Nano grain size yellow tungsten oxide may be applied for preparing heat insulation agricultural film, which has excellent ultraviolet blocking effect and infrared absorption effect, and does not affect the transmission of visible light. This is because the yellow tungsten oxide nanoparticles can form an infrared light absorbing layer. This layer has a characteristic that the diffuse reflectance of light in the visible light region and the light absorption rate in the infrared region are high.
As you may have known, the solar light reaching the earth surface is generally in the wavelength region of about 290-2100nm, and the light in the visible wavelength region of about 380-780nm is the light necessary for plant growth. Therefore, by reflecting the visible light and efficiently selecting only the near-infrared light of about 780-2100nm, the light necessary for plant growth is reflected to the plant side, and the infrared light absorbed is converted into heat to warm the soil. But, it does not raise the temperature inside the greenhouse. According to experts' research, agricultural films of yellow tungsten oxide nanoparticles can bring this ding.
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