Cs0.33WO3 is used to produce dispersion first, and then the prepared dispersion is prepared into transparent thermal insulating coating. Wherein, appropriate dispersant is necessary as such a dispersant can keep Cs0.33WO3 dispersion stability. According to the experts, the PVA and titanate coupling agent have better dispersing effects than poly-carboxylic salt.
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The experts also introduced that PVA has massive hydroxyl groups, so it can improve the wetting and dispersion properties of Cs0.33WO3 particles by chemisorption of massive hydroxyl onto the particle surface. Similarly, titanate coupling agent has alkoxy groups, they can react with the surface hydroxyl groups on the Cs0.33WO3 particles, and thus the dingal group of the coupling agent covered the surface of the particles and stabilized the suspension to an extent. Whereas, poly-carboxylic salt dispersant belong to anionic surfactant and the electric double layer might be compressed when the particle surface adsorbed large amount of anions, which is not bene?cial to dispersion stability of the particles.
