The Influence Of Cooling Paint Pigments And Fillers On The Cooling Effect Of Cooling Paint

Cooling paints are new types of functional coatings. It can effectively prevent the heat conduction, reduce the temperature of the coating surface and internal environment, so as to improve the working environment, to achieve the purpose of reducing energy consumption. Every kind of cooling paints have more study at home and abroad already, however, all kinds of pigments and fillers on the cooling effect have no basis for reference. So the main study of this thesis is the influence of various pigments and fillers on the cooling effect of cooling paint. So it studies the cooling effects of cooling pigments and fillers mainly in this paper.In this paper the testing reflectivity was made to test the reflectivity of coating paint, moreover the testing cooling effect was made to test the cooling effect of coating paint. Selected TiO2 as coating pigment, diatomite, hollow glass beads, sepiolite, far-infrared ceramic powder, SiO2 as functional fillers, respectively studied the influence for the addition quantity of every pigment and fillers to the reflectance and cooling effect, discussed the influence for the crystal type, dispersivity, particle size, coating thickness and other factors of the pigment and fillers to the reflectance and cooling effect also. Besides, modified hollow glass beads by coated with TiO2, prepared cooling paint with it and compared cooling effect with non-modified also.The result showed that, through the determinaton for the coating reflectivity of single-species filler it can be found that, the reflectivity of TiO2 tended to increased first and decreased after with the increased of PVC; the reflectance of those functional fillers increased basically with the increased of PVC, different kind of fillers had different changes; when the sigle-species functional filler compound with titanium dioxide, it can be conclude from the determination of the coating reflectivity and cooling effect that the best addition quantity of hollow glass beads was about 10%, the best addition quantity of silicon dioxide was about 5%, the best addition quantity of diatomite was about 20%, the best addition quantity of far-infrared ceramic powder was about 20%; choose hollow glass beads which had better refectance effect and diatomite which had better insulation effect to prepare cooling coating which had reflactance and insulation two kinds cooling mechanics, it can be found from the determination of cooling effect that, when the addition quantity of hollow glass beads and diatomite were 10% and 15% would have better cooling effect, moreover the cooling effect was better than single-species cooling mechanic coating.Moreover, through the other factors it can be found that, the particles of titanium dioxide dispersed as possible, the higher the reflectivity and the better cooling effect; whether apparent performance or cooling effect for the hollow glass beads of low alkaline was better than alkaline one; small size particle of the far-infrared ceramic powder could get better cooling effect than larger one; the coating reflectivity only had relation with small thickness of coating surface, the best film thickness was about 120μm.After modification of hollow glass beads it can find that hollow glass beads uniformly coated with a layer of TiO2 on the surface, and got rutile phase mainly, besides the cooling effect of made cooling paint by it was better than that made by unmodified hollow glass beads, compared with unmodified hollow glass beads coating, the testing temperature can low about 4℃.Select a better cooling effect coating which had two mechanics and compared with two kinds of cooling paints market presence, the testing temperature was lower 2℃and 3℃respectively, cooling effect was better than that.