The goal of the study was to characterise chemical interactions between waterlogged archaeological wood and organosilicon compounds applied for its conservation to shed lights on the mechanism of wood dimensional stabilisation by the chemicals. Two alkoxysilanes (methyltrimethoxysilane and (3-mercaptopropyl) trimethoxysilane) and a siloxane (1,3-bis(diethylamino)-3-propoxypropanol)-1,1,3,3-tetramethyldisiloxane) were selected for the research since they already have been proven to effectively stabilise waterlogged wood upon drying. Fourier transform infrared spectroscopy was used for structural characterisation of the degraded wood and evaluation of reactivity of the applied chemicals with polymers in the wooden cell wall. The results obtained clearly show much stronger interactions in the case of alkoxysilanes than the siloxane, suggesting a different mechanism of wood stabilisation by these compounds. The results of this study together with other data obtained in our previous research on stabilisation of waterlogged archaeological wood with organosilicon compounds allow the conclusion that the mechanism of waterlogged wood stabilisation by the used alkoxysilanes is based on bulking the cell wall by silane molecules and wood chemical modification, while in the case of the applied siloxane, it builds upon filling the cell lumina.

中文翻译：

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红外光谱法评价不同有机硅与考古淹水木材之间的相互作用

该研究的目的是表征浸水考古木材与有机硅化合物之间的化学相互作用，该化学硅酸盐保护剂可用于保存该化学物质，以阐明木材尺寸稳定的机理。由于已经选择了两种烷氧基硅烷（甲基三甲氧基硅烷和（3-巯基丙基）三甲氧基硅烷）和硅氧烷（1,3-双（二乙基氨基）-3-丙氧基丙醇）-1,1,3,3-四甲基二硅氧烷进行研究。被证明可以有效地稳定浸水的木材，使其干燥。傅里叶变换红外光谱法用于降解木材的结构表征和评估所施加化学物质与木质细胞壁中聚合物的反应性。得到的结果清楚地表明，在烷氧基硅烷的情况下，其相互作用要比硅氧烷强得多，这些化合物表明木材稳定的机理不同。这项研究的结果以及我们先前关于用有机硅化合物稳定浸水考古木材的研究中获得的其他数据，可以得出这样的结论：用过的烷氧基硅烷稳定浸水木材的机理是基于硅烷分子和木材化学物质使细胞壁膨胀改性，而在使用硅氧烷的情况下，它是在填充电池管腔时建立的。