The nano-structured silica of adhesive grade (ZEO5)
The nano-structured silica is used in the adhesive industry as a rheological control additive due to its suitable specific surface area and low specific weight due to its fine particle size. Also, nano-structured silica increases the mechanical strength of the adhesive such as elongation and shear by increasing its concentration. Because the polymers used in the adhesive industry have a refractive index close to that of silica. Nanostructured silica can produce adhesives with high quality and transparency.
Precipitated silica and fumed silica are two different types of silica with distinct properties and manufacturing processes.
Energy Requirement:
Precipitated Silica: The manufacturing process for precipitated silica involves mixing chemicals, precipitation, filtration, washing, drying, and milling. This process requires less energy compared to the production of fumed silica.
Fumed Silica:
The production of fumed silica involves high-temperature reactions in a flame reactor using silicon compounds. This process requires significant energy input due to the need for high temperatures.In summary, precipitated silica has larger particle sizes, lower surface area, and requires less energy during its manufacturing process compared to fumed silica. On the other hand, fumed silica has smaller particle sizes, higher surface area, and requires more energy for its production.
Manufacturing Process:
Precipitated Silica: It is produced by adding a mineral acid to a solution of sodium silicate, resulting in the precipitation of amorphous silica particles.
Fumed Silica: It is manufactured by burning silicon tetrachloride or silicon compounds in a flame of hydrogen and oxygen, leading to the formation of fine, nanoscale particles of amorphous silica.
