研究目的
Investigating the effect of synthetic organic pigments on the UVB degradation of acrylic binder in contemporary art.
研究成果
The study confirms the influence of synthetic organic pigments on the degradation of acrylic binder under UVB exposure, with specific effects observed for different pigment classes. Raman spectroscopy proved particularly useful in identifying photoinduced changes in pigments, offering potential applications in cultural heritage diagnostics.
研究不足
The study focuses on UVB-induced degradation, and the findings may not fully represent degradation under natural sunlight or other environmental conditions. The specific effects of pigments on degradation processes are complex and may vary with different binders or exposure conditions.
1：Experimental Design and Method Selection:
The study employed a combination of Fourier Transform Infrared (FTIR) in Attenuated Total Reflectance (ATR) and Transmission modes, Nuclear Magnetic Resonance (NMR) spectroscopy, and Raman spectroscopy to observe ageing processes.
2：Sample Selection and Data Sources:
Mock-ups of acrylic binder mixed with various synthetic organic pigments (anthraquinones, phthalocyanines, diketo-pyrrolo-pyrroles) were prepared and subjected to UVB exposure.
3：List of Experimental Equipment and Materials:
A Horiba Jobin-Yvon HR Evolution microRaman spectrometer (632 nm laser) was used for Raman spectroscopy. Pigments were produced by Kremer Pigmente.
4：Experimental Procedures and Operational Workflow:
The mock-ups were aged under UVB light, and spectra were collected at various ageing steps to observe degradation processes.
5：Data Analysis Methods:
Intensity and integral variation percentages of specific bands were calculated to evaluate degradation effects. Raman spectra were analyzed using peak fitting procedures with OriginPro Software.
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