Research On Nano-TiO₂ Modified Fluorocarbon Coating And Painting Process

The aluminum-plastic composite panel has got more and more recognition in domestic and overseas architecture field since there are a good many of excellences, such as light weight, well flat degree, sound insulation, heat insulation and convenient coat technique. A very important cause of fluorocarbon coating to be recognized is that the coat technology of fluorocarbon coating has been applied in the surface treatment of aluminum-plastic composite panel. Because the fluorocarbon coating has outstanding anti-depigment, anti-frost, resisting atmosphere pollution corrasion (such as acid rain etc) and anti-atrocious weather capability, fluorocarbon coatings exceed any general coatings, thus that fluorocarbon coat technology is organically combined with aluminum-plastic panel offer a sort of new decoration material to architecture industry.However, when the surface of aluminum-plastic composite panel is coated by fluorocarbon coating, it will be polluted by all kinds of feculences, especially oleoresinous organic filth adhered to the film of fluorocarbon coating. Thus they are not easily swashed by water. If the fluorocarbon coating with photocatalysis film is fabricated, the coating film with self-cleaning capacity can automatically decompose organic contamination by itself. Hence, the anti-contamination, anti-rinse, antisepsis and anti-ultraviolet radiation performances of the modified fluorocarbon coating will be greatly promoted after qnatase nano-TiO2 is added in traditional fluorocarbon coating to produce a modified fluorocarbon coating. If the properties of fluorocarbon coating modified by nano-TiO2 are researched, it will improve the foreground of the product properties and has important realistic meaning.Qnatase nano-TiO2 with the particle diameters between 80 and 100 nm was used to fabricate the nano-TiO2-modified fluorocarbon coating, in which the dosage of nano-TiO2 was 2~3 (wt) % of fluorocarbon coating. Illumination experiments of methyl red solution besmeared on the coating were carried out to evaluate its self-cleaning performance. The dispersion situations of nano-TiO2 in the coating and the configuration of coating were charatered by TEM, Laser particle sizer, IR and SEM. Salt-spray resistance experiment was used to research the salt-spray resistance performance of nano-TiO2-modified coating. Xenon light aging apparatus and IR were used to mensure resistance aging performance and resistances ultraviolet of nano-modified coating. Pollution-proof performance of the nano-modified coating...