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使用高分子物质进行浸渗是出土饱水木质文物保护的常见保护方式。为了更好地掌控浸渗处理过程的进度,有必要测出加固材料在木材中的浸渗量。差式扫描量热分析(DSC)只需要毫克级微量样本,为将该技术应用于木材内聚乙二醇(PEG)含量检测,本文对DSC样本取样进行了实验研究,得到了相对误差±3.3%以内的浓度测定方法:使用不锈钢针穿刺取样,在真空干燥后进行DSC扫描。利用该方法,对50%PEG4000%溶液50℃连续浸渗处理1个月以上的木质文物样本进行了取样检测,根据检测结果估计了木材PEG浸渗状况。
The use of macromolecule material for infiltration is the common way of protection of the unearthed saturated watery wood artefacts. In order to better control the progress of the impregnation process, it is necessary to measure the impregnation amount of the reinforcing material in the wood. Differential Scanning Calorimetry (DSC) requires only milligram-level trace samples. In order to apply this technique to the detection of polyethylene glycol (PEG) in wood samples, DSC samples were studied experimentally with a relative error of ± 3.3 Concentration measurement within%: Sampling with a stainless steel needle and DSC scanning after vacuum drying. Using this method, samples of wood cultural relic treated with 50% PEG4000% solution continuously infiltrated at 50 ℃ for more than 1 month were sampled and tested, and the PEG impregnation status of wood was estimated based on the test results.