Aerogel blanket is a new type of light insulation material, which is widely used in petrochemical, thermal pipeline insulation, building internal and external wall insulation, new energy lithium battery heat insulation and fire prevention, LNG cryogenic and other fields. Then what elements need to be paid attention to when choosing aerogel blanket？
Heat-insulating Property
Heat-insulating properties are one of the most important factors in selecting aerogel. The thermal insulation performance depends on factors such as the density and thickness of the aerogel mat and the type of top coating. The density of aerogel felt is usually 160~240kg/m³, in general, the greater the density, the greater the thickness, the better the adiabatic performance. The surface coating provides additional protection and insulation.
Thermal Conductivity Number and Fire Rating
Thermal conductivity determines the thermal insulation effect of blanket, and fire rating is the guarantee of product safety. The smaller the thermal conductivity, the better the thermal insulation performance of aerogel felt, but it cannot be generalized or even exaggerated, aerogel also has a temperature range. Aerogel blanket below 400 ° C is a recognized insulation material with very good thermal insulation performance, 400° C -1000 ° C has better microporous nano thermal insulation material, is a branch of the aerogel family.
(Aerogel thermal conductivity ladder)
Generally, the thermal conductivity of aerogel blanket is below 0.020W/m·K, which can achieve better thermal insulation effect. A fire rating of A1 (non-combustible material) is a standard for excellent aerogel insulation blanket.
Hydrophilic and Hydrophobic
Aerogel blanket has two kinds of products, hydrophilic and hydrophobic, as the name suggests, hydrophilic is absorbent, hydrophobic is waterproof. In general, the surface of pure inorganic silicon aerogel contains Si-OH, which has strong hydrophilicity, easy moisture absorption and fragile, but the production cost of this kind of aerogel is low. The aerogel blanket made of organic functional group has certain hydrophobicity, which can achieve the effect of moisture and corrosion prevention.
Thickness and Width
The thickness and size of aerogel blanket can be selected according to actual needs. The greater the thickness, the better the thermal insulation performance of aerogel blanket. Thin aerogel blanket can save more space, but it will affect its thermal insulation effect. In terms of width, aerogel blanket is generally delivered in rolls, and the larger the width, the more labor and consumption will be saved when installed and used, and the joints between products can also be reduced to prevent heat loss caused by joints.
Durability
Some good aerogel blanket has a long service life and good durability, and can maintain good performance for a long time.
Environmental Conservation
In building materials, environmental protection has also become an increasingly important indicator, so it is necessary to consider its environmental protection when hanging aerogel blanket, good aerogel blanket is made from renewable resources, and does not release harmful substances during the production process.
