Nano tungsten oxide may be used for the preparation of heat insulation agricultural thin film. This is mainly because the tungsten oxide nanoparticles have an excellent ultraviolet blocking effect. In other words, these nanoparticles can well block ultraviolet rays from the outside which are excessive for plants in the greenhouse. Therefore, an appropriate amount of long ultraviolet rays that are irradiated into the greenhouse can stimulate the growth of plants, increase crop yield, and promote the synthesis of proteins, sugars, and acids. Moreover, these long ultraviolet rays can improve the germination of the seeds. In addition, an appropriate amount of short ultraviolet rays can inhibit the growth of plants, prevent plant growth, and also have a disinfecting effect, which can reduce plant diseases.
Certainly, thanks to the excellent properties of the tungsten oxide nanoparticles, the properties of the obtained agricultural film such as toughness, strength, wind resistance and heat insulation are greatly improved compared with the common agricultural film.
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