Acidic silica sol is a colloidal solution of amorphous silica particles

Acidic silica sol is a colloidal solution of amorphous silica particles. Its pH ranges from 2 to 6. Its properties are excellent, making it useful in a variety of industries, from textiles to high glossy photo paper. In addition to its many industrial applications, acidic silica sol can also be used as a battery.

A typical commercial silica sol with thirty to forty percent particle concentration has a zeta potential between -30 and -40 mV. The size of the charged surface is measured as the Debye-Huckel kappa (k), which is proportional to the length of screening. As the salt concentration increases, the Debye sphere shrinks and the double layer becomes more compact.

The particle size and distribution are also important factors. The bigger the particles, the more surface area is available to form stable siloxane bonds. Similarly, polydispersity affects the gel strength. If the particles are clumped closer together, the strength of the gel will increase. Although this effect is not yet supported by research, it is thought to contribute to the strength development of the aggregates.

The surface composition of silica particles also plays a role in stabilizing them. Na2O and Al(OH)4 are common stabilizers, and they are important for decreasing the viscosity of concentrated silica sols. These stabilizers also help control the counter ions, which are produced during the dissociation of Na2O. This process is vital for controlling particle stability. However, it is important to note that the stabilization of silica particles is not possible without the presence of counter ions.

The addition of alkaline aluminate aqueous solution to a silica sol is necessary for stabilization. The amount of alkaline aluminate added depends on the diameter and surface area of colloidal silica. For example, smaller particles will require more alkaline aluminate.

When using silica sol in grouting applications, the gel strength, hydraulic conductivity, and durability are crucial. The chemical properties of silica sols are directly related to these properties. For these reasons, it is important to select the right type of acid solution for the specific application. There are a variety of silica sols available commercially. The most popular are the Levasil(r) and Ludox(r) series, produced by AkzoNobel and Grace, respectively.

The use of a solvent-based synthesis process is useful for the preparation of novel hybrid materials with both organic and inorganic components. These new materials have synergistic properties that extend to the final material. They can also be used to create nanoparticles. Another example of a hybrid material is a solution of tannic acid and silica.

pH is an important factor in the formation of gelling silica particles. It governs the surface charge and the stability of the particles. High pH can create DLVO phenomena, while low pH causes non-DLVO. Therefore, it is crucial to use a pH-controlled acid-based solution for silica gelling applications. It is important to note that pH affects the behaviour of different accelerators. Its presence in a solution can have both positive and negative impacts.

Acid Series Colloidal Silica/Silica Sol

Acidic silica sol is a colloidal solution formed by uniform diffusion of silica particles in water. The pH is 2 to 6. It has many excellent properties and characteristics.

Product application: textiles, coatings, non-stick coatings and other industries, Catalyst carrier, high glossy photo paper and battery .