A superhydrophobic modification method for greenhouse films

Abstract

The invention discloses a superhydrophobic modification method for greenhouse films. The PE film is placed in an inductively coupled plasma etcher; the upper surface of the PE film is etched for a period of time by an inductively coupled plasma etcher, so that a nano-textured structure is formed on the upper surface of the PE film; The plasma etching instrument deposits the upper surface of the PE film for a period of time, so that a layer of fluorocarbon layer is deposited on the surface of the nano-textured structure of the PE film, and the modification is completed and taken out. The invention uses a two-step treatment method of inductively coupled plasma etching to build a nano-texture structure on the surface of the film and cover a layer of low surface energy material, endowing the film with excellent super-hydrophobic properties and self-cleaning ability.

Description

technical field [0001] The invention relates to a film modification preparation method of superhydrophobic modification technology, in particular to a superhydrophobic modification method for greenhouse films. Background technique [0002] A greenhouse is a closed structure that uses solar radiation to create a microclimate suitable for plant growth, and is one of the typical forms of agricultural production. The components involved in a greenhouse usually include covering material, framework, cultivation facilities and technical equipment required to control the microclimate inside the greenhouse. Among them, the covering material is the most important component of the greenhouse, and plastic films are generally the most commonly used, especially polyethylene (PE) films are the most widely used. The service life of these plastic films is generally about one year. During use, dust and grass clippings in the environment often adhere to the surface of the film, and due to the...

AI Technical Summary

Problems solved by technology

[0004] There are two reasons why these plastic films are discarded. One is that they are severely damaged during daily use, and the other is that the light transmittance decreases significantly after long-term use, which is not conducive to the growth and development of plants in the greenhouse.

The damage of the film is caused by improper use and environmental factors (such as violent wind and rain), which is usually unavoidable. However, the existing film has poor hydrophobicity. After long-term use, it often becomes gray, which is not conducive to plant growth and has to be replaced.

Although it is impossible to artificially intervene in natural factors without destroying the film, more attention can be paid during use so as not to cause additional damage to it. The existing technology lacks some technical means to modify the film to increase their hydrophobicity.

[0005] Existing superhydrophobic modification technologies include wax curing, template method, physical / chemical vapor deposition method, etching method, photolithography, etc. These technologies either require expensive silicon molds to manufacture nanostructures, or require high temperature, vacuum, etc. and other conditions, and the manufacturing process is relatively complicated

They are neither suitable for large-scale practical applications nor for plastic films

Images