期刊
PURE AND APPLIED CHEMISTRY
卷 89, 期 1, 页码 29-39出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/pac-2016-1014
关键词
alkaline nanoparticles; alum salt; archaeological wood; hybrid systems; in situ polymerization; Oseberg finds; pH control; POC-16
资金
- Norwegian Ministry of Research and Higher Education
- University of Oslo
The alum-treated Viking Age archaeological wooden objects from the Oseberg find have undergone extensive chemical deterioration due to the original conservation treatment, based on alum salts (KAl(SO4) (center dot) 12H(2)O), done in the early 1900s. Today, the artifacts are highly acidic (pH <= 2) and fragile; in some cases wood has almost completely lost its structural integrity. Research on conservation methods for these finds is currently underway. In the present study, organic/inorganic multi-functional `hybrid systems' -using propylene glycol modified TEOS and alkaline nanoparticles (Ca(OH)(2))-have been engineered to deacidify and consolidate alum-treated wood in a single step. The advantage of using silicon monomer and nano-materials as a starting point resides in their ease of penetration into the wood structure, where silicon monomers subsequently undergo polymerization. Treated samples were investigated using thermal analysis (DTG), X-Ray Diffraction (XRD), infrared spectroscopy (ATR-FTIR), SEM/EDX and Gas Chromatography Mass Spectroscopy (GC-MS). Results suggest that in addition to consolidating the wood, alkoxysilanes could act as a bridging agent between remaining lignin and calcium hydroxide nanoparticles.
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