Radiative cooling device using at least one reinforcement layer for radiative cooling

A radiative cooling device, comprising:

• a radiative cooling layer formed of a first mixture prepared by mixing at least one particle of pores, ceramic particles and polymer particles with a binder, formed on a substrate, configured to absorb and emit long-wavelength infrared rays in a range of 8 μm to 13 μm based on the first mixture to achieve radiative cooling emissivity, and configured to scatter and reflect incident sunlight in a range of 0.3 μm to 2.5 μm to achieve radiative cooling reflectivity;
• a first reinforcement layer formed on the radiative cooling layer, formed of a second mixture of ceramic particles and a binder, configured to prevent mass loss due to external exposure or friction based on the second mixture to increase the durability of the radiative cooling layer, configured to increase the radiative cooling emissivity, and configured to maintain the radiative cooling reflectivity;
• and
• a second reinforcement layer formed on the first reinforcement layer or the radiative cooling layer, formed of at least one fluorosilane-based material, and configured to increase a contact angle for a liquid material in contact with a surface.