Modified wet film, production method of modified wet film and application of modified wet film in production of heat exchange device of air conditioner external unit

Abstract

The invention provides a modified wet film. The modified wet film comprises the following raw materials: carboxymethyl cellulose, teflon, graphene oxide, a silane coupling agent KH550, oxide ceramics,a Li-containing metal salt, CaCl2, polyvinylpyrrolidone, polyvinyl alcohol, acetic acid, ethyl alcohol and water. The produced modified wet film has good self-cleaning performance after being used asthe heat exchange device of the air conditioner external unit, can guarantee cleanness of air which enters a room, has the advantages of non-toxicity, resistance to acids and alkalies, resistance tomould, flame retardation and the like, is a good use material of the heat exchange device of the external unit, and has wide application prospects.

Description

technical field [0001] The invention relates to the technical field of wet films, in particular to a modified wet film, a preparation method thereof, and the application of a heat exchange device for an air conditioner external unit. Background technique [0002] With the improvement of people's requirements for environmental comfort, indoor air quality has gradually been paid attention to, and the requirements for air conditioners are not only limited to temperature control, but also require the air conditioning system to create a clean and healthy indoor living environment for human beings. Many areas in my country are in the stage of construction and reconstruction. The construction causes outdoor dust to fly. In addition, the speed of cars on the road causes dust to fly. The particulate matter in the air is seriously exceeding the standard. Particulate matter has an irritating effect on the human respiratory tract, especially when tiny particles are inhaled into the huma...

AI Technical Summary

Problems solved by technology

[0006] The traditional preparation method of the traditional asymmetric moisture-permeable membrane is to pour the uniform casting solution on a clean glass plate and cast it evenly, then immerse the glass plate in clean water to form a film, and take out the film after the film is automatically peeled off from the glass plate Immerse in another clean water to continue soaking to remove excess solvent, take out the membrane and dry it into a porous support membrane for use, pour the dense cortex solution evenly on the porous support membrane to form an ultra-thin dense cortex, put it in a vacuum drying oven and dry it into a porous support membrane. An asymmetric composite moisture-permeable membrane with a two-layer structure. The mechanical properties of the moisture-permeable membrane prepared under this preparation process are not high, and the membrane is easy to break

In order to improve the mechanical properties of the membrane, there is a technology that can spread a piece of non-woven fabric of a suitable size on the glass plate when pouring the casting liquid. Using the non-woven fabric can greatly increase the mechanical properties of the composite membrane, and at the same time, different scales can be used. The film scraper replaces casting to control the thickness of the film, so that the thickness of the composite film can be controlled, but this preparation method needs to construct the two-layer structure of the film (porous support layer and dense skin layer) in two steps, and the preparation process is relatively complicated. Industrialization The production equipment is more complicated and the cost is higher

Although PTFE microporous membrane has excellent waterproof and moisture-permeable performance, it is monopolized by foreign technology, equipment and raw materials are difficult to stabilize, resulting in unstable product quality and poor mechanical properties. Due to the smoothness and non-stickiness of the polymer, its The post-composite process is difficult, which limits its application field

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