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Super-Hydrophilicity of Stainless Steel Surface Induced by Heat Treatment with Gaseous Ozone

机译:气态臭氧热处理对不锈钢表面的超亲水性

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The hydrophilic states of stainless steel surface treated by the separate or combined use of gaseous ozone and heat were investigated by measuring the contact angle of a water droplet, the content of the surface carbon contaminants, and the adsorption isotherm of water vapor. Super-hydrophilic states of stainless steel plates were achieved only by the combined gaseous ozone/heat treatment. The contact angle of a water droplet on the plate decreased from 81° to less than 5° after treating at 120 to 180 °C under 2 vol% ambient gaseous ozone. It was found that the super-hydrophilization proceeded according to two different mechanisms. One is the decomposition of surface contaminants. There was a good correlation between the surface carbon content and the water contact angle over the range of 15 to 81°. The other is the once removal of surface hydroxyl groups followed by chemisorption of water on these dehydroxylated sites. As a result of the removal of contaminants and the rehydration, the total number of surface hydroxyl groups on stainless steel became larger than that on the original surface.View full textDownload full textKeywordsOzone, Super-hydrophilicity of stainless steel, Gaseous ozone/heat treatment, Water contact angle, Surface carbon content, Surface hydroxyl groupRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/01919512.2012.705248
机译:通过测量水滴的接触角,表面碳污染物的含量以及水蒸气的吸附等温线,研究了通过单独或联合使用气态臭氧和热处理过的不锈钢表面的亲水状态。仅通过组合气态臭氧/热处理才能获得不锈钢板的超亲水状态。在2vol%的环境气态臭氧下于120至180°C处理后,水滴在板上的接触角从81°降至小于5°。发现超亲水化是根据两种不同的机理进行的。一种是表面污染物的分解。在15至81°的范围内,表面碳含量与水接触角之间具有良好的相关性。另一个是一旦除去表面羟基,然后在这些脱羟基位点上化学吸附水。由于去除了污染物并重新水化,不锈钢表面的羟基总数变得比原始表面大。查看全文下载全文关键词臭氧,不锈钢的超亲水性,气态臭氧/热处理,水接触角,表面碳含量,表面羟基相关变量var addthis_config = {ui_cobrand:“泰勒和弗朗西斯在线”,servicescompact:“ citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,更多”, pubid:“ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/01919512.2012.705248

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