Zha Jianrui, Huang Qijun, Liu Xinyi, Han Xiangna, Guo Hong
Institute of Cultural Heritage and History of Science and Technology, University of Science and Technology Beijing, Beijing 100083, China.
Polymers (Basel). 2023 Jul 2;15(13):2929. doi: 10.3390/polym15132929.
The presence of calcareous concretions on the surface of marine archaeological ceramics is a frequently observed phenomenon. It is necessary to remove these materials when the deposits obscure the feature of ceramics. Unfortunately, calcareous concretions provide distinctive documentation of the burning history of ceramics. The interaction of acid solution or detachment of the deposit layers in physical ways leads to the loss of archeological information. To prevent the loss of archeological information and to achieve precise and gentle concretion removal, responsive hydrogel cleaning systems have been developed. The hydrogels synthesized are composed of networks of poly(vinyl acetate)/sodium alginate that exhibit desirable water retention properties, are responsive to Ca ions, and do not leave any residues after undergoing cleaning treatment. Four distinct compositions were selected. The study of water retention properties involved quantifying the weight changes. The composition was obtained from Fourier transform infrared spectra. The microstructure was obtained from scanning electron microscopy. The mechanical properties were obtained from rheological measurements. To demonstrate both the efficiency and working mechanism of the selected hydrogels, a representative study of mocked samples is presented first. After selecting the most appropriate hydrogel composite, a cleaning process was implemented on the marine archaeological ceramics. This article demonstrates the advantages of stimuli-responsive hydrogels in controlling the release of acid solution release, thereby surpassing the limitations of traditional cleaning methods.
在海洋考古陶瓷表面出现钙质结核是一种常见现象。当这些沉积物掩盖了陶瓷的特征时，有必要去除这些物质。不幸的是，钙质结核提供了陶瓷烧制历史的独特记录。酸溶液的相互作用或以物理方式剥离沉积层会导致考古信息的丢失。为了防止考古信息的丢失并实现精确、温和的结核去除，已经开发了响应性水凝胶清洁系统。合成的水凝胶由聚（醋酸乙烯酯）/海藻酸钠网络组成，具有理想的保水性能，对钙离子有响应，并且在经过清洁处理后不会留下任何残留物。选择了四种不同的成分。保水性能的研究涉及量化重量变化。成分通过傅里叶变换红外光谱获得。微观结构通过扫描电子显微镜获得。力学性能通过流变学测量获得。为了证明所选水凝胶的效率和作用机制，首先对模拟样品进行了代表性研究。在选择了最合适的水凝胶复合材料后，对海洋考古陶瓷实施了清洁过程。本文展示了刺激响应性水凝胶在控制酸溶液释放方面的优势，从而超越了传统清洁方法的局限性。
