Application of hydrophobic heat insulating and cooling film

Abstract

The invention provides application of a hydrophobic heat insulating and cooling film. The hydrophobic heat insulating and cooling film covers the surface of a matrix or is arranged above the surface of the matrix or is hung on the side, facing the light, of the interior of the matrix to lower the temperature of the side of the shady face of the matrix or the interior of the matrix; and the hydrophobic heat insulating and cooling film is a polymer porous film, the porosity is 30-90%, a spongy structure is arranged in the hydrophobic heat insulating and cooling film, holes and hole diameters arein bimodal distribution, and the width distributions are 0.2-0.6 microns and 1-5 microns. The hydrophobic heat insulating and cooling film is a flexible thin film material with excellent hydrophobicity, thermal insulating effect and cooling effect, shows excellent flexibility, can be bent and curled at will, can effectively lower the temperature of the side of the shady face of the matrix or theinterior of the matrix when being used as a thermal insulating and cooling film on the surface of the matrix with different characters and shapes and has extremely high using value and excellent application prospect.

Description

technical field [0001] The invention belongs to the technical field of heat insulation materials and relates to the application of a hydrophobic heat insulation and cooling film. Background technique [0002] Under the sun exposure, in order to achieve the purpose of heat insulation and cooling without energy consumption, the surface of the substrate (house, car, tent, pipe, box, sunshade or other equipment) can be covered with heat insulation and cooling film, or heat insulation and cooling can be set above the surface of the substrate. film, or hang a heat-insulating and cooling film on the inner side of the substrate, where houses include residences / office buildings / shopping malls / libraries, factories / warehouses, oil depots / grain depots, glass houses, pet houses, iron houses, mobile board houses Vehicles include rail trains, automobiles (passenger cars, passenger cars, semi-trailer tractors, trains, cold chain vehicles), etc. Tents include camping tents, temporary command...

AI Technical Summary

Problems solved by technology

However, almost all similar products on the market can only partially block the entry of sunlight energy, but cannot achieve efficient internal heat dissipation, such as aluminum foil

Existing heat insulation film products often use aluminum foil to reflect sunlight. Although aluminum foil can reflect infrared heat, it cannot radiate infrared heat. The heat enters the interior; the bonding strength between the aluminum foil and the substrate is poor, and the corrosion resistance and weather resistance are poor. The existence of the above defects limits the service life and heat insulation effect of existing heat insulation film products

However, there have been no reports on the large-scale application of polymer porous membranes in the field of heat insulation and cooling.

In addition, the existing polymer porous membrane and its preparation method still have the following problems: the pore size of the existing polymer porous membrane is usually smaller than the submicron level. Although this kind of porous membrane has a strong infrared radiation function due to its composition, it cannot Efficiently prevent the incidence of sunlight, and the contribution of this part of energy to the temperature rise of the substrate is not negligible, so it is difficult to achieve the function of heat insulation and cooling; the existing methods of preparing polymer porous membranes are mainly scrape coating and spraying methods, of which scrape The film area obtained by the coating method is limited and has high requirements on the flatness of the substrate. It is difficult to prepare a film material with a large area and high flatness. Therefore, the scraping method is not suitable for large-area and fast preparation of films with specific holes; When the polymer porous membrane is prepared by the method, the pore morphology of the film is easily affected by the preparation parameters, such as the concentration of the precursor solution, the spraying rate, the spraying height and other parameters are the key factors affecting the membrane pore structure, which makes the existing spraying method It is difficult to prepare a polymer porous membrane that can efficiently reflect full-band sunlight (330nm-2.5μm)

In fact, the existing spraying method for preparing polymer porous membranes still has problems such as low efficiency, high energy consumption, and difficult operation, which also greatly limits the wide application of spraying methods in preparing polymer porous membranes.

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