Nano thermal insulation coatings can be used to absorb ultraviolet rays from sunlight, and are often used in current decoration buildings. Water-based nano transparent thermal insulation coating not only has the effect of high efficiency and energy saving, but also has the comprehensive advantages of green environmental protection, health and safety. As an alternative product of solvent-based glass nano transparent thermal insulation coating, its market prospect is broad, and it is also suitable for the energy saving and emission reduction advocated by the state. , environmental protection has profound practical significance and positive social significance

Thermal insulation mechanism of nano transparent thermal insulation coating:
The energy of solar radiation is mainly concentrated in the wavelength range of 0.2 to 2.5 μm. The specific energy distribution is as follows: the ultraviolet region is 0.2 to 0.4 μm, accounting for 5% of the total energy; the visible light region is 0.4 to 0.72 μm, accounting for 45% of the total energy. ; The near-infrared region is 0.72 to 2.5 μm, accounting for 50% of the total energy. It can be seen that most of the energy in the solar spectrum is distributed in the visible light and near-infrared regions, of which the near-infrared region accounts for half of the energy. Infrared light does not contribute to the visual effect. If this part of the energy is effectively blocked, it can have a good heat insulation effect without affecting the transparency of the glass. Therefore, there is a need to prepare a material that can effectively shield infrared light and transmit visible light.

3 common nanomaterials used in transparent thermal insulation coatings:

1. Nano ITO

Nano-ITO (In2O3-SnO2) has excellent visible light transmittance and infrared blocking properties, and is an ideal transparent thermal insulation material. Since indium metal is a scarce metal, it is a strategic resource, and the raw material of indium is expensive. Therefore, in the development of transparent thermal insulation ITO coating materials, it is necessary to strengthen process research to reduce the use of indium on the premise of ensuring the transparent thermal insulation effect, thereby reducing production costs.

2. Nano CS0.33WO3

Cesium tungsten bronze transparent nano thermal insulation coating stands out from many transparent thermal insulation coatings due to its environmental friendliness and high thermal insulation characteristics, and currently has the best thermal insulation performance.

3. Nano ATO

Nano ATO antimony doped tin oxide coating is a transparent thermal insulation coating material with good light transmittance and thermal insulation performance. Nano antimony tin oxide (ATO) has good visible light transmittance and infrared blocking properties, and is an ideal thermal insulation material. The method of adding nano-tin antimony oxide into the coating to make the transparent thermal insulation coating can effectively solve the problem of thermal insulation of glass. market expectation.

4. Nano VO2

Vanadium dioxide (VO2) is considered to be the most promising thermochromic material. It can keep the visible light unchanged, that is, the appearance is unchanged, and only adjust the sunlight transmission in the near-infrared region with temperature changes. VO2 has reversible metal-semiconductor phase transition characteristics; before and after the phase transition occurs, important optical properties change mainly in the near-infrared band, that is, from infrared transparency below the phase transition temperature (semiconductor state) to above the phase transition temperature (metal state) of infrared reflection.

Features of nano thermal insulation coating:

1. Insulation
Nano thermal insulation coating can effectively block infrared and ultraviolet rays in sunlight. When sunlight penetrates the glass and enters the room, it can block more than 99% of ultraviolet rays and block more than 80% of infrared rays. And it's very good thermal insulation, can make the indoor temperature difference 3-6˚C, can keep the indoor cool air.

2. Transparent
The surface of the glass coating film is very transparent, and it forms a film layer of about 7-9 μm on the surface of the glass, which has an excellent lighting effect and will not affect the visual effect. It is especially suitable for glass with high requirements for lighting, such as hotels, office buildings, and residences.

3. Keep warm
Another feature of this material is that it has a good thermal insulation effect, because the micro-film layer on the surface of the glass coating blocks the indoor thermal energy, maintains the indoor heat and temperature, and allows the indoor to achieve a thermal insulation state.

4. Energy saving
Because the nano thermal insulation coating has the effect of heat insulation and heat preservation, the indoor temperature and the outdoor temperature rise and fall evenly, so it can reduce the number of switching of air conditioning or heating, and save a lot of money for the family.

5. Environmental protection
Nano thermal insulation coating is also a very environmentally friendly material, mainly because the coating film does not contain benzene, ketone and other ingredients, and does not contain other harmful substances. It is truly green and environmentally friendly and meets international environmental quality standards.