YOCOCU, YOuth in COnservation of CUltural Heritage, Rome, Italy.
Nat Prod Res. 2021 Jul;35(14):2335-2345. doi: 10.1080/14786419.2019.1675061. Epub 2019 Oct 12.
In cultural heritage, several initiatives are promoted to transfer the green chemistry in replacing traditional and toxic methods and products, and in ensuring safety of both artworks and restorers during cleaning operations. This study is aimed to establish the validity of new green solvents to replace toxic solvents, commonly used, to remove old paint varnishes. In particular, the research is focused on the use of acetals to remove old varnishes paintings. The acetals are common functional groups in natural products which are generated by reactions between alcohols and aldehydes. The tests were performed on four different resins (DAMAR, RETOUCHER, PVA and PMMA). Several samples were prepared to reproduce the common stratigraphy succession of the oil painting. The performances of the solvents were monitored by visible light/UV light, photography and optical microscopy, spectro-colorimetric analysis. Then, FTIR spectra of the cleaned surface have been acquired to detect the residues after cleaning.
在文化遗产领域，人们提出了若干倡议，以推动绿色化学的发展，用它来替代传统的有毒方法和产品，并确保在清洁过程中艺术品和修复者的安全。本研究旨在确定新的绿色溶剂是否有效，能否替代常用的有毒溶剂，以去除旧的油漆清漆。特别是，该研究专注于使用缩醛来去除旧的清漆。缩醛是天然产物中的常见官能团，是醇和醛之间反应生成的。在四种不同的树脂（达玛树脂、修补剂、PVA 和 PMMA）上进行了测试。准备了几个样本以重现油画的常见层积顺序。通过可见光/紫外线、摄影和光学显微镜、分光光度分析来监测溶剂的性能。然后，对清洁后的表面进行傅里叶变换红外（FTIR）光谱分析，以检测清洁后的残留物。
