Prepartion Of Organic-Inorgannic Hybrid Coating Material Encapsuled With Inhibitor

Organic-inorganic materials show excellent mechanical properties andgood aging resistance, in that, it could be used in the conservation of ironrelics. During the conservation of iron relics, coating materials are usuallyused as the barrier of moisture and oxygen. But for the excavated iron objects,great deal of salt deposited in the holes and cracks after many years burial.During the conservation, salt could not be eliminated thoroughly. The inneranion, especially Cl-1could immigrate to the surface of the object, and causecorrosion of the substrate by autocatalysis, which will result in the failure ofthe coating. As a result, introducing the corrosion inhibitor during theconservation of iron relics is indispensable. In this dissertation,organic-inorganic hybrid coating materials encapsulated with inhibitor wasprepared. Firstly, organosilicon was introduced into the polymerization ofacrylate to form copolymer. Secondly, corrosion inhibitor sodium tungstatewas encapsulated in the silica particles. Then the organic-inorganic materialsencapsulated with inhibitor was obtained by mixing the coating materials andthe silica particles. Organosilicon/acrylate copolymer was prepared through semi-continuousseed emulsion polymerization. The polymerization conditions includingtemperature, the content of initiator, the content of emulsifier, pH value ofthe polymerization system and the content of organic siloxane were discussed.The chemical structure of the copolymer was characterized with¹H NMR andFT-IR. The mechanical properties and thermal properties were studied.Silica particles encapsulated with corrosion inhibitor sodium tungstate wassynthesized through reverse emulsion polymerization. In the emulsionpolymerization system, cyclohexane was used as dispersion medium, Span80and OP-10was used as emulsifier, TEOS was used as monomer, ammonia wasused as catalyst. The morpHology of the particles was characterized with SEM.The distribution of the corrosion inhibitor sodium tungstate was investigatedthrough Scanning Transmission Electron Microscope-X Ray EnergyDispersive Spectrometer （STEM-EDS）. And the release of the corrosioninhibitor was studied by ICP.Micro capsules loaded with inhibitor sodium tungstate was added into theorganosolicon and acrylate copolyer to form the hybrid coating materials. Andthe mechanical properties and corrosion resistance was studied preliminarily.