Multi-analytical techniques for characterization of ancient Egyptian pottery objects from Cairo University excavations at Saqqara

Purpose The study aims to assess the efficiency of nanocomposite to improve the properties of gap-filling materials for pottery artifacts. Design/methodology/approach Five different pastes were used in the laboratory studies. The pastes consist mainly of pottery powder (grog), dental plaster, microballoons and an adhesive of Primal AC33, nano-silica and nano kaolinite in various concentrations. The prepared samples were subjected to accelerated heat and light aging. Besides, some investigations were used to evaluate the efficacy of the additive nanomaterials, such as TEM, digital and scanning electron microscopy microscopes. Contact angle, color change, shrinkage degree, physical properties and compressive strength tests were also conducted. Findings The results indicated that using Nano-silica considerably improves the mechanical strength and decreases the shrinkage of gap-filling materials. According to the results, a mixture of grog, microballoons and Primal AC33/Nano-silica Nanocomposites is the optimal gap-filling paste for archaeological pottery. Moreover, this paste showed a higher contact angle (120°), lower color change (ΔE = 2.62), lower shrinkage (3.3%), lower water absorption (3.36%), lower porosity (5.05%) and higher compressive strength (5124 N/mm2). Originality/value This paper attains to develop an economic polymer-nanocomposite that can be used with gap-filling materials for pottery artifacts.

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An experimental study for using nano-alumina to improving mechanical properties of epoxy resin for assembling glass artifacts

Eloriby,

Mohamed

2023

PRT

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Purpose This study aims to assess the efficacy of nano-alumina (nano-Al2O3) in improving the performance of epoxy adhesives used to assemble archaeological glass. The conservators face a significant problem in assembling this type of artifact. Therefore, the assembling process is considered one of the important stages that must be taken care of to preserve these artifacts from damage and loss. Design/methodology/approach To evaluate the stability of adhesives, the samples were subjected to artificial aging under varying environmental conditions. Some investigative techniques and mechanical testing were used in this study to evaluate the selected materials. It includes a transmission electron microscope, X-ray diffraction, visual assessment, digital microscope, scanning electron microscopy (SEM), color change and tensile strength test. Findings The visual evaluation and the digital microscope results showed that the epoxy/nano-Al2O3 greatly resisted artificial aging. Although slight yellowing was present, it did not significantly affect the general appearance of the samples. On the other hand, the pure epoxy sample showed cracks of different sizes on its surface due to aging, as evidenced by SEM examination. Furthermore, epoxy/nano-Al2O3 has a better tensile strength (11.27 MPa) and slight color change (ΔE = 2.06). Originality/value The main objective of the experimental study was to identify appropriate adhesive materials that possess key properties such as non-yellowing and improved tensile strength by conducting various tests and evaluations. Ultimately, the goal was to identify materials that could serve as effective adhesives for assembling the archaeological glass.

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Multi-analytical techniques for characterization of ancient Egyptian pottery objects from Cairo University excavations at Saqqara

Cited by 3 publications

References 34 publications

Advanced coatings for consolidation of pottery artifacts against deterioration

Advanced coatings for consolidation of pottery artifacts against deterioration

Improving the properties of gap-filling materials for pottery artifacts with nano silica and nano kaolinite polymeric nanocomposites

An experimental study for using nano-alumina to improving mechanical properties of epoxy resin for assembling glass artifacts

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