共查询到19条相似文献,搜索用时 93 毫秒
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F. Marson 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1969,19(4):93-99
A theoretical approach to the problem of how contact leaching anti-fouling paints work is discussed; a possible mechanism is selected and applied to an idealised model of a paint film. A precise mathematical treatment is then attempted of the relationship between the leaching rate, the physical properties, and if applicable the chemical properties of the envisaged paint film and its environment. A mechanism previously proposed has been examined by this method. An equation is derived for an idealised paint film relating the leaching rate to the physical properties of the paint film and the leachate. It is assumed that the rate of solution of a soluble pigment from an insoluble vehicle is dependent only on the physical properties of the paint film and the diffusion of the solvated pigment through the exhausted matrix and the diffusion layer of leachate in direct contact with the surface of the paint. An equation is derived for an idealised paint film which relates the leaching rate to some physical properties of the paint film and of the leachate. The equation is shown to predict qualitatively the effect of most variables known to affect the leaching of contact leaching paints. Some evidence is given to support the quantitative prediction of the relationship between the pigment volume content and the initial leaching rate, the effect of dissolved pigment in solution on the leaching rate, the increase in leaching rate for a given temperature increase, and the effect of velocity of flow past the surface of the paint film. This method of approach would appear to be applicable to mechanisms and models bearing a closer resemblance to practical anti-fouling paints. However, the mechanism proposed appears sufficiently well substantiated to be employed in the design of leaching experiments and their application to more practical problems, such as the formulation of anti-fouling paints. The need of a more rigorous approach to the design of leaching experiments is indicated. 相似文献
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Gordon McKay Henry S. Blair Stuart Grant 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1987,40(1):63-74
Chitoson, a high molecular weight polymer, has the ability to sorb metals and form chitosan-metal complexes. A complex using copper has been prepared and its desorption characteristics have been studied. The slow release of copper is of potential use in anti-fouling paints and therefore the desorption of copper has been studied under various environmental conditions. Desorption rates were high in distilled water but low in sea water, and after further comparative tests with commercial marine paints, it was concluded that copper-chitosan complexes are not as effective as the cuprous oxide anti-fouling agent currently used in marine paint formulations. 相似文献
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用酶防污,消除毒素对环境的危害,这是环境友好型防污涂料的重要发展方向之一。阐述了酶防污涂料的发展历程、防污机理以及就"留住"防污涂料中的酶及其发展前景作了粗浅的探索。 相似文献
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开发低毒、无毒的环境友好型抗海洋生物污损涂料的途径主要有两个方面:一是寻找防污高分子材料;二是寻找无毒的防污剂,在不破坏环境的前提下防止生物附着。综述了环境友好型抗海洋生物污损涂料的研究现状,结合纳米银在防污涂料中的应用,探讨了抗海洋生物污损涂料的发展趋势。 相似文献
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根据对建筑涂料行业的了解并参考有关资料,介绍了我国建筑涂料的目前状况,以及得以快速发展的原因,建筑涂料行业面临的发展机遇等,提出发展我国建筑涂料的几点建议。 相似文献