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EP-4737526-A1 - STRONTIUM TITANATE NANOMATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF

EP4737526A1EP 4737526 A1EP4737526 A1EP 4737526A1EP-4737526-A1

Abstract

A strontium titanate nano-micro material, a preparation method therefor and a use thereof. The raw materials for preparing the strontium titanate nanomaterial comprise a base material and a dispersant; the mass of the dispersant is 0.05-0.2% of the mass of the base material; in terms of mass fraction, the raw materials for preparing the base material comprise 50-90 parts of a powdered resin, 10-50 parts of a curing agent, 0-20 parts of an antioxidant, 0.05-0.2 parts of a catalyst, 0-10 parts of a surface conditioner, 0-20 parts of a light stabilizer, and 0.05-5 parts of a strontium titanate nano-additive, the strontium titanate nano-additive being a mixture of octadecahedral strontium titanate, hexahedral strontium titanate and irregularly-shaped strontium titanate in a mass ratio of 3-4: 4-6: 1-2; the strontium titanate nanomaterial has excellent weathering resistance.

Inventors

  • YANG, Yujuan
  • GUO, JINYAN
  • ZHANG, Jiansen
  • JING, Liang
  • SHAO, BO
  • ZHANG, XIAOCHEN

Assignees

  • Newmat (Beijing) Environmental Materials Technology Co., Ltd
  • Cangzhou Newmat Aadvanced Materials Technology Co., Ltd

Dates

Publication Date
20260506
Application Date
20231211

Claims (16)

  1. A strontium titanate nano-micro material, wherein raw materials for preparing the strontium titanate nano-micro material comprise a base material and a dispersant, the amount of the dispersant being 0.05 wt% to 0.2 wt%, based on the weight of the base material; and the base material comprises the following raw materials in parts by weight: 50-90 parts of a powder resin; 10-50 parts of a curing agent; 0-20 parts of an antioxidant; 0.05-0.2 parts of a catalyst; 0-10 parts of a surface conditioner; 0-20 parts of a light stabilizer; and 0.05-5 parts of a strontium titanate nano-additive, which is a mixture of octadecahedral strontium titanate, hexahedral strontium titanate, and irregularly-shaped strontium titanate, wherein the octadecahedral strontium titanate, hexahedral strontium titanate, and irregularly-shaped strontium titanate are present in a weight ratio of 3-4: 4-6: 1-2.
  2. The strontium titanate nano-micro material according to claim 1, characterized in that the strontium titanate nano-additive has a particle size of 50-300 nm.
  3. The strontium titanate nano-micro material according to claim 2, characterized in that the octadecahedral strontium titanate has a particle size of 100-200 nm; the hexahedral strontium titanate has a particle size of 100-200 nm; and the irregularly-shaped strontium titanate has a particle size of 50-100 nm.
  4. The strontium titanate nano-micro material according to claim 1, characterized in that the powder resin comprises one or more selected from the group consisting of acrylic resin, polyurethane resin, and polyester resin.
  5. The strontium titanate nano-micro material according to claim 4, characterized in that the acrylic resin is an epoxy acrylic resin.
  6. The strontium titanate nano-micro material according to claim 1, characterized in that the curing agent comprises one or more selected from the group consisting of dodecanedioic acid, triglycidyl isocyanurate, and isocyanate.
  7. The strontium titanate nano-micro material according to claim 1, characterized in that the antioxidant comprises one or more selected from the group consisting of octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, benzofuranone derivatives, and thioester antioxidants.
  8. The strontium titanate nano-micro material according to claim 1, characterized in that the catalyst comprises tetrabutylammonium bromide, dibutyltin dilaurate, or 2-propylimidazole.
  9. The strontium titanate nano-micro material according to claim 1, characterized in that the surface conditioner comprises benzoin.
  10. The strontium titanate nano-micro material according to claim 1, characterized in that the light stabilizer comprises triazine light stabilizers or hindered amine light stabilizers.
  11. The strontium titanate nano-micro material according to any one of claims 1-10, characterized in that the base material has a particle size of 30-150 µm.
  12. The strontium titanate nano-micro material according to claim 1, characterized in that the dispersant comprises one or more selected from the group consisting of alumina, fumed silica, and glass microbeads.
  13. The strontium titanate nano-micro material according to claim 1 or 12, characterized in that the dispersant has a particle size of 2-8 µm.
  14. A method for preparing the strontium titanate nano-micro material according to any one of claims 1-13, comprising the following steps: mixing the raw materials of the base material, followed sequentially by melt extrusion, cooling, pulverization, and sieving to obtain the base material; and mixing the base material with the dispersant to obtain the strontium titanate nano-micro material; or mixing the raw materials of the base material with the dispersant, followed sequentially by melt extrusion, cooling, pulverization, and sieving to obtain the strontium titanate nano-micro material.
  15. The method according to claim 14, characterized in that the melt extrusion is performed at a temperature of 90-130°C.
  16. Use of the strontium titanate nano-micro material according to any one of claims 1-13 or the strontium titanate nano-micro material prepared by the method according to claim 14 or 15 in photovoltaic module encapsulation materials.

Description

The present application claims priority to Chinese Patent Application No. CN202310776712.1, entitled "Strontium Titanate Nano-Micro Material, Preparation Method Therefor and Use Thereof" filed with the China National Intellectual Property Administration on June 29, 2023, the entirety of which is hereby incorporated by reference. Technical Field The present invention relates to the technical field of functional materials, and in particular to a strontium titanate nano-micro material, a preparation method therefor and use thereof. Background Art Solar energy is a clean energy source. Solar photovoltaic power generation directly converts light energy into electrical energy by using solar cells. A single solar cell cannot be used directly as a power source; it is necessary to connect a number of single solar cells in series and in parallel, and tightly encapsulated to form a photovoltaic module. A photovoltaic module, also known as a solar panel, is the core component of a solar power generation system. Its working principle is to convert solar energy into electrical energy based on the photovoltaic effect. Traditional photovoltaic applications have been dominated by centralized photovoltaic systems, which are predominantly ground-mounted. With continuous advancements in photovoltaic technology and diversification of application scenarios, the proportion of distributed photovoltaics has increased rapidly. Distributed photovoltaic power generation refers to photovoltaic power generation facilities that are installed near user sites, and operate in a manner characterized by self-generation and self-consumption by users, excess electricity fed to the grid, and balancing adjustment in the power distribution system. Distributed photovoltaic power generation follows the principles of site-specific adaptation, clean and efficient operation, decentralized layout, and nearby utilization, making full use of local solar resources to replace and reduce fossil energy consumption. Conventional photovoltaic modules typically use tempered glass as the encapsulation material for encapsulating solar cells, which results in such problems as high weight, limited application scenarios, difficult installation, and lack of aesthetic appeal. To address these issues, lightweight photovoltaic modules have emerged, meeting the demands of the distributed photovoltaic market. Lightweight photovoltaic modules typically use encapsulation materials made from acrylic powder coatings. These acrylic powder coatings mainly comprise acrylic resin, curing agents, and some conventional additives, and suffer from insufficient weathering resistance. Summary of the Invention The object of the present invention is to provide a strontium titanate nano-micro material, a preparation method therefor, and use thereof. The strontium titanate nano-micro material provided by the present invention has excellent weathering resistance. In order to achieve the above object, the present invention provides the following technical solutions: The present invention provides a strontium titanate nano-micro material, wherein raw materials for preparing the strontium titanate nano-micro material comprise a base material and a dispersant, the amount of the dispersant being 0.05 wt% to 0.2 wt%, based on the weight of the base material; andthe base material comprises the following raw materials in parts by weight: 50-90 parts of a powder resin;10-50 parts of a curing agent;0-20 parts of an antioxidant;0.05-0.2 parts of a catalyst;0-10 parts of a surface conditioner;0-20 parts of a light stabilizer;0.05-5 parts of a strontium titanate nano-additive, which is a mixture of octadecahedral strontium titanate, hexahedral strontium titanate, and irregularly-shaped strontium titanate, wherein the octadecahedral strontium titanate, hexahedral strontium titanate, and irregularly-shaped strontium titanate are present in a weight ratio of 3-4: 4-6: 1-2. Preferably, the strontium titanate nano-additive has a particle size of 50-300 nm. Preferably, the octadecahedral strontium titanate has a particle size of 100-200 nm; the hexahedral strontium titanate has a particle size of 100-200 nm; and the irregularly-shaped strontium titanate has a particle size of 50-100 nm. Preferably, the powdered resin comprises one or more selected from the group consisting of acrylic resin, polyurethane resin, and polyester resin. Preferably, the acrylic resin is an epoxy acrylic resin. Preferably, the curing agent comprises one or more selected from the group consisting of dodecanedioic acid, triglycidyl isocyanurate, and isocyanate. Preferably, the antioxidant comprises one or more selected from the group consisting of octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, benzofuranone derivatives, and thioester antioxidants. Preferably, the catalyst comprises tetrabutylammonium bromide, dibutyltin dilaurate, or 2-propylimidazole. Preferably, the surface conditioner comprises benzoin. Preferably, the li