Study And Application Of Multifunctional Thermal Insulation Energy-saving Coating

This paper focus on pressing situation on the needs of the the current environmental protection and energy-saving on building, the energy-saving insulation and high performance nano transparent insulation coating system that suitable for the construction glass was studied. The main content of this paper is: 1. choose and prepare for a suitable coating system; 2. study and prepare for energy-saving insulation nano functional materials.The UV curing water-borne polyurethane will have a good development prospect in future because it combines the advantages of UV curing and waterborne polyurethane. In this dissertation , pentaerythritol diacrylate was prepared by esterificate directly with pentaerythritol and acrylic. The influence to the structure of the pentaerythritol diacrylate with the different mole ratio between pentaerythritol and acrylic was researched, and a best formula was gained, and the structure of the pentaerythritol diacrylate was analyzed with FTIR and 1HNMR spectrum. Pentaerythritol diacrylate was taken as chain extender, and the polyurethane chain was embed C=C bond, and high performance UV curing water-borne polyurethane resin was prepared. The basic performance of UV curing water-borne polyurethane coating was tested.In this paper, raw materials is SnC1₄·5H₂O, CrC1₃·6H₂O and InCl₃·4H₂O. The thermal insulation functional nanopowder have been prepared by chemical co-precipitation method. XRD, SEM were applied to token the functional nonopowders. We have studied the effect on the functional nonopowder with Cr doping content, the In doping content and calcined temperature. The results is the functional nonopowder have tetragonal phase crystal structure with the same as SnO₂ when Cr and In was doped to it. The size of the powder particle that have homogeneous morphology is about 20-30nm. In binary functional nonopowder, with the Cr doping content increasing, the XRD diffraction peak intensity gradually weakened and the size of powder particle decreases. In ternary functional nonopowder, keep the amount of In doping content unchanged, with the Cr doping content increasing, the XRD diffraction peak intensity gradually weakened then increased and the size of particle decreased then increased; and keep the amount of Cr doping content unchanged, with the In doping content increasing, the XRD diffraction peak intensity gradually weakened then increased and the size of powder particle decreased then increased. In binary functional nonopowder, as the calcinations temperature increasing, the XRD diffraction peak intensity gradually increased, the size of powder particle increased.The functional nonopowder aqueous suspension was prepared by the method of functional nanopowder was scattered into deionized water. The influences of the different method of dispersion were discussed. The fitting preparation condition of the stable functional nonopowder aqueous suspension is as flowing: EFKA4550 used as dispersing agent, pH is 9-10, ultrasonic dispersion for 30min and then milling 3h. The average size of powder particle in the aqueous suspension is 20-30nm.The synthesized UV curing water-borne polyurethane resin was complexed with functional nonopowder aqueous suspension and the UV curing water-borne polyurethane curable transparent thermal insulation coatings have been prepared and the thermal insulation performance was tested with homemade thermal insulation test device. Considering from general performance, cost and some other factors of coating, the best content of functional nonopowder is 4.0 %, and the best thickness of the coating is 15μm. The visible light transmittance of the coating glass is 76%. When achieve equilibrium, the coating glass can reduce the temperature about 10℃than the blank glass. The coating have much good basic performance, such as hardness, wear-resistant and so on. As a new kind of energy saving and environmental friendly coating, it accord the development trend of coating, and it has certain practical application value and market prospect.