The atmospheric trace components that cause the greenhouse effect are called greenhouse gases. H2O and CO2, which already exist in the atmosphere, are natural greenhouse gases. It is precisely under their influence that the most suitable environmental temperature for Earth’s organisms is formed, enabling life to survive and reproduce on Earth. Without the atmosphere and these natural greenhouse gases, the surface temperature of the Earth would be 33 ℃ lower than it is now, and humans and most animals and plants would face a survival crisis.
However, the main reason for global climate change is due to the excessive use of energy and exploitation of natural resources by humans in their own development process, resulting in a rapid increase in greenhouse gas concentrations in the atmosphere.
Double carbon, abbreviated as carbon peak and carbon neutrality.
In September 2020, China clearly proposed the goals of “peaking carbon emissions by 2030” and “carbon neutrality” by 2060. The “dual carbon” strategy advocates a green, environmentally friendly, and low-carbon lifestyle. Accelerating the pace of reducing carbon emissions is conducive to guiding green technology innovation and improving the global competitiveness of industries and economies. China continues to promote industrial and energy restructuring, vigorously develops renewable energy, and accelerates the planning and construction of large-scale wind and photovoltaic base projects in desert, Gobi, and desert areas, striving to balance economic development and green transformation simultaneously.
Aerogel is a solid material form, which has the smallest density in the world at present.
Aerogel is a combination word. Here aero is an adjective, meaning “in the air”. Gel is obviously gel, which literally means gel of air. The gel of any substance can be called aerogel as long as it can be dried to remove the internal solvent and keep its shape basically unchanged, and the product has high porosity and low density.
The common aerogel of gel is silicon aerogel gel. Because of its extremely low density, the lightest aerogel is only 0.16mg/cm3, slightly lower than the air density, so it is also called “frozen smoke” or “blue smoke”. Due to the very small particles inside (at the nanoscale), visible light scatters less when passing through it (Rayleigh scattering), just like sunlight passing through air. Therefore, it also looks blue like the sky (if there are no other things mixed inside), and slightly red when looking at the light. The sky is blue, while the evening sky is red. Due to
More than 80% of the aerogel is air, so it has a very good heat insulation effect. An inch thick aerogel is equivalent to 20 to 30 pieces of ordinary glass. Even if the aerogel is placed between the rose and the flame, the rose will not be damaged at all.
Aerogel also has a variety of uses in space exploration, including the Russian “Peace” space station and the American “Mars Pathfinder” probes.
Silica aerogel is by far the best material for thermal insulation.
1. “Infinite path effect”: The almost infinite number of nanopores allows heat flow to transfer only along the pore walls in a solid, and the almost infinite number of pore walls constitute an almost “infinite path” effect, which reduces the ability of solid heat conduction to the lowest limit.
2. “Zero convection” effect: when the diameter of the pores in the aerogel material is less than 70nm, the air molecules in the pores lose the ability of free flow and relatively attach to the pore wall, when the material is in a vacuum state.
3. “Infinite heat shield effect”: the number of pore walls inside the aerogel material tends to be “infinite”, which acts as a heat shield for each pore wall, thus reducing the heat radiation heat transfer to near the minimum limit.
The Opinion of the Central Committee of the Communist Party of China and the State Council on Fully Implementing the New Development Concept and Doing a Good Job in Carbon Peaking and Carbon Neutrality (Zhongfa [2021] No. 36) has been released, which clarifies the important opinions of China on doing a good job in carbon peaking and carbon neutrality.
The document requires accelerating the research and promotion of advanced and applicable technologies. Conduct in-depth research on smart grid technologies that support large-scale and friendly grid integration of wind and solar power generation.
Strengthen the research, demonstration, and industrial application of new energy storage technologies such as electrochemistry and compressed air. Strengthen the research and development, demonstration, and large-scale application of key technologies for hydrogen production, storage, and application. Promote energy-saving and low-carbon technologies such as energy cascade utilization in the park. Promote the R&D and application of new materials such as aerogel. Promote the research and development, demonstration, and industrial application of large-scale carbon capture, utilization, and storage technologies. Establish and improve a green and low-carbon technology evaluation and trading system, as well as a technology innovation service platform.
Air gel thermal insulation coating
Air gel thermal insulation coating is mainly composed of high-performance thermal insulation coating prepared by special process with special high-performance resin lotion as film-forming material, preferred SiO2 aerogel and hollow glass beads as thermal insulation filler, and water as solvent. Forming a dense insulation layer on the surface of the coating can effectively block the conduction of solar radiation heat and air heat radiation, reducing the internal and external heat exchange of the coating.
Features:
The material is lightweight and crack resistant, eliminating the risk of detachment.
Simplify manual processes and improve space utilization.
Significantly reduce the difficulty of infinite waste disposal in buildings.
Avoid the problem of detachment caused by excessively thick insulation layer.
Air gel thermal insulation coating for building
Primer: alkali resistant, waterproof
Aerogel insulation midcoat: thermal barrier
Putty layer: protective intermediate coating
Topcoat: thermal reflection, thermal radiation
Mainly used for insulation and heat preservation of building exteriors, building curtain walls, wall roofs, underground tunnels, etc., it is also suitable for applications in multiple fields such as industrial low-temperature pipelines, storage tanks, communication base stations, ships, and automotive transportation.
Features of aerogel fire retardant coating:
Excellent thermal insulation performance, energy conservation, environmental protection, and long service life.Using special resin as raw material and adding SiO2 aerogel material, it has excellent performance and durability
Excellent heat and corrosion resistance. The material is a paste like water-based coating with good adhesion
High volume solid content, low VOC, and hydrophobic, anti condensation,
Flame retardant/fireproof, energy-saving and environmentally friendly
Product application:
Oil storage tanks, pipelines, boilers
Heat exchanger, power lithium battery
Underground tunnels and communication base stations
