and heat resistance performance of ordinary titanium dioxide is reduced, and the light resistance and light absorption performance of ordinary titanium dioxide are poor, which is not conducive to the long-term use of PET materials under sunlight

Method used

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Examples

Experimental program
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preparation example Construction

[0045] In some preferred embodiments, the preparation method steps of the modified titanium dioxide include the following steps: (1) dissolving succinic anhydride in DMF solution, and adding a certain amount of (3-aminopropyl) triethoxy Base silane, heated and stirred at a water bath temperature of 60-80°C for 1-2 hours; (2) After that, the DMF solution containing titanium dioxide was added dropwise to the reaction solution, and the reaction was continued for 2-3 hours to obtain pretreated titanium dioxide particles; ( 3) Mix the pretreated titanium dioxide particles with 2-methylimidazole and zinc nitrate and add ethanol solvent, conduct ultrasonic polymerization in a 300-500W water-bath ultrasonic device for 3-3.5 hours, wash and dry the obtained product, and obtain the modified Titanium dioxide particles.

[0046] The second aspect of the present invention provides a method for preparing the above-mentioned modified PET substrate for solar battery back sheets, the steps inc...

Embodiment 1

[0062] Embodiment 1 provides a kind of modified PET base material for solar cell back sheet, raw material comprises following parts by weight: 31 parts of ethylene glycol, 83 parts of terephthalic acid, 5 parts of modified titanium dioxide (average particle diameter 400nm), ethyl alcohol 0.5 part of antimony glycol, 0.5 part of triphenyl phosphate.

[0063] In this example, the modified titanium dioxide has also undergone amorphous silica coating pretreatment, and the steps include the following steps (in parts by weight): (1) Mix and stir 2 parts of modified titanium dioxide and 5 parts of ammonia water, and then add Stir and mix evenly among 50 parts of ethanol; (2) Configure 5 parts of tetraethyl orthosilicate and 30 parts of ethanol as a drop solution, add dropwise to the mixed solution in step (1) while stirring, dropwise react The time is 45 minutes; (3) After the dropwise addition is completed, the stirring reaction is continued for 3 hours. After the reaction is comple...

Embodiment 2

[0069] Embodiment 2 provides a kind of modified PET base material for solar battery back sheet, raw material comprises following weight parts: ethylene glycol 40 parts, terephthalic acid 90 parts, modified titanium dioxide (average particle diameter 400nm) 5 parts, ethyl alcohol 0.5 part of antimony glycol, 0.5 part of triphenyl phosphate.

[0070] In this example, the modified titanium dioxide has also undergone amorphous silica coating pretreatment, and the steps include the following steps (in parts by weight): (1) Mix and stir 2 parts of modified titanium dioxide and 5 parts of ammonia water, and then add Stir and mix evenly among 50 parts of ethanol; (2) Configure 5 parts of tetraethyl orthosilicate and 30 parts of ethanol as a drop solution, add dropwise to the mixed solution in step (1) while stirring, dropwise react The time is 45 minutes; (3) After the dropwise addition is completed, the stirring reaction is continued for 3 hours. After the reaction is completed, the ...

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Abstract

The invention discloses a modified PET base material for a solar cell backboard. The modified PET base material comprises the following raw materials in parts by weight: 30-50 parts of ethylene glycol, 80-100 parts of terephthalic acid, 1-7 parts of solid filler, 0.1-1 part of a catalyst and 0.1-1 part of a stabilizer. Modified titanium dioxide is added into the PET base material as a solid filler, so that the tensile strength, light absorption performance and hydrophobicity of PET are effectively improved, the mechanical property, light resistance and heat and humidity resistance of the PET solar backboard are enhanced, and the material is suitable for being popularized and used in the field of solar cell backboards and has a wide development prospect.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a modified PET base material for a solar cell back sheet and a preparation method thereof. Background technique [0002] Solar battery backsheets are mainly divided into two categories: fluorine-containing backsheets and fluorine-free backsheets. Among them, the fluorine-containing backsheet is divided into two types: double-sided fluorine-containing (such as TPT) and single-sided fluorine-containing (such as TPE); while the fluorine-free backsheet is mostly made by bonding multiple layers of PET with an adhesive. At present, the service requirement of commercial crystalline silicon solar cell modules is 25 years, and the backsheet, as a photovoltaic packaging material directly in contact with the external environment on a large area, should have excellent long-term aging resistance (damp heat, dry heat, ultraviolet), electrical resistance Insulation, water vapor barrier and other pro...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K9/02C08K3/22C08K9/06C08K9/04C08G63/78H01L31/048H01L31/049
CPCC08K9/02C08K3/22C08K9/06C08K9/04C08G63/78H01L31/0481H01L31/049C08K2201/011C08K2003/2241C08L67/02Y02E10/50
Inventor 蔡书义焦华
Owner 浙江中聚材料有限公司