Nano titanium dioxide transparent dispersion adopts international advanced dispersion technology to disperse nano-titanium dioxide powder (5-30nm) in aqueous phase medium to form highly dispersed, uniform and stable nano-titanium dioxide aqueous transparent dispersion. In addition to the characteristics of nanometer titanium dioxide transparent dispersions, nanometer titanium dioxide transparent dispersions have higher activity and easy addition. The nano-titanium dioxide dispersion greatly exerts the role of nano-materials.

How to disperse nano titanium dioxide powder includes three stages of wetting, dispersion and dispersion stabilization. The main purpose of adding a dispersant is to wet the surface of the nanoparticles and reduce the surface energy. Dispersants can be divided into inorganic, organic, and inorganic / organic composite dispersants. Different dispersants have different dispersing mechanisms. There are three main mechanisms for the stable dispersing effect of dispersants on particles in suspension media, namely, the electrostatic stabilization mechanism, the steric hindrance mechanism, and the electric space stabilization mechanism.

Effect of pH value on the dispersibility of nano titanium dioxide
When nano titanium dioxide is dispersed in water, the ability of the hydroxyl groups on the surface of the nano titanium dioxide to obtain protons is weaker than water, so the surface of the nano titanium dioxide is negatively charged. When the pH is relatively low, Ti-OH2 is formed on the surface of the nano-titanium dioxide, resulting in a positive charge on the surface of the particles. As the pH value increases, the positive charge on the particle surface decreases, the electric double layer becomes thinner, the repulsive potential energy between the particles decreases, the nanoparticles are prone to agglomeration, and the dispersion performance becomes worse; when the pH value is in the middle value The Ti-OH bond is formed on the particle surface. At this time, the particle is electrically neutral. At this time, the nano-titanium dioxide has the worst dispersion performance. When the pH value is alkaline, the Ti-O2 bond is formed on the particle surface, which makes the particle surface negatively charged. At this time, the greater the pH value, the more negative charges on the particle surface, the thicker the electric double layer, the larger the repulsive potential energy between particles, and the better the particle dispersion effect.
Effect of electrolyte on nano TiO2 dispersion
Electrolytes such as sodium silicate, sodium tripolyphosphate, and sodium hexametaphosphate are typical electrostatic stabilization mechanisms. Part of the anion produced by ionization in water relies on van der Waals force to adsorb on the surface of negatively charged nano-TiO2 particles, strengthen the Zeta sites of the particles, and form an electric double layer structure. Studies have shown that when a very small amount of ammonium sulfate is added to an acidic solution of titanium dioxide, the sulfate ion neutralizes the positive charge at the titanium dioxide interface, reducing the repulsive potential energy, causing the particles to aggregate and fail to disperse. With the increase of ammonium sulfate Titanium dioxide adsorbs sulfate ions to form an electric double layer, which increases the repulsive potential energy and achieves the purpose of nanoparticle dispersion.
There are many factors that affect the dispersion of nano-TiO2, and the effects of pH and electrolyte on the dispersion of nano-TiO2 are mainly analyzed here.

Application
1. Water-based paint, environmental-friendly water-based paint, water-based paint.
2. Textile slurry
3. Sewage treatment
4. Air purification
5. Antibacterial material
6. Aerospace industry

SAT NANO can supply titanium TiO2 dispersion with 20-30%, if you have any enquiry, please feel free to ask us.