CN-122011968-A - Corrosion-resistant POE packaging adhesive film for wet and hot salt mist and preparation method thereof

Abstract

The invention belongs to the technical field of photovoltaic module packaging materials, and in particular relates to an anti-corrosion POE packaging adhesive film for hot and humid salt fog and a preparation method thereof, wherein the raw materials comprise a polyolefin elastomer, an inorganic anti-corrosion auxiliary agent, an organic anti-corrosion auxiliary agent, an antioxidant, an anti-PID auxiliary agent, a silane coupling agent and a free radical crosslinking agent; the inorganic corrosion-resistant auxiliary agent comprises one or more of magnesium oxide, nano magnesium hydroxide, nano calcium hydroxide, nano silicon dioxide, magnesium silicate, calcium stearate, magnesium stearate, zinc stearate and the like, and the organic corrosion-resistant auxiliary agent comprises one or more of organic phosphate, fatty acid ester, polyaspartic acid, epoxy resin, silane coupling agent, organic montmorillonite, polyamide, polyether, polyester, polyquaternary ammonium salt, acrylamide, polyacrylate and the like.

Inventors

• LV QI
• WANG JUNJIE
• LV SONG
• JI ZHICHAO
• HUANG BAOYU
• ZHANG GANG

Assignees

• 常州斯威克光伏新材料有限公司

Dates

Publication Date

20260512

Application Date

20260227

Claims (10)

1. 1. A POE packaging adhesive film is characterized by comprising the following raw materials: Polyolefin elastomer, inorganic anti-corrosion auxiliary agent, organic anti-corrosion auxiliary agent, antioxidant, PID-resistant auxiliary agent, silane coupling agent and free radical crosslinking agent; Wherein the inorganic anti-corrosion auxiliary agent comprises one or more of magnesium oxide, nano magnesium hydroxide, nano calcium hydroxide, magnesium silicate, calcium stearate, magnesium stearate, zinc stearate and the like; The organic anti-corrosion auxiliary agent comprises one or more of organic phosphate, fatty acid ester, polyaspartic acid, epoxy resin, polyamide, polyether, polyester, polyquaternary ammonium salt, acrylamide, polyacrylate and the like; and the POE packaging adhesive film comprises a three-dimensional network structure formed by crosslinking an organic anti-corrosion auxiliary agent and a polyolefin elastomer, and a passivation film formed by complexing the organic anti-corrosion auxiliary agent and the inorganic anti-corrosion auxiliary agent.
2. 2. The POE packaging adhesive film of claim 1, wherein, The organic anti-corrosion auxiliary agent is at least one of polyquaternary ammonium salt, acrylamide, polyaspartic acid and epoxy resin.
3. 3. The POE packaging adhesive film of claim 1, wherein, The organic anti-corrosion auxiliary agent is a composition of polyquaternary ammonium salt and acrylamide.
4. 4. The POE packaging adhesive film of claim 1, wherein, The polyolefin elastomer comprises at least one of ethylene and butene, ethylene and hexene, ethylene and octene copolymer, ethylene and alpha-olefin containing more than 20% by mass; the melt flow rate of the polyolefin elastomer is 3-25 g/10min.
5. 5. The POE packaging adhesive film of claim 1, wherein, The antioxidant comprises any one or a combination of more of tri (2, 4-di-tert-butylphenyl) phosphite, beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, tri [2, 4-di-tert-butylphenyl ] phosphite, tri (4-nonylphenol) phosphite and pentaerythritol diphosphite.
6. 6. The POE packaging adhesive film of claim 1, wherein, The PID-resistant auxiliary agent comprises any one or a combination of a plurality of ethoxylated pentaerythritol acrylic ester, acrylic ester oligomer, functionalized acrylic ester oligomer and modified ethoxylated pentaerythritol tetraacrylate.
7. 7. The POE packaging adhesive film of claim 1, wherein, The silane coupling agent comprises any one or a combination of a plurality of vinyl triethoxysilane, vinyl trimethoxysilane, vinyl t-butylperoxy silane, vinyl triacetoxy silane or vinyl tri (beta-methoxyethoxy) silane.
8. 8. The POE packaging adhesive film of claim 1, wherein, The free radical crosslinking agent comprises any one or a combination of a plurality of triallyl isocyanurate, triallyl cyanurate, trimethylolpropane trimethacrylate or diethylene glycol dimethacrylate.
9. 9. A method for preparing the POE packaging adhesive film as recited in any one of claims 1 to 8, comprising: And mixing the raw materials at a high speed, and carrying out coextrusion casting by a screw extruder at the temperature of 90+/-5 ℃ to obtain the POE packaging adhesive film.
10. 10. A photovoltaic module, characterized in that the POE encapsulating adhesive film according to any one of claims 1 to 8 is used.

Description

Corrosion-resistant POE packaging adhesive film for wet and hot salt mist and preparation method thereof Technical Field The invention belongs to the technical field of photovoltaic module packaging materials, and particularly relates to an anti-corrosion POE packaging adhesive film for hot and humid salt fog and a preparation method thereof. Background The photovoltaic adhesive film is used as a key packaging material of the photovoltaic module, not only has excellent cohesiveness, sealing property and optical performance, but also has stable corrosion resistance in long-term outdoor use so as to protect the battery piece from corrosion of grid lines caused by corrosion of environmental factors (such as water vapor, oxygen, ultraviolet rays, temperature change and the like) and blackening of the battery. At present, the corrosion resistance of the photovoltaic adhesive film is mainly realized by introducing organic corrosion resistance auxiliary agents and inorganic corrosion resistance particles. Organic corrosion inhibitors (e.g., polyetheramines, organosilanes, etc.) typically react with the cell surface to form a dense protective film that reduces the permeation rate of water vapor and oxygen. However, the organic auxiliary agent is easy to be chemically degraded in a long-term high-temperature and high-humidity environment, so that the corrosion resistance gradually fails, and the single organic auxiliary agent is difficult to simultaneously take the effects of physical barrier and chemical protection into consideration, so that the improvement of the overall performance of the adhesive film is limited. On the other hand, inorganic anti-corrosion particles (e.g., nano magnesium hydroxide, nano silicon dioxide, etc.) have also been widely studied for improving the anti-corrosion ability of photovoltaic adhesive films due to their excellent physical barrier properties. However, the surface modification effect of inorganic particles is limited, the interface bonding strength is insufficient, the particles are easy to aggregate in a matrix, the uniformity and stability of a material are affected, the construction of a dynamic crosslinking system is imperfect, the problems of insufficient chemical resistance and weather resistance of a glue film can still occur in the long-term use process, and part of inorganic particles can migrate or decompose under the high temperature or illumination condition, so that the corrosion resistance can be gradually reduced with time. Based on the analysis, in the prior art, no matter the organic anti-corrosion auxiliary agent or the inorganic anti-corrosion particle is independently used, comprehensive and stable anti-corrosion performance is difficult to realize under complex environmental conditions (such as high temperature and high humidity, strong ultraviolet irradiation, temperature cycling change and the like). By compounding the organic anti-corrosion auxiliary agent and the inorganic anti-corrosion particles, the synergistic effect of the organic anti-corrosion auxiliary agent and the inorganic anti-corrosion particles can be fully exerted, so that the comprehensive performance of the photovoltaic adhesive film is obviously improved. However, in practical application, the problem of poor long-term stability still exists, and the organic auxiliary agent and the inorganic auxiliary agent can lose the combination effect in the wet and hot salt fog and finally cause the ageing of the adhesive film. Therefore, how to overcome the defect of insufficient corrosion resistance of the organic corrosion-resistant auxiliary agent and the inorganic corrosion-resistant auxiliary agent in a wet and hot salt fog environment becomes a key technical problem to be solved in the field of the current photovoltaic packaging materials. It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and therefore the above description is not to be construed as constituting prior art information. Disclosure of Invention The embodiment of the disclosure at least provides an anti-corrosion POE packaging adhesive film for hot and humid salt fog and a preparation method thereof. According to the first aspect, the embodiment of the disclosure provides a POE packaging adhesive film, which comprises polyolefin elastomer, inorganic anti-corrosion auxiliary agent, organic anti-corrosion auxiliary agent, antioxidant, PID (proportion integration differentiation) auxiliary agent, silane coupling agent and free radical crosslinking agent, wherein the inorganic anti-corrosion auxiliary agent comprises one or more of magnesium oxide, nano magnesium hydroxide, nano calcium hydroxide, magnesium silicate, calcium stearate, magnesium stearate, zinc stearate and the like, the organic anti-corrosion auxiliary agent comprises one or more of organic phosphate, fatty acid ester, polyaspartic acid, epoxy resin, polyamide, polyeth