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As new materials, hydrophilic materials have attracted considerable attention. Hydrophilic materials have received various applications in environmental purification, medicine health, agricultural production, outdoor protection and food packaging due to the hydrophilicity of their surface. Surface hydrophilic membrane material is the favor of researchers. Polyethylene is the representative of organic film materials, it is widely used as for their low cost, stable chemical property, better thermal stability, excellent dielectric properties and low coefficient of friction, but its bad surface hydrophilic restricted its applications. The TiO2thin film is the representative of inorganic thin film materials, as an environment-friendly material, based on the hydrophilicity and photocatalytic activity of TiO2under UV light irradiation, the preparation of hydrophilic TiO2thin films applyed on kinds of substrates is the trend of industrial application. In this paper, hydrophilic polyethylene films and hydrophilic TiO2films were prepared via differ treatments. The main contents and results are organized as follows:Hydrophilic polyethylene films were prepared by the low-temperature plasma technology. Atmospheric Pressure low-temperature plasma was first used to the treatment of polyethylene films surface with argon, and investigated their hydrophilicity. Then the plasma treatment of atomizing acrylic monomers generate hydrophilic group, which react with the radicals of the thin films surface to form a layer of hydrophilic films. This paper examines the impact of different power, gas flow rate, processing time on the preparation of hydrophilic film, so as to determine the optimum technological parameter.The nanometer TiO2sol was prepared by the sol-gel method and combining with dip-coating method to produce nanometer TiO2film. The hydrophilicity and photocatalytic activity of samples were also investigated. In the paper, TiO2sol was prepared under HCl-ethanol-H2O system, and the influence factor of its particle size and particle size distribution were investigated, such as the content of hydrochloric acid, the spot time of hydrochloric acid and temperature, etc. Then the different particle size of TiO2sol was used to prepare nanometer TiO2film and their performances were examined, in order to obtain the optimum condition.
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