Preparation Of Nanosized Antimony Doped Tin Oxide (Ato) Dispersions And Their Transparent Nanocomposite Film And Performance Study

Energy-saving glass has been a hot research point in the field of construction architect. However, the main type of energy-saving glass on the market is coated glass, which needs complex technology and high cost. Another type of energy-saving glass is filmed glass, which is usually prepared by coating mixture of transparent paint and nanomaterials or organic paints on glass, which could result in environmental related problems. Therefore, the environmentally energy-saving film prepared in aqueous phase will be the main development direction in the field of construction architect. In this paper, we synthesized the nanosized transparent Sb-doped SnO2 (ATO) dispersions by hydrothermal method and mixed these dispersions with water-dilutable resin to synthesize ATO heat-shielding film. The influences of experimental parameters on the morphology, dispersity and optical property of nano ATO have been studied. The results are shown as follows:ATO dispersions were prepared by hydrothermal methods. Influence of doping ratio, pH, dosage of modifier, reaction temperature and reaction time on the morphology, dispersity and optical properties of ATO nanoparticles was investigated. The results indicated that ATO nanoparticles dispersions were prepared with Sb doped concentration of 15%, pH value of 8, modifier of 1.2 wt%, modifying temperature of 25℃ reaction temperature of 240℃ and reaction time of 16 h. ATO nanoparticles showed 6-10 nm particle size in diameter and narrow size distribution and remarkable dispersity in water phase. Meanwhile, the Visible Light Transmitted of ATO dispersions is 80% on 550 nm and Infrared Radiation Rejected of that is 84% on 1250 nm.Accordingly, the nanosized transparent composite film with strong infrared radiation rejected property had been prepared based on simple mixing nano-ATO dispersions with water-base resin. Influence of water-base substrate material, dosage of ATO dispersions and filming thickness on the optical properties of the transparent composite film was investigated. The results indicated that ATO transparent composite film was prepared with mess ratio of ATO/polyurethane of 3:10 and filming thickness of 4μm, which shows uniformly smooth surface and strong adhesion between film and glass. Moreover, the visible light transmitted of transparent composite film is 80% on 550 nm and infrared radiation rejected of that is 92% on 1500 nm. The performance study indicates that this nanosized transparent composite film has an excellent heat insulation effect.