Search results for " WATERLOGGED WOOD"
showing 5 items of 5 documents
POROSITY DETERMINATION WITH HELIUM PYCNOMETRY AS A METHOD TO CHARACTERIZE WATERLOGGED WOODS AND THE EFFICACY OF THE CONSERVATION TREATMENTS
2012
Solid state nmr characterization of the waterlogged wooden part of Acqualadrone roman rostrum
2014
The roman rostrum found in the sea of Acqualadrone (ME) was characterized in our previous papers. In the present work solid state NMR spectroscopy was applied on a wooden sample of the same artefact collected by coring and divided in four parts in order to correlate the conservation state to the depth. Results were compared with those obtained for a modern wood of the same species. A structural study was performed by the acquisition of 13C Cross Polarization Magic Angle Spinning (13C CP MAS NMR) spectra. These spectra were acquired to assign the chemical shifts of the species that are present in the wooden matrix. In addition the spectra analysis allowed us to determine the cellulose crysta…
Preliminary studies on treated waterlogged wood by low field NMR spectroscopy
2009
Halloysite nanotubes/pluronic nanocomposites for waterlogged archeological wood: thermal stability and X-ray microtomography
2020
Filling a polymer with halloysite nanotubes is considered a promising strategy to generate nanocomposites with tailored physicochemical properties. We have focused our attention on pluronic block copolymer/halloysite nanocomposites prepared by melt blending. The effect of composition on thermal stability and polymer crystallinity was investigated by thermogravimetry and differential scanning calorimetry. Electron microscopy was used to monitor the nanoparticle distribution in the polymeric matrix. The pluronic thermal stability is reduced by the clay nanoparticles. Concerning the polymer crystallinity, it is slightly decreased even if the melting temperature is lowered by halloysite. Furthe…
The Acqualadrone Rostrum: a physical-chemical investigation to understand the Material History
2013
The aim of this work is to define the conservation state and to ascertain the provenance of raw materials used in the construction of the Acqualadrone Rostrum. In 2008 the rostrum (an offensive naval weapon mounted on the prow at the waterline), from an ancient warship was recovered from the Mediterranean near Acqualadrone, Messina, Sicily. The archaeological discovery has led to the need for scientific research in order to plan the conservation treatment of this artefact. The discovery is exceptional because of the presence of a wooden section from the original ship. The physical-chemical investigation, by using some complementary spectroscopic techniques, was focused on the characterizati…