Ionic nanoparticles in heritage conservation; treatments for the Mary Rose timbers

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• 作者：Alan V. Chadwick ; Eleanor J. Schofield ; A. Mark Jones ; Giannantonio Cibin ; J. Fred W. Mosselmans
• 关键词：Nanoparticles ; Strontium carbonate ; Archaeological wood ; Mary Rose ; Diffusion ; X-ray absorption spectroscopy
• 刊名：Solid State Ionics
• 出版年：2012
• 出版时间：4 October, 2012
• 年：2012
• 卷：225
• 期：Complete
• 页码：742-746
• 全文大小：635 K

文摘

A potential method for the de-acidification of water-logged archaeological wood is through a treatment with alkaline nanoparticles. To provide information on the process we have measured the penetration of strontium carbonate nanoparticles in fresh oak blocks from dispersions of water and 2-propanol. The diffusion coefficient into the wood from aqueous dispersions is ~ 3 ¡Á 10^? 12 m² s^? 1. The diffusion is slower from the alcohol dispersion. Diffusion is also slower for samples treated with PEG200. X-ray absorption studies show that iron sulfates in wood are converted to siderite and goethite, removing the potential for the formation of sulfuric acid.