Huang Qijun, Zha Jianrui, Han Xiangna, Wang Hao
Institute of Cultural Heritage and History of Science and Technology, University of Science and Technology Beijing, Beijing 100083, China.
National Center for Archaeology, Beijing 100013, China.
Polymers (Basel). 2023 Dec 5;15(24):4621. doi: 10.3390/polym15244621.
Underwater artefacts are vulnerable to damage and loss of archaeological information during the extraction process. To solve this problem, it is necessary to apply temporary consolidation materials to fix the position of marine artifacts. A cross-linked network hydrogel composed of polyvinyl alcohol (PVA), tannic acid (TA), borax, and calcium chloride has been created. Four hydrogels with varying concentrations of tannic acid were selected to evaluate the effect. The hydrogel exhibited exceptional strength, high adhesion, easy removal, and minimal residue. The PVA/TA hydrogel and epoxy resin were combined to extract waterlogged wooden artifacts and marine archaeological ceramics from a 0.4 m deep tank. This experiment demonstrates the feasibility of using hydrogel for the extraction of marine artifacts.
水下文物在提取过程中容易受到损坏和考古信息的丢失。为了解决这个问题，有必要应用临时加固材料来固定海洋文物的位置。一种由聚乙烯醇（PVA）、单宁酸（TA）、硼砂和氯化钙组成的交联网络水凝胶已经被制备出来。选择了四种不同单宁酸浓度的水凝胶来评估效果。该水凝胶表现出优异的强度、高附着力、易于去除且残留极少。将PVA/TA水凝胶和环氧树脂结合起来，从一个0.4米深的水箱中提取出水浸木质文物和海洋考古陶瓷。该实验证明了使用水凝胶提取海洋文物的可行性。
