Silicon dioxide hollow sphere nano composite material, and preparation and application thereof

Abstract

The invention relates to a silicon dioxide hollow sphere nano composite material, and a preparation and application thereof, and relates to the field of nano materials. The preparation method of the silicon dioxide hollow sphere nano composite material comprises the following steps: separately preparing a silicon dioxide hollow sphere suspension and a nano silicon dioxide acidic sol, mixing the silicon dioxide hollow sphere suspension with the nano silicon dioxide acidic sol by stirring, and then carrying out standing to obtain the silicon dioxide hollow sphere nano composite material. A silicon dioxide nano composite coating prepared from the silicon dioxide nano composite material disclosed by the invention has good anti-reflection, permeability-increasing, self-cleaning and anti-fog effects, and meanwhile, the coating also has good mechanical wear resistance and weather resistance, and has good firmness with a substrate. High-temperature calcination or other post-treatment modes arenot needed for preparing the coating, the coating can exert an effect outdoors for a long time, and the application range is wide.

Description

technical field [0001] The invention relates to the field of nanometer materials, in particular to hollow silicon dioxide nanometer composite materials and their preparation and application. Background technique [0002] With the development of science and technology, the research and development of multifunctional self-cleaning glass is very urgent. The so-called multifunctional glass refers to a glass that has both anti-reflection and anti-reflection, self-cleaning (super-hydrophilic anti-fog or super-hydrophobic) properties, and ultra-high mechanical strength and weather resistance. Simultaneously, the preparation method is also required to be simple and the preparation cost is low. [0003] Self-cleaning glass (Self-cleaning glass) refers to the special physical or chemical treatment of ordinary glass, which produces unique physical and chemical properties on the surface, so that the glass can achieve cleaning effect without traditional manual scrubbing methods. Glass....

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Problems solved by technology

However, these methods have their own limitations: method (1) needs to repeatedly spray surface-active agent on a regular basis and seems inconvenient; method (2) causes glass products to have poor abrasion resistance and heat resistance due to the use of organic substances; method ( In 3), it usually takes 7 to 10 minutes to heat and evaporate water droplets, and the timeliness is poor, and additional energy is required, which consumes a lot of energy, so it is not practical; the device of method (4) is more complicated, has many components, and the cost is high (Liu Fu Shengcong, Li Yuping National Scientific and technological journal of building materials - "Glass" 2002, No. 3, 16-19)

Unfortunately the technology uses TiO 2 To improve the hydrophilicity of the surface of the substrate, it must be exposed to ultraviolet light to show good hydrophilicity. It is difficult to achieve this effect in a dark environment, which limits its application. scope

In general, the self-cleaning and anti-fog effects and durability of these current technologies are not ideal

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