Method for preparing sol for stabilizing properties of anti-reflection film of solar glass

Abstract

The invention relates to the preparation of sol and aims to provide a method for preparing sol for stabilizing the properties of an anti-reflection film of solar glass. The method comprises the following steps of: adding orthosilicic acid ester into a lower aliphatic alcohol solvent with stirring, and mixing uniformly; adding water, adding a pore-forming agent, namely triton X-100, mixing, adding organic acid or inorganic acid to regulate the pH value of a solution to be 2 to 3, and reacting for 4h at the temperature of 60 DEG C; adding alkyl siloxane, mixing uniformly, and continuing to react for 2h at the temperature of 60 DEG C to obtain SiO2 polymer sol for the anti-reflection film; and adding a pH value stabilizer with the pH value of between 6.8 and 7.8, and mixing uniformly to obtain a product. By the method, the subsequent reaction speed of the system is greatly reduced, and the stability of the system is improved and the preservation time of the system is prolonged. Meanwhile, during the use of film sol, volatile weak acid in a buffer solution is volatilized and weak acid salt of the volatile weak acid is remained through the curing and heating of a film in the post-heat treatment process; and the film system becomes alkaline and is easier to cure at this time.

Description

technical field [0001] The invention relates to sol preparation, in particular to a method for preparing a sol with stable properties used for solar glass anti-reflection film. Background technique [0002] With the wide application of photovoltaic power generation, solar encapsulation glass is widely used. The antireflection film of solar encapsulation glass is an optical film coated on the surface of solar encapsulation glass to increase the transmittance of the glass. At present, anti-reflective glass for solar energy encapsulation is mainly obtained by applying coating film sol on the glass surface by roller coating or spray coating and then heat-treating at a certain temperature. From the anti-reflection principle of the film, it can be known that for a single-layer anti-reflection and anti-reflection anti-reflection coating, the highest anti-reflection performance (that is, the best anti-reflection performance) must be achieved in the 380-1100nm visible light-near-infr...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the existing acid-catalyzed SiO 2 The problem of the poor physical properties and molecular structure stability of the sol at room temperature starts from adjusting the pH value, and through the prepared SiO 2 The method of adding a certain pH value to the sol, which is composed of a volatile weak acid and a weak acid base alkali metal salt, adjusts the pH value of the reaction product sol to neutral, thereby greatly reducing the reaction speed of the sol-gel process. To achieve the purpose of stabilizing the properties and structural energy of the sol

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