Nano grain size cesium tungsten oxide may be used to prepare thermal insulation masterbatch, and thus be applied to produce heat insulating materials such as transparent heat-insulating film for architectural glass. In order to make the obtained masterbatch have good dispersibility in the subsequent products, the raw material cesium tungsten oxide nanopowder, i.e., cesium tungsten bronze nanopowder, must have excellent dispersibility. Therefore, for the agglomerated nanoparticles, it is necessary to carry out related treatment such as surface modification treatment to improve the dispersibility.
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Experts say that surface modification method is a more effective way to improve the dispersion of nanoparticles in chemical dispersion method. According to the chemical reaction between the modifier and the surface of nanoparticles, the surface modification method can be divided into two major types: surface physical modification method and surface chemical modification method. So what is surface chemical modification? Surface chemical modification is the modification of surface structure and state of particles after the nanoparticles adsorption of modifier, and the purpose of modification is achieved. Chemical surface modification method includes organic small molecule graft modification method and polymer graft modification method. Due to the presence of hydroxyl groups on the surface of nanoparticles, it helps the dispersant to adsorb to the surface of nanoparticles.
