Spectroscopy and Spectral Analysis, Volume. 44, Issue 10, 2785(2024)
The Identification and Analysis of the Modern Binding Media Based on Multiple Analytical Methods
The study of natural organic binders in historical objects is one of the research highlights in cultural heritage. However,identifying and classifying modern binding media used for restoration is also very important in heritage conservation. It is necessary for the subsequent restoration of ancient ceramics to understand the composition of the binding media used in the restoration of ancient ceramics. To address this problem, a batch of modern binding media for restoring ancient ceramics was analyzed by Fourier Transform infrared spectroscopy (FTIR), Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and thermally assisted hydrolysis-methylation pyrolysis-gas chromatography-mass spectrometry (THM-Py-GC/MS) techniques. The results showed that the characteristic absorption peaks of the infrared spectrum of the binding media at 1 252 and 829 cm-1 were in line with the range of characteristic absorption peaks of epoxy compounds and matched with the standard spectrum of epoxy resin in the infrared spectrum library, which indicated that the binding media was an epoxy adhesive. Moreover, additives such as pyridine compounds, benzoate compounds and primary alcohol compounds are also added to the binding media. Then, the chemical composition of the binding media was analyzed by applying Py-GC/MS and THM-Py-GC/MS techniques, and the binding media was detected as a bisphenol A-type epoxy resin. Moreover, to improve the performance of the epoxy resin adhesive, amine curing agent, diisooctyl phthalate plasticizers and diisooctyl phthalate inactive diluent were also detected to be added to the binding media. THM-Py-GC/MS technique affects the analysis and identification of amine curing agents in this binding media due to the presence of methylation reagents, whereas the Py-GC/MS technique is more suitable for the analysis and characterization of epoxy adhesives. In this study, the use of the Py-GC/MS technique can identify the types of modern binding media used for the restoration of ancient ceramic relics, providing a new approach for the analysis and identification of epoxy resin adhesives, as well as a new perspective for the identification of unknown restoration materials for cultural relics.
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ZHANG Yao-yao, FU Ying-chun, WEI Shu-ya. The Identification and Analysis of the Modern Binding Media Based on Multiple Analytical Methods[J]. Spectroscopy and Spectral Analysis, 2024, 44(10): 2785
Received: Aug. 17, 2023
Accepted: Jan. 16, 2025
Published Online: Jan. 16, 2025
The Author Email: Shu-ya WEI (sywei66@hotmail.com)