Heat-insulating nano-coatings can be used to absorb ultraviolet rays from the sun, and are often used in current decoration buildings. The 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 environmental protection, health and safety. Its market prospects are broad, and it has profound practical and positive social significance for energy conservation, emission reduction, and environmental protection advocated by the state.
Thermal insulation mechanism of nano transparent thermal insulation coating:
The energy of solar radiation is mainly concentrated in the wavelength range of 0.2～2.5μm, and the specific energy distribution is as follows: the ultraviolet region is 0.2～0.4μm accounting for 5% of the total energy; the visible light region is 0.4～0.72μm, accounting for 45% of the total energy ; The near-infrared region is 0.72 ~ 2.5μm, 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 and near-infrared regions, and 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, it is necessary to prepare a substance that can effectively shield infrared light and transmit visible light.
3 kinds of nano materials commonly used in transparent thermal insulation coatings:
1. Nano ITO
Nano-ITO (In2O3-SnO2) has excellent visible light transmittance and infrared blocking characteristics, and is an ideal transparent thermal insulation material. Since indium metal is a scarce metal, it is a strategic resource, and indium raw materials are expensive. Therefore, in the development of transparent heat-insulating ITO coating materials, it is necessary to strengthen process research to reduce the amount of indium used on the premise of ensuring the transparent heat-insulating 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 kind of 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 barrier properties, and is an ideal thermal insulation material. The method of adding nano tin oxide antimony to the coating to make a transparent thermal insulation coating can effectively solve the thermal insulation problem of glass. Compared with similar products, it has the advantages of simple process and low cost, and has extremely high application value and broad application.
Features of nano thermal insulation coatings:
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. Moreover, its heat insulation effect is very good, 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. It forms a film layer of about 7-9μm on the surface of the glass. The lighting effect is excellent and the visual effect will not be affected. It is especially suitable for glass with high lighting requirements such as hotels, office buildings, and residences.
3. Keep warm
Another feature of this material is its good heat preservation effect, because the micro-film layer on the surface of the glass coating blocks indoor heat, maintains the heat and temperature in the room, and makes the room reach a heat preservation state.
4. Energy saving
Because the nano thermal insulation coating has the effect of heat insulation and heat preservation, it makes the indoor temperature and the outdoor temperature rise and fall in a balanced manner, so it can reduce the number of times the air conditioning or heating is turned on and off, which saves a lot of expenses 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, nor does it contain other harmful substances. It is truly green and environmentally friendly and meets international environmental quality standards.