319 research outputs found
Optimization of copper stain removal from marble through the formation of cu(Ii) complexes in agar gels
Efficacy of Colour Protectors in Urban Art Paintings under Different Conditions: From a Real Mural to the Laboratory
Pyrolysis–GC/MS for the identification of macromolecular components in historical recipes
Non-invasive characterisation of binding materials on painted glass magic lantern plates using mid-infrared fibre optic reflectance spectroscopy
Multivariate analysis of pyrolysis-GC/MS data for identification of polysaccharide binding media
Packed hybrid silica nanoparticles as sorbents with thermo-switchable surface chemistry and pore size for fast extraction of environmental pollutants
Thermoresponsive poly(N-isopropylacrylamide)-grafted silica nanoparticles (SiNPs) have been synthesized and fully characterized by ATR-FTIR, TGA, HRTEM, BET and DLS analysis. Hybrid solid phase extraction (SPE) beds with tuneable pore size and switchable surface chemistry were prepared by packing the polymergrafted nanoparticles inside SPE cartridges. The cartridges were tested by checking the thermoregulated elution of model compounds, namely methylene blue, caffeine and amoxicillin. Extraction of the analytes and regeneration of the interaction sites on the sorbent surface was carried out entirely in water solution by changing the external temperature below and above the lower critical solution temperature (LCST) of the polymer. The results demonstrate that the elution of model compounds depends on the temperature-regulated size of the inter-particle voids and on the change of surface properties of the PNIPAM-grafted nanoparticles from hydrophilic to hydrophobic
Thermally triggered on demand permeability of hybrid silica beds made of packed thermoresponsive organo-silica microparticles
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