研究目的
To compare various optical methods for surface evaluation to assess their advantages and disadvantages and to determine their suitability for long-term monitoring of the state of protective polymeric coatings on glass tesserae of a mosaic.
研究成果
White-light interferometry and re?ectometry are the most suitable methods for long-term monitoring of protective coating degradation due to their ability to quantify surface roughness changes non-invasively.
研究不足
SEM requires a conductive layer, altering specimen properties, making it unsuitable for non-invasive long-term monitoring. SPM's analyzed area is too small to be representative. Digital microscope relies on transparency of the specimen, which may be hindered by glass degradation.
1：Experimental Design and Method Selection:
The study compares several optical and mechanical methods for surface evaluation, including re?ectometry, scanning probe microscopy, nanoindentation, white-light interferometry, and scanning electron microscopy.
2：Sample Selection and Data Sources:
Glass specimens (microscopy slides) dip coated with polymeric coating were prepared and artificially weathered.
3：List of Experimental Equipment and Materials:
Digital microscope (Hirox KH-7700), nanoindenter (Hysitron TI-750), scanning electron microscope (Tescan Mira II), white-light interferometer (Zygo), and a programmable automatic device for angle dependent re?ectometry.
4：Experimental Procedures and Operational Workflow:
Specimens were artificially weathered and changes in appearance were measured over six weeks. Surface characterization was performed using the listed methods.
5：Data Analysis Methods:
Arithmetic roughness (Ra) was calculated to characterize surface topography. Reflectivity changes were analyzed to indicate surface roughness.
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