A kind of multifunctional film based on micro-nano composite structure and coating and its preparation method and application

Abstract

The invention discloses a multifunctional film based on a micro-nano composite structure and a coating and a preparation method and application of the multifunctional film. The multifunctional film comprises a flexible film base material layer; a micron-scale structure layer which is attached to the flexible film base material layer and comprises a plurality of micron-scale structures arranged inan array, wherein the diameter of each micron-scale structure is 0.5-500 [mu]m, the height of 1-1000 [mu]m, and the interval between two adjacent micron-sized structures is 10-1,000 [mu]m. One end ofeach micron-scale structure is attached to the flexible thin film base material, the opposite other end of each micron-scale structure is provided with a first-stage nano structure, and the diameter of each first-stage nano structure is 100-1,000 nm. One end, far away from the micron-sized structure, of the first-stage nano structure is provided with a second-stage nano structure, and the diameterof the second-stage nano structure is 1nm-380nm. The multifunctional film also comprises a hydrophobic coating layer which is attached to the exposed surfaces of the flexible film substrate layer, the micron-sized structure layer, the first-stage nano structure and the second-stage nano structure. The multifunctional thin film is good in large-area consistency, has super-hydrophobic performance,anti-reflection performance and self-cleaning performance, and can be applied to the surface of a thin-film solar cell.

Description

technical field [0001] The invention belongs to the technical field of preparation of multifunctional materials, and in particular relates to a multifunctional thin film based on a micro-nano composite structure and coating, a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the depletion of coal, oil, natural gas and other energy sources and the increasing environmental pollution, people urgently need to find clean and renewable new energy sources. Thin-film solar cells are new photovoltaic devices to alleviate the energy crisis. Thin-film solar cells are often used in outdoor environments. Water droplets and particulate po...

AI Technical Summary

Problems solved by technology

Thin-film solar cells are often used in outdoor environments. Water droplets and particulate pollutants attached to the surface will seriously weaken the photoelectric conversion efficiency of the device

[0004] The functional surfaces reported so far have problems such as single function, cumbersome manufacturing process, and high cost.

Chinese patent CN 109483058 A discloses a method for rapid and large-area remote preparation of superhydrophobic antireflection structures on irregular metal curved surfaces. The method of combining femtosecond laser and chemical fluorination treatment is used to prepare superhydrophobic antireflection surfaces. The inventor It was found that the femtosecond laser processing efficiency of this patent is low and cannot be processed continuously. In addition, the super-hydrophobic anti-reflective surface prepared by this patent does not involve self-cleaning function

Chinese patent CN 109468648 A discloses a large-scale preparation method for anti-frosting surfaces of aluminum or aluminum alloys. The inventors found that the patent uses chemical corrosion to prepare micron-scale structures, and grows nano-scale rough structures by hydrothermal synthesis. Chemical corrosion and hydrothermal synthesis are random, and the consistency on a large area cannot be guaranteed, and the preparation efficiency is low, and the prepared anti-frosting surface only has super-hydrophobic properties

Chinese patent CN 109530188 A discloses a method for preparing the surface of a self-cleaning aluminum-magnesium alloy. The surface of the magnesium-aluminum alloy is pretreated and cleaned, micro-arc oxidized, cleaned and dried, and then the configured titanium dioxide self-cleaning sol is coated on the magnesium alloy surface. Aluminum alloy surface, corresponding heat treatment on the magnesium aluminum alloy surface to obtain a self-cleaning magnesium aluminum alloy surface, the inventor found that the patent has the disadvantages of cumbersome process and the prepared self-cleaning aluminum-magnesium alloy surface only has self-cleaning function, etc.

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