A kind of radiation self-cooling functional fiber fabric and preparation method thereof

Abstract

The invention relates to a radiation self-cooling functional fiber fabric and a preparation method thereof, which is characterized in that the surface of the functional fiber fabric is coated with a high-reflection aluminum-silver layer and an 8-14 μm infrared strong selective absorption radiation coating in sequence; 8 ~14μm infrared strong selective absorption radiation coating is composed of active nano functional composition and fluoropolymer resin solution, wherein said active nano functional composition is composed of nano silicon dioxide, rare earth silicate compound and molybdate compound According to the mass ratio of 1:(0.5~2):(0.5~2), it is mixed and modified by silane coupling agent; the solid component mass of fluoropolymer resin solution accounts for 8~14μm infrared strong selective absorption radiation coating 10% to 80% of the layer quality. The functional fiber fabric provided by the invention can exert an efficient radiation self-cooling function under sunlight and no light environment, and can be widely used in the fields of buildings, high-power equipment outer layers or in the manufacture of self-cooling tents and functional clothing.

Description

technical field [0001] The invention relates to a radiation self-cooling functional fiber fabric and a preparation method thereof, belonging to the technical field of functional composite fiber fabric and heat radiation. Background technique [0002] With the continuous development of the global economy, the energy demand faced by human society is increasing. The development of new energy-saving materials and technologies to minimize energy consumption and reduce environmental load has important economic and social value. Radiative self-cooling is a physical mechanism in which ground objects transfer heat to outer space through infrared atmospheric windows, thereby reducing their own temperature. Under the condition of sunlight, the reduction of the surface temperature of the object is mainly related to several aspects: first, the absorption of sunlight energy requires the surface of the object to have as high reflection as possible for 0.3-2.5μm sunlight; second, The absor...

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Problems solved by technology

[0003] Judging from the existing public reports, under the condition of no sunlight, the radiation cooling mechanism can be used to achieve self-cooling of objects, but the radiation self-cooling performance of radiation cooling materials under daylight conditions has not yet met the practical requirements.

The preparation of existing radiation self-cooling materials mainly includes the following methods: (1) Using nanometer photolithography and plasma deposition technology to construct a radiation cooler with a nano-micro-scale structure. Although the self-cooling performance of the radiation cooler is good, its manufacturing The process is complicated, difficult, and demanding, and it is difficult to produce on a large scale and at low cost

In addition, there are deficiencies such as low structural strength and easy damage; (2) uniformly mix inorganic functional substances such as anatase titanium dioxide micropowder and glass microspheres with polymer resin, and compound a certain thickness on one side of the surface High-reflective metal aluminum or silver film is used to make radiation self-cooling device, but because the selected inorganic functional materials such as titanium dioxide micropowder and glass microspheres have weak selective absorption radiation performance in the infrared spectrum region, it is difficult to make the radiation self-cooling device. Obtain a more ideal radiation self-cooling effect

[0004] At present, the common radiation self-cooling materials are mostly radiation self-cooling coatings, which have high requirements for the coating substrate, and some objects with rough surfaces and low reflectivity are difficult to effectively apply

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